o 1160 0039894 5

---.... "'

ANNEX ADC-91-111

SnC;;9f-llf ..

SOC PRESENTATION TO PAC October 3, 1991

General remarks on SDC status including non-US participation.

Calorimetry and tracking volume decisions.

Scope and cost estimate of detector.

Subsystem status and R&D (including test-beam program).

Calorimetry, Tracking, Muon Systems, Electronics.

Installation studies.

Preparation for Technical Proposal and summary.

G. Trilling

. M. Gilchriese

D. Green A. Seiden J. Bensinger A. Lankford

D. Bintinger

M. Gilchriese

George Trilling

PAC Meeting October 3-4, 1991

,

COLLABORATION INSTITUTIONAL MEMBERSHIP

U.S.A. 49 institutions including 6 national labs

Canada 6 institutions including 1 national lab

China 2 institutions

Japa~ 17 institutions including 1 national lab

Western Europe 7 Institutions including 2 national labs

U.S.S.R. 7 institutions including 1 international lab

Eastern Europe 4 Institutions

Israel 1 Institution

'-----------___________________________________ ~,,:~.i ~ ~~~- .. ~~~.

r

NEW COLLABORATION APPLICANTS

LAFEX (Lab de Fisica Exp. de Altas Energias) Rio de Janeiro, Brazil

INSTITUTE OF NUCLEAR PHYSICS Krakow, Poland

UNIVERSITE DE MONTREAL Montreal, Canada

UNIVERSITY OF OKLAHOMA Norman, Oklahoma

ftW~: ~ ,,'----------------------- ~I- •• - t -~I~~:,

~~-'

NON-US CONTRIBUTIONS TO SDC Recent Developments

Brazilian group from Rio de Janeiro has applied to join SOC.

Italian collaborators made presentation to INFN Board for Accelerator Experiments. Accepted as PSOC (Proposal for SOC), financed for R&D efforts related to SOC proposal. Full INFN commitment to be discussed in about a year. SOC meeting in Pisa January 8 - 11, 1991.

Canadian Federal Government has offered support for KAON at the level of $240M. Impact on Canadian support for SOC unclear.

The IZHORA steel plant in St. Petersburg has been officially requested by JINR (Oubna) to provide a dollar cost estimate for fabrication of the barrel muon toroids.

IHEP (Serpukhov) physicists are participating in SOC meetings, and are expected to provide parts of muon system.

. Production work may require US dollar infusion.

~------------------------------------------------~-j --~ ~~"'S;: .••

SOC DETECTOR SUMMARY SOLENOID MAGNET

Tracking Volume: 3.4 m diameter by 8m long

CENTRAL TRACKING AND HIGH RESOLUTION VERTEX DETECTION (COVERING 1111 < 2.5)

Inner Silicon Strip and Pixel Systems Outer Gas/Wire or Scintillating-Fiber System Gas/Microstrip for Intermediate-Angle Region

PRECISION HERMETIC CALORIMETRY(COVERING 1111 < 3) Scintillating Tile with Fiber Readout with Lead/Iron Absorber High Spatial Resolution EM Shower Max Scintillation Detector

FORWARD CALORIMETRY(COVERING 3 < 1111 < 5)

MUON SYSTEM WITH IRON MAGNETIC TOROIDS (covering 1111 < 2.5) Tracking Chambers, Scintillation and Cerenkov Counters

10 & PRECISION ENERGY MEASUREMENT OF ELECTRONS/MUONS Electrons: Central Tracking Plus Calorimetry Muons : Central Tracking Plus Muon System

~ ____________________________________________ ~ -J

~~ .. ::

TRACKING VOLUME COMPARISON

COMPARE THE TWO TRACKING VOLUMES:

R x L/2 = 1.7 x 4.0 m2 vs. 1.5 x 3.0 m2

ISSUES:

Tracker occupancy Momentum resolution Impact on solenoid development Impact on radiation doses Cost consequences General considerations

~ f4W~: ~ '------------------------ ~ )-~,~~: ~~'Sii: ••

COST IMPACT OF LARGER VOLUME

Outer tracker (straws)

Solenoid

Central calorimeter

Muon system

TOTAL

4M

8M

4M

5M

21M

~-----------------------------------------~ --~ ~~.:

OCCUPANCY OF STRAW TUBES AT 1033

Full Setup Including Si (1 ass luminosity) . 0.12.....----------------------------,

0.1 .

0.08

~ Q)

0,06 Q

!

l N N .' . ~ - ll\

I tt)

0.04 -

I 0.02 -

...1 I ...1 I

2 3 4 5 6 7 8 OCCUPANCY VS SUPER-LAYER COM81~ED ---_._. __ ._----_ ... _-- .... _-------­

'--... ---- .. _----

IMPACT ON RADIATION DOSES

Increase in dose at EM shower max for smaller volume.

Increase in neutron fluence:

z position (m)

o 1.0 2.5

fluence (n I m2 I sse year) Vol=1.7x4 Vol=1.5x3

3.6 X 1011 3.8 X 1011 6.0 X 1011

5.4 X 1011 6.1 X 1011 1.8 X 1012

'------------------------------------------------~I'=~ ~ ~,-~-.:

~~~::

~'~ • ..LlJ am '"1

~ I • ~ , 0 \ c.n , \ S , , 1 1 1 1 , 1 1 1 1 1 1 1 1 1 1 1 , 1 1 1 1 , 1 1 1

\ Vll~ • 1 -.....)1

0\ \

--I 1 ,

II \ 1

VJ\ • 1

0\ 1'-" 1

N

H::o-. t..:>

S

___ &; ~ \\'3.4kr:d'"0\ c.n (\/0 A 1\ 1 ___ "l\\ \ s

~

k> o S

N

..... o o

~ ~ C tn ..... o m~ en "'u'm Q.~en mml> _ .... -f

cg g-m -tn, c _0;:::;'

3 cg (J) _0 ::E: ::Sco g3~ -._om ~g:D "-"tn -c ::;: s: m,< l> C;; >< ::s ... :T CD tn CD tn

'-""

()

"'" > Q) ,. c-'

,....-( 100

II +I

0.. ~

(u

--:J ~

:::t 10-1 ~

'-.... r-:;:l 0..

"'" T-"I ~

'0

a

1.7rrlx4m vs 1.5mx3m

o ;::: field type 1 (1. 7mx4m, liquid argon) x ;::: field type 3 (1.5mx3m, liquid argon)

x o xx 0

xxx 0 XXXXXXXXXXXXXXXXXxxXXXxXXXX 00

000000000000000000000000000000 ox+

vertex eonstr 11 pixel 00 silen(barrel) NN silen(intermd) NN scifl(barrel) 10 straw(barrel) 1N se fi(intermd IN

0.5 1 1.5 2 2.5

pseudo rapidity 'r}

IMPACT ON SOLENOID DEVELOPMENT

Conductor has been optimized for a 1.7 x 4 m2 coil.

Engineering calculations have been done at KEK/FNAL/Toshiba for the present dimensions. Several months of lost effort if they have to be redone for new dimensions. There would be delay in development of prototype.

~-----------------------------------------------~I'=~ --­~~~- .. ~~;;::

,

SOME GENERAL ARGUMENTS (against changing tracking volume)

Tracking volume change, once implemented, is irreversible.

It is not clear that any straw layers can be at R < 1 m. 70 cm of radial space is more comfortable for pattern recognition

50 cm.

There is considerable momentum in magnet development. It would be unfortunate to slow it down.

If silicon remains the same, the geometry of the intermediate tracker becomes more awkward in the smaller volume.

~------------------------------------------------~ ~ ~~::

r

SDC DECISION ON TRACKING VOLUME

Retain tracking volume radius at its present baseline value 01-1.7 m.

The tracking volume length is to be specified in the range 3.5 - 4.0 m, after further study of where the optimum lies. It will be specified by the November collaboration meeting.

~----------------------------------------------~ --~ ~~-'

,

SOC CENTRAL CALORIMETRY History

May 1990 (Eol) 4 technological options

November 1990 (Lol) 2 options a) Pb/La b) Scint. tile with WLS fiber

August 1991

September 1991

Sept. 12-14, 1991

Sept. 26, 1991

(Pb/Fe for hadronic absorb.)

Extensive review Requirements document LA Conceptual Design Report

Scint. tile Conceptual Design Report

Technical Board Meeting Calorimeter presentations and discussion Impact on other systems, costs, integration Technical Board recommendations

Report to Collaboration

~-------------------------------------------------~ --~~s··

,

CALORIMETER CONFIGURATIONS

LAR Mod A Mod B

Total depth (11=0) gA gA gA

Total depth (11=3) 11 A 11 A 12 A

BARREL EM Longitudinal segments 2 1 1 Transverse segmentation 0.05 0.05 0.05 Pb thickness (mm) 4 3.2 4 LARIScint thickness (mm) 4 2.5 2.5 Depth (XO) 25 22 22 BARREL HAD1 Longitudinal segments 1 1 1 Transverse segmentation 0.05 0.05 0.1 Pb/Fe thickness (mm) 14(Pb) 25(Fe) 21(Pb) LARIScint thickness (mm) 2 2.5 2.5 BARREL HAD2 Longitudinal segments 1 1 1 Transverse segmentation 0.05 0.1 0.1 Pb/Fe thickness (mm) 14(Pb) 51 (Fe) 46(Fe) LARIScint thickness (mm) 2 2.5 2.5

~--------------------------------------------~ ~ ~~-}

Liquid Argon Calorimeter

~ ....... : ...... :

:}~% '----------------------------- ~ .. :' -~\~~:i ~~~i

Scintillator Calorimeter (Model A) Iron-dominated Had 1

SEVERAL VIE\,.,IS OF A TYPICAL BARREL CALORIMETER \,.,lEDGE, SHo\,.,lING PMTS, FIBER ROUTING GROOVES, AND EM 'PIANo \,.,I IRES'

LEAD PLATES AND TILES

STEEL HADRON ...,

\lEDGE \ I "" , f

SHOVER MAX LAVER

3RACKETS CONNECTING \I[DGES TOGETHER

HAC rJ£!:~ ROUTING GROOVES

PMT. SUPPORT BRACI<ETS

'PIANO VIRES' HOLDING EM LEAD/SCIN STACK IN COMPRESSION

COVER PLATES OVER PMT SUPPORT BRACKETS

'-!~ARIREL !:UPPORT CRADLES

STACK or PMTS CAUSED BY TO\lERS" CUT BY VERTICAL READ-OUT CRACK

Figure 3.1(c) - Several views of a. typical barrel calorimeter wedge, showing PMTs, fiber routing grooves, and EM "Piano Wires".

Scintillator Calorimeter (Model B) Lead Had 1

Tile/Fiber Descope 4 Calorimeter (Quadrant Cross Section)

4487.60 - ___ --1...._ 4344.00 4414.00

4056'44-mn~~fb

2378.56 -lttrfrmm':rJ'M~~~~i;;i •• ;a 2100.00~~=~~;~~~=~;;~!f 2050.00 1700.00

o o o o ..

432.00 EM (Pb)

.... 0 en 0 ,....: ..,;. ,... ~ ~ .... ........

Tile/Fiber Descope 2 Calorimeter

Figure 4.1 a)M 0 D EL B Quadrant Cross section, b) End Section

ID ..., cO ,... ..., co

J

.... o en ,... o ,...

,. Comparison of the liquid argon (LAR) and scintillator (SCINT) calorimeter options.

'. .

Electron acceptance

EM resolution-stochastic

EM constant term

Electron, 'Y ID, isolation

Hadronic resolution-stochastic

Hadronic constant term, e/h

Hadronic transverSe segmentation

Missing ET measurements

Cost (including impact on other systems)

Schedule

Magnetic field unifonnity

Integration

Safety

Impact on electronics, DAQ, trigger

Muon system performance

Neutrons, albedo in cavity

Flexibility, upgrade

High L perfonnance

Maturity of design

Radiation resistance

Ease of calibration

~~"""""""""'"

d ::::} ,

I "" '\~~: l~j

l.AR SCINT

x

very close

x

x

very close

x

x

x

x

very close

x

x

x

x

x

x

x

x

x

x

x

l '-------------------------------------------------~

Radiation. Lengths V.S. Pseudorapidity

o x .s: -0)

C III

4----~--------~--~--~~--~--~--~--------~ - CobJe Troy Section(90%) - _. Track Support Arm Section(5%) • •• Sol. Support Arm Section(5%)

Scintillator Calor .

• • "

~ :

~ 2~---+----~--~---+--~~~~~~~~~--4---~ C o ..-o

"0 o ~

o . 0.0 0.2

7

6

o 0

0.4 0.6 0.8 1.0 .

•

0."

1.2 1.4 L6

LAR Calor.

• 1.6 2.0

, Noise/ Pileup in LAR Calor.

per Prump " per Channel

Section N amp N,ap <r> CD C, C,o' n t~al ENC ENE ENE Pileup Total Mip Mip

em pF pF pF ns {C MeV MeV MeV MeV MeV SIN

EMI 1 5 236 970 340 1310 5 60 1.1 27 27 30 ~O 32 0.8

EM2 1 26 255 5680 460 6140 11 60 4.9 75 75 54 92 161 1.7

HADI 2 18 314 3100 1030 4130 9 100 2.8 194 274 44 218 662 6.3

200 2.0 80 113 63 129 5.1

HAD2 2 27 387 7070 1530 8600 13 100 4.9 337 477 3 477 993 2.1

200 3.5 139 197 4 197 5.0

The total noise in the EM section of the calorimeter is essen tially constant with peaking time in the range 60 .Ie. tpeak .Ie. 100 ns (variation is +/- 2.5%). The peaking time is selected to be 60 ns to provide better pileup supression for higher luminosity running. For a luminosity increase from 10**33 to 10**34, the total noise in EMI plus EM2 will increase from 115 MeV to 278 MeV (Le., proportional to Lum**0.38). This value of tpeak depends on the pileup calculation in section 7.3; a more detailed calculation will be required to finally select the shaping time. The use of variable shaping time shapers (Section 7.3.1) will enable the optimization to be based on observed backgrounds. Note, however, that a variation of +/-30% in energy deposited per crossing corresponds to a variation in the total

"

(1t

ns

< 1

< 1

2.8 -2.6

4.8

3.9

EM noise of 10%. ~~~~·T~~·n:::... ~ ~ ~:::-

~E~:

Noise/ Pileup in LAR Calor.

SUMMARY

• Fast LAr rlsetime preserved by electrode structure

• crt < 4 ns for >2 Ge V in EM tower crt < 4 ns for >80 GeV jet (both are better in endcap)

• Effect of noise and pileup on EM resolution: .JI == 0.13 $ 0.22 @ 10**33

Et ~Et Et

• H --> yy efficiencies - single yefficiency reduced 1 % [4%] - mass resolution worse by 5% [200/0] - event efficiency 0.58 (fast) --> 0.56 (LAr)

0.60 (fast) --> 0.52 (LAr)

• H --> WW --> ev + jets; isolated e­efficiency 0.92 [10**33] --> 0.72 [10**34] (tighter cuts)

o

e/h Ratio from Simulation

CALOR SIMULATION 10 GeV PIONS j l..i(Expt.oata-Solid Pls) 5In~.TtlmeOI:2458 nse..s

J:

Cln.= . cm ESKALE= 5 GeV

Fe/SCIN=2.5/.5 em. !

1.2

t -- ~

• :Pb-Sb Alloy L: -Clad SS ............

1.0 t---: . ~ I· I L. I

t DU/SCIN=Tab./.25 c

.B r .. I • , ! ,

5 10

Thickness Ratio (Tabs/Tsci)

, 0 !~ ~ 113 '0:

-~ ..c: .,-J OJ

j 1

l

CALOR SIMULATION

10 OeV PIONS Inl.Time=48 nsee Absorber= 1 Rad.lenglh

1.4 K8= 0.0131

1.2

0.56 em

1.0

O.B w...J....L..JL...l.----'---I----L--L-...I.-..L~I'---..L---'---'--' 0.1 O.IS

Thickness Ratio (Teci/Tabs)

Preliminary Results of Liquid Argon Test at BNL

1.2

0.8

o 5 10 15 BEAM ENERGY (GEV)

Interaction Lengths vs. 11 in LAR Calorimeter

7

VI :x: t- 6 \!) z UJ _J

Z 5 0 -

r-U ~ 0:: UJ 4 :-z -

:3

2

RAP 10 ITY

,

COST COMPARISON

Liquid Argon minus Scintillator

Calorimeter cost Electronics R&D Prototypes Installation Underground hall Muon system

Total cost difference

+9 M +7 M - 2 M +1 M +1 M +3 M +10M

+29 M

Giving the scintillator calorimeter 2 EM depth segments in the barrel, and O.05xO.05 granularity in HAC1 to make it the same as the LA design would add about 14 M to the scintillator calorimeter cost.

~-------------------------------------~ ~~~~:; ~~~::

300

250

200 -.. E C,) 150

'--'"

p::: 100

50

0 a

300

250

200 -.. S C,) 150

'--'"

0:: 100

50

a a

(1) magnetic field contour of B~ Type 1. (r.z/2)=(1.7m.4.0m). liquid argon

. I - .. -.. .. .. LA ... .. ... .. SAtUZEL ..

... ... .. ... . .. ..

SOLl: .... OIO ENOCAP •

L..A _

.. .. ..

(1-:'

1 100

eo! -:

7 I

200

Z (em)

Fig.l

300 400 500

(4) magnetic field contour of ·B z

. .. ...

....

600

Type 4. (r.z/2)=(1.'Zm.4.0m). Tile-fiber. EM(Pb). Had(all Fe)

SOLE" "-10 I 'D

.. ..

100 200 300

Z (em)

Fig. 2

400 500 600

field non-uniformity effects on track triggering

>. o ~ (l) ..... o ..... -.... Q)

J... (l)

bD bD 1: E-<

1.25

1.00

0.75

0.50

0.25

0.00

0.8

0.6

0.4

0.2

o o

o

trigger method: slope at r= 161em

( -1.63 < 7J < 1.63 )

o field type LA x field type TF(Fe) + uniform field

2.5 5 7.5 Pt (GeV Ie)

Trigger Pt Threshold

11111111 •••••

10 12.5 15

IMPACT ON TRACKING

I. Magnetic field non-uniformity (Task Force). (Note: Field non-uniform in all designs presented,

least non-uniform in Fe/scint. hadronic calorimeter design, could be fully uniform with reentrant EM section).

1. Reduced trajectory bend angle at large z, Softens trigger threshold.

2. Modified time-distance relation at large z, Greater tolerance on synchronizer--softens threshold.

3. Pattern recognition, Depends on detailed pattern recognition procedure.

4. Momentum resolution, Very small effect for designs presented.

II. Neutron fluence in tracking cavity reduced by scintillator. Reduction factor is 3.

"-'"-------------------- ~!#~ -~~::

,

IMPACT ON MAGNET

Flux return far from current sheet (Pb/lA, Pb/Scint. for HAC1). large compressive stresses(-1700 tonnes) on conductor. Small magnetic decentering forces « coil weight). Non-uniform field.

Flux return near current sheet (Fe/Scint. for HAC1, reentrant EC). Reduced compressive stresses. Larger magnetic decentering forces (> coil weight). More uniform field.

For the designs presented, the compressive forces varied from 1700 to 1100 tonnes. It is possible to have forces down to 100 tonnes with reentrant EC and Fe/Scint. HAC1. This requires further study to understand the impact of reentrant EM geometry.

~---------------------------------------~ --~ ~I~~ •• ~~-B

IMPACT ON ELECTRONICS

From point of view of electronics performance, there are no significant differences between LA and Scintillator technologies.

Undesirable environmental consequences for LA: Detector electronics crates sit in 0.1 T magnetic field.

Precludes commercial power supplies, fans, etc. Servicing and trouble-shooting more awkward.

~ -

IMPACT ON MUON SYSTEM

1. Effect of multiple scattering in calorimeter absorber on level 1 trigger threshold:

Calorimeter design All lead HAC (LA)

. (Bend angle)/(Scattering angle)

2.8 All iron HAC (Scint.) Lead/Iron HAC (Scint.)

3.9 3.2

For fixed threshold, level 1 trigger rate is increased by Pb.

2. LA calorimeter is larger (ilR = 0.4 m, ilL/2 = 1.6 m ). Hence larger muon system is required, (included in cost comparison).

~~: ~ '------------------------- ~r~~·! -~~ ..

Radiation Hardness Test Beam Module

PMT

- ....

< :>

0.032-

H f

~ 0.105 .-

1 0.040- I 0.04s-H

Figure 8.2 Radiation hardness test beam module.

1.0

,--... Q) S-4 0

'+-4 0.8 Q)

~

" S-4 Q) ~ '+-4 0.6 < '--'

0 .~

~ ro ~ 0.4

):{ Module A+B "'C ...-4 Q) <> Module C •• ....t

:>-t x Module El ~ 0.2 ...c: 0 Module E2 b.O • ....t ....:l

0.0 10-1

Mean Dose (Mrad)

Figure 16: The 2.5-GeV electron shower induced damage as a. function of the mean dose, measured with electron beam (in square-crosses) and with a l06Ru source (in squares, dia­monds and crosses). The curve is a fit given by Eq. (2).

26

0.6

0.5

,.--.... . ® CO ~ 0.4 . < (!) '--'

.'"d @)

xt ......c Q) 0.3

• .-1

X ~ ex- Y-7 fiber -+oJ )® ..d X tlD 0.2 • .-1

€) .....:l X

0 Before 0.1 ~ x After

0.0 -5 -2.5 o 2.5 5

Position (ern)

Figure 15: Response map of a tile/fiber assembly measured by scanning with a lO6Ru source. This assembly was non-uniformly exposed to 6OCo with a dose distribution of 0.62 Mrad at the center and 0.20 Mrad at the edge.

25

4

3 ~

~ '-"

r£t "'- 2 Q)

btl as e IS

"C b

1

o

o

o 20 GeV x 50 GeV <> 100 GeV

t ~

10 20

~ %

i <I>

<I>

30 40

Peak Damage (%)

<I>

50

Figure 21: Damage-induced error to resolution as a function of the pe~k damage for energies of 20, 50 and 100 GeV.

31

--------------------------"

PHT SUPPORT-J !lPACKETS

o

VIE\I OF TIL'€!; ~ND tJBERS INSIDE AN EN~AP EM TILE

PAN \

'\

\, ..

-,

U 'l

// ~-' / ./

/ /

/ / , // /'

0'/'

SIC"A rIB,.j R(TRACTABL( PINS TO SUPPORT TlL( PANS

,

,

/ L!:F"T SIDC 01'" PAN HAS CLCAR SCCTION or I'"!BCRS RCMOVC,s' TO SI-4OIJ TM( SHAPC or THC VAVCLCNcnH SHIF"TE:? nBE:R INSIDE "" 7" .. " '. AS .,,"" ':>

/ /

/

/

// .----

CALIBRATION SOURCE TUBES

OURCE ~JL--------------~TUBE

BULKHEAD

CE TUBES FOR HAC2

SOURCE TUBES FOR HACl

'JOTE: -UBES .;RE -RUNCATED FOR ':LARITY

SOURCE -:-UBE~ r-OR EM

Figure 9.2 Layout of the source tubes for a single barrel wedge. Two basic tyubes fan out to the 2 towers of the wedge. Each tile in the wedge is scanned transversely.

• • c t· • !

Z c

I-0 ... 1 N = ~ ts z

LONGITUDINAL MASKING 0.m4 ,-----------------------,-" o.a:s:s o.m:t

0.031

a.m o..c::zD

Cl.D2IS

rurr:r 0.Q25

~

o..a:H

G.O\a

0 12 145 :0 24- .

C1Q34

Q.Q33

o.m:t .

o.cnt o..as

C1.Q29

o..a:.

CUJ:D'

0.Q25

o.a:. o.a:K

O.Q%S

&.c:'I2t

cu: Q.OIs.

CI.OUl

0 .. - B-- 1:- 16 :za; 2~-

Figure 6.17 a) The longitudinal response of tiles in a tower. The hortizontal scale is tile number ranging from 1 (front) lo 23 (back). The vertical scale is relative light yield. The RMS varia.tion is 11.5%.

b) The same lower as in (a), after longitudinal masking. The RMS varialion is now 2.6%.

RH Scintillator Output After 2.4 Mrad Co60 1.0

.-.., .-c:: -..... o c:: 0.7 I­o

0.6 I-

0.5 o

I

I

48

I I I

;J! ~

I I I I I I

-

-

-

SWM, j.L=O.88, a=O.02

WFH6, j.L=O.83, a=O.04 -

I I I I I I I I 1

96 144 192 240 288 336 384 432 480

Time After Irradiation (hrs)

Figure 8.12 Average light output from 3 disks of 2 inches diameter read out using 2 wraps of 1 mm BCF91A.

r

CALIBRATION & RADIATION DAMAGE

CALIBRATION Source tubes allow irradiation of each individual tile.

Information can be used to correct for damage through longitudinal masking.

Z --> ee occur at rate of 104/tower for 1 Mr at shower max.

BARREL DAMAGE EXPECTATIONS With existing scint., expect < 20% light loss at EM shower max

for 100 years at design luminosity ==> Acr/E < 1 %.

ENDCAP DAMAGE EXPECTATIONS With modest scint. improvement ( .... 2), damage factor: e-D/10 Mr.

This implies at 1111=3, L=1033, 50% damage after .... 12 years. With 2 long. EM sections, this loss can be corrected event by event

to dalE = 10/0. Longitudinal masking can also be used to greatly reduce damage effects.

ESTIMATES ON REPLACEMENT OF ALL EM SCINT. IN ENDCAP 1 - 1.5 months with one shift.

200 -

175 I--

150 ~

125 l-

JOO I--

75 -

50 -

25 I--

o .

80 ~

70 ~

60 ~

50 ~

I-

-30 I-

20 ~ l-I-

I-10 ~

o .. ,

~ 1.36~

Constant 186.5 Mean 840.8

c~ 33 tJ-,i/ 5igma 30.27

PcJu-tA1 5",,1 -f/"t:l ~-f~" ., -f-A!JJ ;., c:

71~ r~

I I l --. .... A I \ _t

200 400 600 800 1000 1200

I()O 6eV /EI«fnmS 10 5G.4 Entries 334 Mean o.lln-RMS 0.2824E-01 r 0.1525 Constant 71.43 Mean 0.1198 Sigma 0.1616E-01

-F 7~ cr_ ,." Z --<'>

~ *

I .. n. " "~ I ~ I , 0.6 0.8 1.2 1.4

SbL.

CA~r Ps M 0 ~u\..E.

CD F

MoDuLE

2

of

Tile/Fiber EMC Resolution

t

t Light attenuated by x 2.6

m Light not attenuated

Prediction from 18%/vE and beam width

25 30 Electron Energy (deV)

-C)" ~-II-e." " .. -1"'/

PI. 0 -foe !ee-r".-o,..r

jj ft &~" .1. ( Z ~.I oJI :1' oS-

11 ~ ~,

t

-

,

PRELIMINARY BEAM TEST RESULTS

Liquid Argon (Brookhaven) EM module 6 mm Pb plates

alE = 1So/0/1E, Hadronic module 12 mm Pb plates

alE = 64%/1E,

From fit to eht data, e/h = 1.23 => 3.2% constant term

Scintillator tile / fiber (Fermilab) ANL EM module 5 mm Pb 2.5 mm Scint.

alE = 1S% /1E, CDF EM module 4.S mm Pb 4 mm Scint.

alE = 1.6% for 100 GeV e CDF hadronic 5 cm Fe 4 mm Scint.

alE = 8% for 150 GeV 1t

EM Photoelectron yields scaled to SCSNS1 and SOC tile/Pb ANL SO Pe/GeV CDF 150 Pe/GeV

(Uncomfortably low? increase SOC tile to 4 mm for EM)

~i ~ '------------------------ ~, <-~&\~~ .•.

~~ ..

CONCLUSIONS

The SOC has adopted scintillating tile with WLS fiber as the technology for the central calorimetry.

The choice of hadronic absorber in HAC1, and its geometrical relation to the current sheet in the magnet still have to be determined. A committee is being set up, and it is expected that this decision can be made by the SOC November meeting.

There is still much R&D to be done to ensure that radiation damage effects do not degrade performance, and that an adequate calibration/monitoring system is implemented.

With the choice of a single calorimeter technology, it is essential to bring together the efforts from ALL the groups which were working on central calorimetry to ensure that adequate intellectual and technical power is brought to bear on the design of the SDC central calorimeter~

~'-------------------------------------------------~ ~ ~~~ ..

TECHNICAL REVIEWS/COMMITTEES

Review of Front-End Electronics Status (Sept. 9 - 11) Review committee:

Electronics/OAQ/Trigger Steering Committee Eight other experts from SOC (engineers & physicists) Five non-SOC experts

Muon tracking chamber review committee Recommend choice of muon chamber design (Feb. 1, 1992). Chairpersons: A. Maki, R. Thun

Hadronic absorber evaluation committee Evaluate calorimetric impact of various absorber configurations

(November SOC meeting). Chairperson: J. Siegrist

Central tracking review committee Recommend configuration{s) contained in tech. proposal (Feb. 1, 1992) Chairperson: T. Kondo

"-----------------~ -~~:l:

M. Gilchriese

PAC Meeting October 3-4, 1991

Decisions and Major Reviews

Past

• Tracking volume

• Central calorimetry

Future

• Forward calorimeter review - what is supported in FY92 Nov. 1

• Central calorimeter absorber configuration Nov. 17

• Radius of muon system barrel toroid Nov. 17

• . Tracking system review Nov. 17

• Tracking system option(s) selected Feb. 1

• Barrel muon chamber design selected Feb. 1

Detector Dimensions and Parameters

Progress since July PAC meeting

• Tracking volume decision

• Calorimeter decision - precise dimensions of calorimeter remain to be determined. Next step is absorber choice by mid- November

• Electronics and access space on back of calorimeter and associated cable plant. Preliminary study complete. Finalize in mid-November.

• Muon system layout. Particularly thickness of barrel toroid and of inner muon chamber(BW1)

Next maj~r iteration by November 17. Freeze dimensions of muon system and envelope of central calorimeter for Technical Proposal.

"---------------------------Bl--'

Muon Chamber s Absor-ber

Cerenkov Counter-

Scintillation Counters

Intermediate Tracker

Superconducting Solenoid

Outer Track er

F orwat-d T or-oids

for-wur I,j Colur-imeter­

Barrel Toroid

- Borrel Calorimeter

Silicon Tracker

End Cap Calorimeter

Muon Chamber s

aWl

(AlORlHEt£R MAX RADIUS

1---------6'l60'------!

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LBL DWGa 2300375 9130/91 D SHUMAN

........... '.th.III).'" '"

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S( INT ILLATORS BS3

1'------------15290---------l 1----------14290----------l

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t

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6950

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4770

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9680 t\. I-- 2750-r-- I "-aUAD SHiElD & CRYO 1----------11790--------1 - 2000

1------------12000 ~ ABSORBERS

1---------------14190-----1 1------------------173901--------~

--------------------200001-----------1 y

NOTE. All DIMENSIONS ARE IN MILLIMETERS. SOC DETECTOR DIMENSIONS LBL DWGn 23003/5 9/30/91 05HUMAN I I I I I I

z.-J n 1 ., 1 C; 1-1

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'''lIf • Oll OIt1(NSIONS ARE IN"" OVER IN(lIES

1 • I \11'" I O( A' I o.,~ SOI1( P I r( \I ( AIIII \ , SI"'rOllI'.

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MUON BARREL TOROID & CHAMBERS

LBL SDC 0051 REVISED' 9/23/9'

A 1: SCHE\1ATIC DIAG RA'1 OF CA RLE & PIPI:\G ROlTES (with maximum use of the cryostack)

Route Via Octant Description of sen'ices

A ...... 1. cryostack ...... Solenoid. all sen·ices. Silicon tracker. all except butane pipe (see E). Straw or Fiber tracker. all sen'ices. Gas microstrip. all services.

B ...... 1. cryostack ........ Same as A except no solenoid sen'ices. C ...... 1. cryost3ck ...... Calorimeter and internal crate services. except cooling water (see F D ...... 7. South ............ South endcap, all services except cooling water (see F).

8. North ........... Sonh endcap. all services except cooling water (see F). E ...... 7. South ............ Butane for silicon tracker. F ...... 3. South ............ Cooling water for all crates

• Use existing database to aid in technology selections and scope definition

• Improve mechanics of estimating/scheduling

• Plan for cost/schedule estimate to be included with Technical Proposal - see schedule of events

• Present estimate - total cost including contingency

System Tracking systemst

Calorimeter systems Superconducting solenoid Muon system Electronics systems On-line computing Conventional systems Installation and test Project management

TOTAL

Cost(FY91 M$) 95

160 35

120 100 10 10 30 20

580

t Includes III Icon .ront-end electronics ~

'-----------_..---------------~~ -, .;'.J~'§j=-

Nam,

SOC CIS MILESTONES WRE 9/91 · · • ......... ---.----.---'-------II---:--+----=,,---+----'--t-----.~-.. --.-__ .. --+ ____ ._+-_, ___ .--+_

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'DescoP~d Oet. Cost KIck-orr Mtg - .. hn-"r-. ..- .----- .. ~t~~~:~··:=~~==i=-j-----L _. --. • -==~ ==.--.--. ---'--'-" ---....... -1-. c~·;·;·te .. p~;·ll;·~ .. D;_;;tSoc~;·t-e;;k· .. - · .... · .... · .. ·r·· .. · ........ -._.-.. --._-.. . A .t] ......... _-1-.-......... - .. -............... -'-'---'-"- t----.

M·~·d·i·;v·cost EstImates .-......... -... -.. --. --.. -.... ~.---... ----... -. ~ I .. ~~=-:-~==-....... -- .-.. . ". ... ..... .. ........ " ... " .. ' ". "". ",." i .,," "',, "".. .." .. " ...... o· .. r .. --.. · .. · .. · .. · .. ·:=""""' .. · .. · .......... "" ......... " .. " ..................................................................... ..

~rellrn Draft Cost 600i( Compllt.: .. .+ De;~op;~~;I:~p;2:- . ......... . .... ! * ............................................ -........ -._ ....... _ ...... --._-_ ......... · ...... · .... c···· .. · ...... · .................................................................................... -.......... , ................................................................................................................ _ ... _ .......... . Perrorm Independent Cost RevIews : 11 SJ ·Re~·ie;;·; .. co;·p·l·e·ted· .. -........ --.. ·--- .. ·-.... · .. ·i·· .. · .. · .. ·· .............. -......................... -........... -...... -... - .... -.. ---....... -............................................ ]: ..... .."-."-- .-._--... - - .. .. ......... __ .... _. __ ... -.- -- - ......... :.--....... .. .. _ .... _-_ .... _-.. _ .. -------- ._ ..... _-_._ ........... __ .. ~ .... -........ -................... --_ ...... _-= ::::---_ .......... ---... __ .

fi~~*~:::~:rJO:~~~:I:.~ --.. +-j----.----+---- ----.-L . ...1~-:r ~~-.---+-·F·i·~a1D~~rt C~~tBook Complete ........ · .. ·-i-r-- -~ •. : . ........ -.... _ .. __ ._- ---........ -.:.-... -._- ... ----3----.. ·--L .... ----" ~-.~.~.~..t..!~_~ Fln_~~~ Revs to Cost Boo~_. - ..... -1--.. L-._.. _____________ .+.. .. _. __ . ~ ~+-

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D. Green

PAC Meeting October 3-4, 1991

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CALORIMETER CONCEPTUAL DESIGN TILE/FIBER SCINTILLATOR OPTION

Volume I

September 3, 1991

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ID .., .; .... .., 40

.. o • .... o ....

How good are the pieces?

• Absorber Thickness

(j = 1%

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Testing system

Light Yield 3 p.e./mip-layer

Transverse uniformity cr - / Z Longitudinal uniformity u = 8%

Scintillator thickness (j = 3.6%

Fibers + splices u = 3.8%

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How good is the whole calorimeter?

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September 1-6, 1991

3 towers instrumented

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Momentum tagging to a = 1.5%

2 gas Cerenkov counters to tag electrons

Beam 30-50% electrons

Tunable 15-35 GeV. Can go to 100-150 GeV but rarely 0.-;-.. .or (I') / 11/ ~ s) 7.7 (;..

PWC's

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Matches calculation of 18%.JE "

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6

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please sena CU~ to t~e SDCCALCR.CIS as soon as possible. 7hanks. Dan

THE RADDAM TASK FOR SOC CALORIMETER FY92 RiD

Dear Co I leagues, The note I sent you on task responsibi J itips within the FY92 bud7et did

not spell out the boundaries of the tasks. In particular, the tasks or scinti I lator devel op.ent , raddam, and optics development logically overlap. Below please find a definition of the boundaries between these tasks.

1 . SCINTILLATOR DEVaOPMENT

a. fund RIO on basic research on plastics. b. fund RIO on basic research on scintillator and wavelength

shifter fluors (e.g. red/green) c. fund RIO on scintillator fabrication process (e.g. injection molding) d. develop a predictive model for long term aging.

z. preliminary radiation tests with Co of sma I I samples. pass screened candidates on to Task '2.

2. RADDAM

a. cut and groove any new plastics produced in Task ,I b. screen complete ti Ie/fiber assemblies with Co irradiation, 1,2,4,8 Mrad

evaluate w.r.t a SCSC8I+BCF9I standard. DOCUMENT the results. c. setup long term, low dose rate tests and perform them. DOCUMENT the

results. d. make sets of 20 tiles and fibers for any candidiates for e beam tests. e. help take the data at IHEP/Beijing f. collate and~OCUWENT and DISSEMINATE the e beam test results.

3. OPTICS

a. evaluate the optical properties of any new candidates fro. Task ,2. b. evaluate any candidates for endcap/barrel Ibaseline l plastics for

light output, and uniformity (e.g. many fiber systea) c. setup a standard light output setup. define a standard SCSC81+8CF91

light output vs time for Phillips XP enhanced green readout. measure a'i samples from b, compare to the standard, and DOCUMENT and DISSEMINATE the results.

d. evaluate candidiates for the baseline WLS deployment (e.g. sigma tile and its two fiber equivalent.) Document light yield, uniformity and time stability in the mechanical configurations expected to be used in the EM and HAC calorimeters.

~ .C3sa let ~e Know t! leur !~S~ttu~;on wtsnes ~o take responslD~ I ity for 1 or more of these RADDAM tasks. I need to know wnat resources YOU wi I I bring to be,r on that task, what sypport you need to accomp/ ish the task, and how you plan to define/supply the ftdel iverables ft associated with the task.

I need your responses ASAP. We wi I I present a first cut to Gi I on Oct 8. I would like to distribute a draft allocation by E-mail somewhat prior to that meeting, so that your feedback may be addressed. Please get back to me on the RADDAM task so that I can factor your wishes/responsibilities into the budget.

Cheers, Dan Green

A. Seiden

PAC Meeting October 3-4, 1991

SDC Tracking System

October 3

PAC Subcommittee Meeting

Tracking is one of the most challenging areas for an sse detector.

Example: For standard luminosity, dosage of about 0.25 megarad per year at a radius of 15 cm.

Occupancy of about 10% at a radius of 80 cm in a 4 mm diameter straw tube covering 1.5 units of rapidity.

In addition, the physics is very demanding:

(1) H O ~ ZO ZO ~ 4 charged leptons requires very large rapidity coverage, 1171 < 2.5.

and

High efficiency for track reconstruction and lepton identification since event reconstruc­tion rv (track efficiency)4.

(2) Detailed study of {[ events requires:

Lepton identification within jets, and

B vertex tagging

These requirements lead to systems which are a significant extension over present tracking sys­tems.

They require:

(1) Very large, very precise, low mass mechan­ical structure.

(2) Very fast readout.

(3) For straw tubes and silicon detectors, very low power per channel because of the large number of closely spaced channels.

( 4) Simultaneous, high speed, data collection and readout to avoid deadtime. Leads to complicated system issues in areas such as cross talk.

4.000

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Fig. n-I. A section through one quadrant of the tracking system of the baseline design.

The tracking system has been descoped signif­icantly.

Motivation: reduce cost and reduce the total amount of material within the tracking volume.

Systems presently under study:

7 to 8

4 to 5

layers of silicon within a radius of 50 cm covering the full 'TJ range.

superlayers of straws or fibers from 70 cm to 170 cm covering I'TJI < 1.8.

The region of I'TJI > 1.8 and radius of > 50 cm is very difficult. Present focus: Gas microstrips, since performance is well matched to require­ments.

PROPOSED CENTRAL OUTER TRACKING SYSTEM

~====================================~ ~~~~==============~~~~~~~A

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Have appointed a committee, chaired by T. Kondo to finalize tracking choices for the tech­nical proposal.

Unlikely to be able to make choice between straws and fibers this year. Systems are not mature enough. Try to quantify, given present knowledge, for the two choices: Expected per­formance, cost, risk, as well as optimize the full tracking geometry.

For studying the geometry and physics perfor­mance: SDC has mounted a significant effort to generate simulation tools to look at the track­ing performance. Includes silicon plus straws or fibers and a realistic simulation of the ge­ometry and effects of material in the tracking volume. Just beginning to get first results.

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Lumlnoslty x 10"33

Silicon Strip R&D Accomplishments in FY 1991

'Vork on the silicon system is proceeding in a large number of areas, all of which are critical to achieving a system with adequate performance. These areas include: low-power, low-noise, radiation-hard electronics; low­mass, ultra-stable, mechanical structures; low-mass, vibration-free, cooling systems; the development of maximally radiation-hard detectors; and the development of data acquisition and triggering schemes using the silicon.

Major accomplishments to date have included:

1. Demonstration that double-sided silicon detectors will function properly up to doses of 1014 particles. cm-2 , implying 20 years of lifetime at a radius of 15 cm for the SSC design luminosity.

2. Demonstration that bipolar and radiation hardened CMOS electronics will function for the same fiuences as listed above for the detectors.

3. Design, fabrication and testing of a fast analog front-end chip with power consumption of less than 1 m W / channel.

4. Construction of a prototype wick-cooling ring demonstrating the re­moval of heat for hours by a fully passive system (i.e., without pumps).

5. Finite element calculations for the major mechanical elements of the detector satisfying our dimensional tolerance goals.

6. Demonstration of the basic mechanical structure of a detector module, with sufficient rigidity and ruggedness.

7. A first critical path decision choosing 12 cm detector units with a two­chip set (bipolar preamplifier and discriminator plus CMOS data storage chip) as the basic detector module.

8. Completion of a detailed construction schedule and cost estimate for an SSC silicon tracker.

9. Distribution of work among institutions aimed at the production of an SSC Detector.

Pixel R&D Accomplishments in FY 1991

Progress in FY1991 was made in several areas. A complete architectural design was established by Hughes that incorporated the following performance features:

1. x-y storage of smart pixel hits in 32-deep pattern registers;

2. Time stamping of hits in 32-deep content addressable memory;

3. Sparse readout of valid hits in a selected time slice;

4. On-chip rejection of ghost hits; 5. On-pixel storage of analog information; 6. Non-redundant readout of neighbors option; 7. Programmable microcontroller

Two test IC's with pixel size of 50 x 150 f.jm, were fabricated by Hughes to determine behavior of single pixel cells and two-dimensional arrays of pixel cells.

At LBL, an advanced pixel cell design has been pursued. This design incorporates RC-CR shaping, peak sample and hold, DC servos to stabilize operating points, and autonomous operation, requiring no resets or initial­ization. The design incorporates principles that maxi­mize radiation hardness.

Straw-Tracking R&D Progress in FY 1991

Straw R&D • Attenuation lengths have been measured and values

greater than 7 m can be attained.

• Deterioration in radiation environments much greater than 10 years at SSC design luminosity is not a prob­lem with proper choice of materials (copper on kapton is best).

Resolution and Positioning • Construction of 60 channel 2. 7 meter-long superlayer.

Using the chamber achieve a resolution measurement of 120 microns.

• Development of a technique to measure wire position using collimated SR90 source (accuracy: better than 70 microns).

• Wires can be positioned to accuracy of rv 25 J.Lm by enclosing rv 200 straws in modules with carbon fiber shells.

Construction: Two choices under evaluation- modules placed on cylinders or straws directly on cylinders

• Construction of 7 meter-long chamber consisting of 6 straw tubes. There are 8 wire support inside.

• Construction of 100 channel shell-less module.

• Development of the technique of wire tension reliev­ing method.

• Design and construction of 3 meter-long straw plac­ing machine.

• Six 30 em-long 64-straw modules have been built and are under test at 5 institutions.

• A I-meter module is under construction using a shell design of carbon fiber and Roha cell foam sandwich.

• A 4-meter shell has been designed and will be com­pleted by the end of 1991.

Large-Scale Structures

• A conceptual design for a support cylinder, also of carbon fiber foam sandwich, has been achieved.

• A conceptual design for a space frame to support the cylinders has been studied.

• This system has very little material-3.5% X 0 for 4 superlayers-including straws, shells, and supports.

Front-End and Triggering Electronics • Designs for the front-end electronics and trigger have

reached at least conceptual stage. • Prototypes of the preamp/shaper and TMC have been

tested.

Fiber Tracking R&D Accomplishments in FY 1991

To realize the potential of fiber tracking technology, a challenging R&D program has been initiated which includes major development effort in the following ar­eas: (1) high efficiency, low-loss, and radiation resistant fiber scintillators and waveguides; (2) high quantum efficiency, visible light sensitive photon counters (VLPC's) based upon the existing Rockwell Solid State Photomultiplier (SSP1vI) and incorporating associated front end electronics; (3) first-level trigger electron­ics based on ASIC (Application Specific Integration Circuitry) technology; and ( 4) simulation packages capable of characterizing fiber tracking designs. Major accomplishments to date are:

• A number of promising prototype fluorescent dyes which were synthesized in FY90 funding year have now been incorporated into scintillating fibers for studies of fiber efficiency and attenuation length and for manufacture of prototype fiber ribbons. When read out with Visible Light Photon Counters (VLPC-I), these fibers and ribbons provide excellent photon yields. Addi­tional new fluorescent materials have been developed during FY91, and their incorporation into polystyrene have indicated high scintillation efficiency and excellent radiation resistance characteristics.

• The development of the Visible Light Photon Counter (VLPC) has been underway at Rockwell International Science Center. The development has proceeded in two steps. In Step 1 the devices were optimized for visible wavelength response yielding a measured quantum efficiency of ",,85% at a wavelength of 565nm. These have been produced in linear arrays, and have been delivered in significant quantities (hundred channels) to the UCLA group. Highly successful preliminary studies have been performed with these devices coupled to individual fiber elements or to 16 element arrays of fiber ribbons. Step 2 is to optimize the devices for speed and to minimize the infrared response. Fabrication of the first lot of these new devices is in progress.

• A study of cryogenic preamplifiers for use with VLPC/SSPM devices has been initiated in consultation with Honeywell, and studies continue within the collaboration on the development and use of the room temperature preamplifier option.

• Limited engineering studies sufficient for a preliminary fiber tracking system costing have been carried out in collaboration with Oak Ridge National Laboratory.

----------- ----------

• A beam test facility (T839) has been developed at Fermilab in the New Muon laboratory, equipped with a remotely operable transporter to position fiber ribbons and superlayers at various angles relative to the beam. Initial beam studies are beginning now using fiber ribbons and multianode photo-tubes for light detection, until such time as VLPC-II devices are available for beam tests .

• Highly successful initial tests of individual scintillating fibers and waveguides and arrays of ribbons of these structures have been performed using VLPC-I as the photo-detectors in laboratory-based tests. Fibers and waveguides are of 830J,tm diameter, with scintillator lengths of 4m and waveguide lengths of 3m or 4m depending upon the test configuration. When spliced together to form actual fiber detection elements, the total fiber lengths are 7-8m. The mean detected photo-electron yield at the VLPC when the far end of the scintillation fiber is excited by cosmic rays has been observed to be ",6 photoelectrons when the far end of the fiber is mirrored.

Fermilab Beam Tests

The physics Section and the Research Division at Fermilab have provided re­sources to install T839, Scintillating Fiber Tracking Studies, in the New Muon hall. Commissioning has been completed on a darkbox and its transporter, which has b.een designed to scan parallel arrays of 3 m long fiber ribbons across the beam and rotate the ribbons through 70 degrees to simulate inclined tracks. Mechanical mounts and the electronics required to operate a 64-channel photo-multiplier tube have also been prepared, and the detector assembly has been connected to the T839 data acquisition system. Orders have been placed for a second photo-tube, which has a fiber optic faceplate to reduce optical cross-talk.

The transporter includes a fiber ribbon suspension system which provides sta­bility of ±25JLm in relative alignment of four layers of ribbons. It has remote motion control via stepping motors, and position and angle readback have been provided with local displays and analog voltages to be sent to the data acquisi­tion system. The darkbox has been made to accomodate three types of detectors for reading out the fibers: (1) Visible Light Photon Counters; (2) multi-channel photo-multiplier tubes; and (3) avalanche photo-diodes. The transporter was recently modified to accomodate a separate darkbox brought from Purdue Uni­versity.

A high voltage divider, 64 channels of analog amplifiers and delay cabling were built for the multi-channel phototube. A mechanical mount for the tube and electronics incorporates an adjustable interface plate for aligning the optical fibers with respect to the tube pixels. Noise spectra have been recorded for all 64 channels of the system. Detailed studies with a radioactive source have demonstrated the single photo-electron resolution capability of the tube.

Next year's R&D aims at:

(1) Finishing proof of principle for remaining unique areas critical to tracking system.

(2) Work needed to complete the design to al­low further cost estimation and confidence that our contingency estimates are correct.

(3) Work needed to remain on schedule for 1999 installation. This is already very difficult!

TABLE 2: FY 1992 SILICON TRACKER R + D COSTS

TASK GOALS PROTOTYPESITESTS COST$K LABOR MATERIALS TOTAL

TECHNICAL ~AGEMENT o PREPARE PROPOSALS, BUDGETS & OVERSEE SCHEDULE $30 $0

WECK Et-G. MANAGEtJENT o PREPARE PROPOSALS, BUDGETS & OVERSEE SCHEDULE $60 $0 PROPOSAL SUPPORT o ELABORA TlON OF DESIGN FOR PROPOSAL $100 $0

SUBTOTAL (PROJECT MANAGEMENT): $190 $0 $190

DOUBLE SIDED DETECTOR o FABRICATE OOUBLE SIDED OETECTORS WITH FIELD o COMPARE CAPACITANCE & RADIATION RESISTANCE $0 $60 DEVElOPEtJENT PLATE ISOLATION OF FIELD PLA TE AND P·IMPLANT ISOLATION

DETECTOA MJOUlf o COMBINE DETECTORS & FRONT END ELECTRONICS o TEST RADIATION HARDNESS & CROSSTALK $170 $50

TO INDIVIDUALLY TESTABLE MODULES o TEST DIFFERENT SHIELDING TECHNIOUES

CABLES o DEVELOPE LOW-MASS CABLES o TEST NOISE ISOLATION CABLES $40 $40 o LAYOUT CABLING PLAN o TEST POWER BYPASSING

BIPOLAR FRONT END CHIP o DESIGN, FABRICATE & TEST CIRCUIT BLOCKS o TEST RADIATION HARDNESS, NOISE, TIME WAU<, $270 $125 o DESIGN, FABRICATE & TEST FUll MULTICHANNEL POWER CONSUMPTION, & DEAD TIME

ARRAY

CM)S DATA STORAGE CHIP o DESIGN, FABRICATE & TEST TEST CIRCUITS (MOSIS) o TEST RADIATION HARDNESS $230 $115 o DESIGN & FABRICATE FUll SIZE RAD HARD CHIP o TEST DIGITAL TIME STAMPING & DATA BUFFERING

o TEST SPARSE SCAN REAOOUT

SUBTOTAL (DETECTORSIFRONT END ELECTRONICS): $710 $390 $1.100

I-' (Xl

TASK conl

COOUNG RING PROTO"NPE DEVELOPMENT

SIUCON DETECTOR MXlllLE

WICK DEVELOPMENT

AUGNMENT/STABIUTY MEASUREMENTS

TABLE 2: FY 1992 SILICON TRACKER R + D COSTS

GOALS PROTOTYPESITESTS

o DEMONSTRATE FABRICABIUTY o TOOlING PROTO"NPE-COM'RESION MOLDS WITH 120 CEG. ARC SEGMENT o GIE RING PROTOTYPES

o ACHIEVE THERMAL CONDUCTIVITY o MATERIAL PHYSICAL SPECIMENS TESTS ENHANCEMENTS FOR EUMNATING o FULL RING ASSEMBLY (120 DEG. SEGMENTS) EXCESSIVE THERMAL GRADIENTS

o ACHIEVE TAILORED GlE MATERIAL PROPERTIES - LOW MOISTURE ABSORPTION

o DEMONSTRATE CONSTRUCTION OF EDGE- o TOOUNG PROTOTYPE-VACUUM CHUCK BONDED SIUCON LADDER ASSEMBLY HOLDING FIXTURE

o DEMONSTRATE STRUCTURAL INTEGRITY OF o THERMAL BEHAVIOR OF ADHESIVE UV CURING MODULE USING ROOM TEM'. CURING PRODUCTS ADHESIVE FOR FACILITATING HIGH o STRUCTURAL COMPONENT TEST

PRODUCTION RATES AND MINIMIZING o MODULE RADIATION/MATERIAL INTERNAL RESIDUAL STRESSES COMPATIBIUTY TESTS

o DEMJNSTRATE MATERIALCOMPATIBIUTY USING ACTIVE STRIP DETECTOR

o PRODUCE SUFFICIENT ~ULES FOR 120 000. ARC SIUCON SHELL AND FULL SIUCON PROTOTYPE SHELL

o COMPLETE INVESTIGATION OF o TEST VARIOUS POLYSTYRENE WICK THICKNESSESI POLYSTYRENE GEOMETRICAL SHAPES • THERMAL RESISTANCE MEASUREMENTS o 120 CEG. ARC WICK SEGMENT • TRANSIENT BEHAVIOR TOOUNG PROTOTYPE

o PRODUCE 120 DEG. ARC SEGMENT WICK o CONDUCT 120 DEG. ARC COOUNG RING TESTS W/ARTERY o CONDUCT 120 DEG. ARC SIUCON SHELL

o UPGRADE WICK FACILITY TEST TO PROTOTYPE TESTS ENCOM'ASS TEST OF FULL SIUCON SHELL PROTO"NPES

o DEVELOP AUGNMENT/ASSEMBl Y CONCEPT o OPTICAL AUGNMENT UNIT COMPATIBLE FOR PLACEMENTtBONDING SILICON WITH OPERA TOR CONTROLLED MECHANICAL DETECTOR MODULES ONTO 120 CEG. ARC SHELL ASSEMBLY ANDIOR FULL SHELL PROTOTYPE o MElROlOGY-UKE MEASUREMENTS

o DEVELOP MEANS OF MEASURING SIUCON DETERMINING STABIUTY OF SIUCON STRUCTURE STABIUTY TO <5 MICRONS STRUCTURES AND COMPONENT MATERIAL

o DEVELOP AUGNMENTISTABILITY MEASURING PROPERTIES TECHNIQUES SUITED TO ANY GEOMETRY, NOT o ENVIRONMENTAL CONTROL CHAMBER FOR "RESTRICTED TO SIUCON BARREL" GEOMETRY COMPONENT TESTS AND MATERIAL TESTS

COST$K LABOR MATERIALS TOTAL $160 $95

$160 $90

$200 $80

$250 $100

TABLE 2: FY 1992 SILICON TRACKER R + 0 COSTS

TASK GOAlS PROTOTYPESITESTS COST $K conl LABOR MATERIALS TOTAL

CENTRAL REGION o DEVELOP OPERA TOR-CONTROlLED o PROTOTYPE TESTS Of OPERA lOR CONTROLLED $116 $75 PROTOTYPE MECHANICAL ASSEMBLY UNIT FOR SILICON MECHANICAL ASSEMBLY UNIT FOR SILICON

DETECTOR MODULE ~DULES

o ASSEMBLE 120 DEG. ARC SILICON SHELL UNIT o CooUNG TEST OF 120 DEG. ARC SHELL ASSEMBLY

o DEVELOP KINEMA TIC ~UNT SUPPORT o PROTOTYPE LOW-MASS, LOW-Z KINEMATIC $124 $20 FOR COOLING RING/SIUCON SHELL ~UNT

STRUCTURE

o BUILD COMPLETE SIUCON SHaL ~DULE o CONDUCT STATIC STABILITY TESTS $130 $55 o DE~NSTRA TE SIUCON DETECTOR M)DULE o FRAGILITY TESTS OF PARTIAL SILICON SHELL

PLACEMENT TO 25 MICRONS ASSEMBLY

SUBTOTAL (MECHANICAl): $1,140 $515 $1,655

GRAND TOTAL: $2,040 $905 $2,945

FY92 STRAW R&D

TASK GOALS PROTOTYPESfTESTS ,

COST ($K) LABOR (MY) MATERIALS TOTAL

Drift Cell R& D -Develop wire support Wire supports 2.00 35.60 132.80 -Develop resistive Resistive terminators termination Straw bundles -Develop fabrication techniques

Endplale and Electronics -Develop crosstalk-free Endplates 0.50 24.80 49.10 Interface R&D connection from wires to Wire connectors

electronics

Straw Placement -Establish feasibility of 4 meter non trigger modulE 2.00 100.00 197.20 Structure R&D, Alignme precise straw placement 4 meter trigger module

structure or -Establish alignment 8 meter straw placement techniques -Establish fabrication technique and cost

Detector and Electronics -Establish operating Test prototype straw 0.50 105.00 129.30 Evaluation condition with electronics structures with Qfoto!yQe

[prototypes electronics

Aging and Radiation -Determine lifetime of Test prototype straw 37.00 37.00 Damage Studies tracking system at SSC structures with radiation

-Choose materials and/or high currents, rates

Travel -Attend meetings 1.54 75.00

Totals 6.54 302.40 620.40

Page 1

Fiber Tracking R&D FY92

Cost ($K) Total

Scintillating Fiber Development dyes 50 polymerization 25 claddings 25 preforms 50 fiber drawing 50 radiation and environmental studies 50 measuring fac.ility 50

300

Ribbon Fabrication winding, laying structures 75 adhesives, material studies 25 splicing techniques 75 measuring facility 50

225

Mechanical Engineering Engineering liaison 50 Environmental controls,

light tightening techniques 50 100

Trigger / ASIC 120 Readout R&D

VLPC refinements: 245 Removal of IR sensitivity, Improvement of speed, Preamplifier Integration

Readout Engineering VLPC cassette/canister 250 Bench test of VLPC 80 Preamps for 1000 channels 80 Cryo preamp R&D 80 Cryo system issues 50

540

Grand Total 1,530

SOC mech RID Sept 25

FY92 Mechanical Engineering Funding Profile Sept. 25.1991

For Outer Barrel Tracker (Iteration 4) A.T. Goshaw

I Calegory 1: Proof of Prlncipre

Ta.k I Reccomended soc budg.' (KS) Comment. support cylinder design 60 tests of composite structures. cylinder l'rototy~ 150 Use an Ixisling mandrel. alignment methods 75 module development or straw placement machine 60 Assume. only one straw placement pr~ure. fiber placement 70 Assume. both straw and fiber R&D in FY92.

Catagory 2: For SDC Proposal Task J Reccomended SOC budge'lKS)

assembly and manufacturing concepts 75 Onl design for proposal. support structure design/analysis 90 structural flange design 50 tooling and fixture design 60 end plate and utilities 50 Ne.d 10 clarify overlap with Integration fundir

summation of catagor'e. 1 and 2 740

I cosUng and prolect mlnagemenl for proposal 150 This anum" thl mechanic.' engin.ering

I budglt musl support cost and schedule lolal mechanIcal engIneering for FY 92 .,0 preparalion for Ih' proposal.

I Comments:

This budget Is based u~n Information~rovided by David Vandergriff and Roger Swensrud In response to the first Iteration circulated on Sept. 9 and a second iteration circulated on Sept.1l. In addition It was reviewed by the outer tracking meehank:al engineering subgroup on Sept. 25.

Page 1

Conclusions

(1) Excellent progress is being made on the relevant track­ing technologies.

(2) Time left for R&D is about two years, so must dur­ing this time finish design, including very sophisti­cated engineering, and construct modest-sized system to refine concepts, check performance, and demon­strate robustness on the system level. Extremely tight schedule.

(3) Need significant financial support to complete the critical R&D and move forward to construction.

J. Bensinger

PAC Meeting October 3-4, 1991

Goals for the SDC Muon System

1. Good resolution, redundant measurement at low Pt and primary measurement at high Pt.

2. Good track pair resolution.

3. Accept particles at large angles without loss of resolution.

4. Wire spans of distance up to 9 m.

5. Chamber pairs have wires that accurately project to the interaction point.

6. There should be a minimum of dead space.

7. Robust design.

8. Easily industrialized.

9. Relatively inexpensive.

SDC Muon Group PAC October 3, 1991

FY92 R&D Plans for the SDC Muon Program

1) Concentrate on the "critical path" items. Engineer systems - building meaningful prototypes in FY93.

• Complete full length prototypes and choose chamber design by February 1992.

• Proof of Principle - Design Super Tower Prototype

• Development of Global Alignment System

2) Secondary Goals - Limited Effort

• Forward Region

• Trigger Systems

• Readout Electronics

• Develop Installation Tooling and Techniques

• Plan for Chamber Production and Assembly

• Develop Facilities Plans

3) Toroid Magnet Design

• Barrel Toroid Design

• Magnet support system

• Forward Toroid System

• Coil Design

SDC Muon Group PAC October 3, 1991

~ 9~2 R&D Progam for the SDC M~:~ Group

Milestones 1 9 9 1 1 9 9 2 r-------------~--------------------------~ soc Muon Group J A SON D! J F M A M J J r-------------I-------------------~

A s o N

Barrel Chamber Development ....... ."-.-:: .. --.... -.".'---.. ~"-.-.-.......... --...... -Complete Full Length Prototypes < .... 1 ; ..). . ; . . .

Cell & Chamber Decision ......... ; ......... ~.-.. ·······r······~···-···-········~·······<>·····.······;· ........ 1"' ...... ., ......... :.................. ..........-

J--Ce-u-Redes---ig-n--------I·· .. ---- · .... · .. r .. · .. ··j-... -· .. •··· ...... l·····¢ .. · ... : ......... • ..... ·6 ..... ·; ..... · .. ·~ ............................ ; .. _ .. .. I-----~-------......... -.~ .... ---.;..--... ········t·········~·········-·········~·······-·:····· .... ~ ......... ~ ......... ~ ........ ~ ......... ; ......... ~ ................ ~--..

Supermodule Redesign i ; .: ¢.. <> ~T=r=i:=:=:=r=:=o=:=~=~=e=rs=rt=R=ed=:e=s=ig=n=====:f-··---i-'=====:; T----fI~I:f1-... ----+: --:!.. .... >-. --·,....--.. --F

...... .... Design of Counter < :J >.

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Forward System --~--;--+--+I-4--~--:: f-····- i I ! ! ~---~--------4--....... --.. --;-+--.....;.--'-. ·_··_+·--l--t-'-' , ; : 1 • ; I >

Single Wedge Prototype : : ! ! : I I Cerenkov Optics Design

Test Beam

Muon Studies

Chamber Tests

Magnet Development

Barrel Toroid

Suppon Structure

Forward Design

Coil Design

,: I I : ! : : , ! 1 : : : : .-1 I i ~ . ~~.~.-.i---+- ~ ; ~

• • -J·· .. ····f··u· .. ··1·· .. -···~···-·····t·-·-· ~·--·····+·· .. ·· .... ·t-·-····~··· .. ···+···· .. ···!······ .. ··+ .... - ·fo <

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•

1 fi.Ox2.0 sqcrn SDC Drift Tube (SDC-(l-l) Ar - CF4 - CIl4 90-5-5 10 SEr 91 HIIN

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, I " , -~ I

~ #< : 50 nsee () : 250 nsee

cond. s t rips: 4.15mm spaces: 4.00nun

(,110 v

,----------- -------------, ( I, " , "'d I( I v I,HO()v 1,200v )hOOv )O()Ov 2/,UOv 1800v 1200v 600v Ov

-- --.r- _ ....... - .......... -- __ --._.. __ ,..--__ •

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Parameters 0

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2

1.6 em, 2.0 mil,

1.6 cm. 5.5 mil 90-5-5

1.6 cm. 5.5 mi 50-50

SDC. 5.5 mil, 0-5-5

3.5 em x 3.5 m . 5.5 mil. 50-5

2.5 3 3.5 4 Voltage (uncalibraled kV)

IC,-«c~) - XC sa.If,.at) M = tA(",,) - CH0i5)l- 2'U, e -

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91.07.27

Slanted Jet cell partitioned with stiff cathode plates placed in a rigid box frame

Jet Cell Chamber Module

Theta

Theta

To J.P.

3 sense wire Jet Cell

3 sense ,,·ire Jet Cell

Cell Structure

Ground (0 V)

• ~ Guard (-+ 31<V)

4 em" 0.0.::::- Potential OV)

/~em (;:3 )

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( "- - 3 t<V)

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side fralne

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u _____ --

---

SUPERMODULE COMPENSATION CONCEPT THETA AND STEREO TUBES UNDERGO CYLINDRICAL BENDING

PHI TUBES TRANSLATE AS APPROX. STRAIGHT GENERATORS; MAY NOT REQUIRE COMPENSATION

I I

I I

--------- -------t---STEREO

STEREO AND THETA MOVABLE BULKHEADS TRANSLATE SO AS TO ZERO (OR BIAS) WIRE SUPPORTS

1.0 meter PHI t _!..'!~TA ___ .. - '--,-_ -==---~~-~--~

~lmm 8.69 meter -I 9.52 meter

BW3 GEOMETRY

If. ~.

PROTOTYPE BOSTON CHAMBER DESIGN

1

H~''''blt 8uIU,.-,( l'l·) fi lI~d J"IU.,.ri (I,)

SUMMARY OF ALIGNMENT SYSTEM CHARACTERISTICS

- REQUIREMENTS: SIMPLICITY, RELIABILITY, ACCURACY, COST

-SOLUTION: • NULLING CONCEPT USING LEDn..ENSlDETECTOR TO ALIGN TWO BULKHEADS W.R.T. END PLATES •

• ASSUMES THAT BOTH SOURCE AND DETECTOR POSmONS ARE USED AS REFERENCE.

100 001 BASIC BULKHEAD ALIGNMENT CONCE ....

END REF._1 BULKHEAD_1 BULKHEADft ENDUF.G

.-LED

~ []

I (J) []

QUAD CELL LENS HOLE

[]

~ • [] LED

I QUADCltLL

HOLE LENS

I I

I , , I

I I

I I

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I

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Muon tracks I

I , , , ,

Second

Assembly sequence

r;IZIIlZI ...... .

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HS

~ HS

End views

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Test Beam Program

1) Study of debris associated with muons in an absorber.

• Dependence on muon energy.

• Dependence on material.

2) Measurement of neutrons produced in a calorimeter.

3) Detennine the effect of accompanying debris on track reconstruction and resolution.

4) Cerenkov counter test.

5) First data run - October 3, 1991.

SDC Muon Group PAC October 3, 1991

nllllh

rllIl

of

E66S

Ippl-

III us

"Clean

Room"

Area

c8> 0 IrI',,1 . ~ 0 r'''J ~114 IrI'--lJ~..JI"'-1 __ r--------~--------------------~ I I I

I I Cercnkov Counler

I I I L ___ ~ale~~~ ______________________ j-________ .

---------------------------------------------------------1I .. ln~--------~----------------~ ~~ designaled walkway (black/yellow)

El magnel (lransfonncr cores) (drawing nol on scalc) I \Y

drifl chambers .+N I Floor 1"8n ofT816 Setup concrele blocks Location: New Muon Lab

0 gas cylinders U. Oralzlcr. U.W .• 1/lfJl .. " --- lence

T816 Tests of Prototype ::\1uon Chambers

• Overall Efficiency

• Effy vs. Drift Distance

• Drift Distance vs Time - How Linear?

• Spatial Resolution

• Spatial Resolution vs. Drift Distance

• Hit Multiplicities (6-rays)

• Two/Multi-hit Spatial Resolution

• Noise Immunity/Stability/Reliability

• Angle Effect(s)

• Performance vs. Gas Type(s)

• Wire Aging vs Gas Type(s)

4 J 2

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sse ----. ......... ..------..... . ---PROPOSED

SOC SUPPORT eFRONT VIEW - HALF BOTTOM.

R10000181

- ,.... "

o

c

B

A

RETURN

SUPPLY

4 I J .. 2 I I .. -.. -...... .~, .. •• ,, T· ...... ••• I I I I I

o • 11480 ) ,- 29600 ~ - o

/. ."'.. ~J [1-/r SHORT BLOCk ~~ -- ,-~ 1-

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...... ................. -_ ........ ~ ... --,.., ..

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A .1 •• ...... ~ .. ~ CONCEPTUAL DESIGN A

[~ ",".

"'" ~ --I- R20000]c)61' ~ ..... .. , ..... -- .T , .... '; .. _- "' -"\ca,. _Il' IoIOO«oe'" ..... .... 4 1 , • - I

A. Lankford

PAC Meeting October 3-4, 1991

SDC FRONT-END ELECTRONICS: OVERVIEW OF STATUS AND R&D PRIORITIES

Status: Development of critical custom IC's proceeding well,

but no complete proof-of-principle yet. Significant work remains.

Preliminary conceptual design reports exist, and have been reviewed, for nearly every front-end system.

FY92 R&D Priorities: Complete proof-of-principle of critical IC's

for each detector subsystem. Perform system tests

to demonstrate requisite performance, particularly in face of digital/analog crosstalk

in a many channel system. Complete conceptual designs of all systems. Initiate development of support IC's

common to several of all systems, such as programmable delays, data collection,

clock drivers, etc.

Impact of budget: Proof-of-principle for some critical IC's will be delayed. Full system tests will not be performed this year. No funding for support IC's.

Overview:

SDC STRAW TRACKER READOUT (Penn, KEK)

Preamp, shaper, discriminator, data buffering, formation of trigger primitives, and data collection circuits are all mounted on chamber endplate. Packaging of this electronics is challenging.

FY92 R&D Tasks: Preamp/shaper/discriminator:

Integrate preamp/shaper with discriminator. Layout and fabricate 8-channel ASD.

Data storage and readout: Convert TMC to rad hard process if necessary. Extend TMC pipeline Complete development of TMC/ AMU prototype. Conceptual design of

Level 2 Buffer (L2B) Data Collection Circuit (DCC)

System: System tests for digital/analog crosstalk. Study packaging for mounting on chamber,

e.g.: hybrids, silicon-on-substrate Refine system conceptual design.

Support chamber tests with ASD's.

Impact of budget: Slow ASD development. Eliminate support for TMC/AMU. Limited support for system tests.

Straw· , of 256

Termination (COSIS in Mechanical PaclUlge)

DiSC;

HVBus

To Trigger

It •

Sig"al/Power Unes in "Module CaDle

HVln

Gnd In •

LV In

Figure 28: Block Schematic of a Straw Readout Module. Note that in this cue we are describing a system with t.he atraw anode at posit.ive HV, it. is also p088ible t.o operate t.he anode at ground (or near ground) potential and use a negative HV on the cathode. The negative HV scheme has Borne advantages in terms of the number of required HV capacitors per module but may have some disadvantages in terms of increued sensitivity to breakdown. Until further work is completed on both possibilities, we have chosen to describe the positive HV scheme both because it is somewhat more conservative and because it is, perhaps, a t.riBe more obvious to the reader.

30

+

Straw Tube

Detector

FEB

.

Chamber WaY

·600 boards ( <256chIboard) .

Front End Board ,---------------\ I HybridlC ,.... I I 8 bit "----------------. bus

·32 -r""- Data Collection . -,--------------- Chips ,

4~ TMC..... Level2 ~ •• , 1 Buffer I -2 MBisec

\ - -\. - =-=-=-=. - - - - - - - , \

135.000ch

• • • • • • • • •

Detector Wall

Local Buffer Crate (8 crates x 2 sides) ... - - - - - - - - - - - - - - - - - -I 1 1

--~---------------- 1 • -~-----------------• • 1 1 1

• 1 I I 1 1 1 • 1

~ I 1 1

• I I 1 • . Data • 1 1 1 • " . Transmisson • I I 1

• . I Multi Module , 1 •

E V E N T

B U I L o E R

10 1 1 Data (OTX) 1 -......

Buffer . i - 1 (MOB) • 1 • • 1 • 1 • • 1

. . 1 , , I I • 1 ,---

1 1 10

• • --------------------10w,p. - 1 Gbps

Fig.1 Data Flow Diagram of the Straw Tube

:--;--T----": __ I i--~tte!~ .. ooj:.'!---l~l.r _._ .. -r- ~ .~.- _at 0.1; . ; : i - t • e. .-...-.--.---..,,---!~.-t'--":"-- 1_,

~ • ; I I ~ : 1 I 10 " Me l ~ __ ., !'or...L I _,

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. I i l • , ·1 4 : ~ > ----'---±:-f.; ~ \ t •• ' ..I. • J __ L __ ~ . .' .. ............. + •• -.;.- ••• ~ ••••• : ........ .; ••••• ~ •••••• -•••••• . , .; . .. .. 28mV· -"---'-'-,

0.0 -- - _. ----. -.. ~.-. __ ... __ J ..

-50 o SO

Time (" tee) Figure 10: Signal from 2 meter .traw tube filled with CF4 The waveform thow. the output of the prototype amplifier attached to a detector tail cancellation circuit.

150

100 (/) -c: ::J o

(,)

50

cr = 0.52 ns

o~----~~~~------~----~~~--~--~ - 2 - 1 0

Deviation ~tr (ns)

Fig. 11 Time resolution measuremenL The deviation from ideal line inCludes both the digitizarion

error and the TMe CIrOr.

ci. ~ 8 -~ u -5 .... o

1 o ... o f C"i -

100mm DDD DDD DDD

D

Active Silicon

Connector to FIFO BOll

Straw Ends with HV Decouphng

3-6m

HV Cable (TP)

~ DO

DD DD

D 120mm_

Permanentlv Attached Cable to FIFO BOll

~---I-------I I HV Connection to .-- FIIFO

Figure 29: Approximate layout of the electronics module and attached cable.

36

(a)

i 15 mm

~

(b)

1 29.4mm

90mm

.......... ---- 42 mm -----.,.

TMC

D L2B

D P/S/D

D

..... 1---- 33.4mm/64ch-.

4 mm~

HV Capacitor

-t*-........... -4mm

••••••••••••••••• •••••••••••••••••

8ch Hybrid IC (P/S/D+ TMC+L2B)

Data Collection Chips

Cable connectors or direct cable attach

Fig. 12 Mounting Example of (a) the Hybrid Ie and (b) the Front-End Board.

CI Fermilab SDC~

Sci-Fi Tracker Electronics Current Status

YLPe Readout:

1) Working with Rockwell to specify signal levels, pulse shaping and cryostat design

2) Approximately 256 channels of prototype amplifier/shaper/discriminators of various

designs, including a GAs cryogenic version.

3) Crosstalk measurements of amplifiers and cables underway.

4) Conceptual design ofLl, L2, storage and track finding ASICs.

5) Conceptual design of tracking readout board and trigger interfaces.

6) Mechanical, cooling, power design for tracking crate and VLPC cryostat proceeding.

Test Beam:

1) 128 Channel fiber tracking readout board with Ll buffer and track segment finding

included, being fabricated. This will be used to study tracking algorithms.

2) 128 Channel test data source at 60 Mhz being fabricated for test fixture.

1) Segment fmding test of algorithms in test beam.

2) Simulations of trigger with various super layer structures to study efficiencies.

Detector 368,640 Sci-F'

--

7/16/91

SDC Barret Fiber Tracker Block Diagram

1 ...... -----------1------------

1 E=====!J..'·. i I I I I

I I I I I I I I I I

~

rr, -----_II I r:r:-----_I ,

Cryostat

I r,---' I'r;---' '" I 'I •

"" 1 I • '" 1 • • 'U ----I -.

Cassette I

I

640 I

I I I

--r--i VLPC I I I I

I AMP I LJ: I 128 I DISC . ~,-,,-..--,,-

VLPC's 64 Cryostats

2880 CasseUes 128 Channels/Cassette

L ___ Neighbor_ExcbanJ! ___ J .~

-Lndl (48 Storage " '-­SeameDt Findtr .-

VME Interface

Track Segment Lluer and Pt Code ASIC's

I I I i • I I I

DAQ I and

I Trigger I System I I

ASIC's _ ~ 1 Trigger Pt

10-----1--... Codes ror i Stiff

D

Tracking FE and Readout Boards 64 Crates (9U x 400 with Earcards)

576 Boards (9/Crales) 5760 Ll Storage and Segment Finder ASICs

3456 Segment Linker ASIC's

I Tracks

SUPERCONDUCTING SUPERCOLLIDER (sse)

32 CHANNEL VLPC~ MODULES ~ 4 PER CASSETIE

FIBER OPTIC mBBON CONNECTOR

~ SHEET METAL HOUSING

OPENINGS IN BOTIOM OF HOUSING PERMIT HELIUM GAS TO FLOW THROUGH CASSEnE

O.A. COLD AMPLIFIER

ADHESIVE CONE END OF EACH .... ASSY) FIBEA OPTIC

CLAMP

4 OPTICAL FIBER

COLD AMPliFIER ASSEMDl Y 4 REOUIIlEO

FIBER OPTIC BUNDLE

·RIBBONS PER CASSETIE~

ELECTRONICS OUTPUT/POWER! --I't-tlllI~D~ll..l TIMING CONNECTOR t PER CASSETIE, 32 PER CANISTER

TAPE CADlE EXIT fROM CARRlEn

[ __ SIIEET MET Al

./ HOUSIUG

VLPC ELECTRONICS CAssene ,,28 CHANNElS)-_

,.."nn"n .. e:: AT C:INI( InPFNINr:o:; IN AonOM --.-

U1 .-C Q) > w ~

0

\,..

Q) n E :J

Z

------ - ----.. _ .... ---.

50

45

40

35

30 -.

25 -

J1 20 -

15 I 1 0

5

() ___ . ____ 1_ J _

1111111

I. II '[JI r) I LlIIIII fI L

4 fl I 2 1 (j :~ () 2,1

Number of Photoelectrons N

I I I /I

211

~3 r d I. Cl Y P l' I I' i g g ere d h Y I Au 1 I aye r s

C '" : ~ III S Ii'.: ~ ~ . :)' 11

.. , f

Fermilab SDC~

Scintillating Tile - Digital Calorimeter Current Status

PMI's;

1) Studying candidate PMTs, evaluating perfonnance,gain, MTBF, etc.

2) 128 Channel test data source at 60 Mhz being fabricated for test flXture.

1) Prototyping tube bases to study noise issues associated with charge pump base.

2) Designing sinusoidal charge pump base.

3) Investigating manufacturing techniques to decrease cost of PMT bases.

ASIC Design;

1) Current spiltter ASIC, prototyping underway at Orbit Semi. Tests will be completed to

see if this fabrication is adequate for our needs. First pass chips due in any day.

2) Gated integrator is in conceptual design and will eventually be part of same ASIC as the

current splitter. Parts of circuit have been tested.

3) FADC tests have been made with an 8 bit FADC operating on the same circuit as the fast

amplifier with noise at less than 1 bit (6000 electrons).

4) Adder ASIC, design underway with test submissions to Orbit and partially functioning

chips returned.

S) Calibration look-up and L1 storage ASIC, conceptual design underway with layout of

some custom cells already complete for testing.

Test Beam:

1) Proof of principle Adder tree board is being constructed which will have 16 inputs each

having an 8 bit mantissa and 4 bit exponent

2) L1 storage, a prototype board is being assembled which will provide digital pipeline

storage for 16 PMTs.

Impact of budget on digital calorimeter readout: Support only for development of current

splitter/integrator IC.

Impact of budget on sci-fi tracker readout: Support only:

Refinements to VLPC Conceptual design of analog and digital electronics.

SDC CALORIMETER READOUT with SWITCHED CAPACITOR ARRAY

(LBL)

Overview: It is contemplated that a single front-end board will

contain all the following functions: signal amplification, storage pending Ll/L2 decisions, sums and primatives for the Ll trigger, control, clocks and time synchronization, calibration, and high-speed readout.

We especially need to demonstrate the analog store concept in the noisy environment of a circuit card with a large number of channels.

The performance of the IC's will continue to improve with the available technology, and we intend to continue iterating on the current designs in order to acheive the fundamental limits and fully exploit the limits of this technology.

FY92 R&D Tasks: System conceptual design and engineering. Design and simulation of amplifiers:

preamp, delay-line shaper, split-scale drivers. Continued development of architecture chip (ALP). Improvements to SCA:

linearity, op amp, input protection, receIvers, continued refinement.

Completion of ADC: improvement, multichannel verSIon, integrate wI SeA.

Board/system tests.

Impact of budget: Reduction in technical support (chip testing, technician). Defer work on amplifiers. Slow down SCA and ADC work.

Integrator wi

Baseline Restoration

DYNAMIC RANGE 50~V = 20 MeV 5.0V = 2.0 TeV

~ ~II~ 16·50n5

x32 Gain 256 deep buffer

62Mhz ADOR '2·bit Digital Control

& Buffer

Fig. 1.4. Shown in the figure is a conceptual design for an sse calorimeter front end electronics architecture. Signals are preamplified. shaped. split into high and low-range channels. and then stored during the level 1/2 trigger decision in an analog memory. After a Level 2 accept analog data are digitized and readout.

5t111/18£A 0 45016EA EC

FRONT END CRATE FOR CALORIMETER AND SHOWER-MAX (1 OF 96 CRATES SHOWN 64B AND 32EC)

TO LASER TRIGGER <)

280£'\ 0 400£.\ £C r --, 8 , PM L __ J

mGII/LOIf RANGE ANALOG SIGNALS

ClOCK

" TRICGERS

VME

DISTRIDUTION

\ 350 OR 50£C

CAL PREAMP

& flV CONTROL

2/PM

I CARD . r------, : PR~~~~~ORrf---------------~C> COM~~:~~~!ION L _____ J

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.---~I TRIGGER I I DIST & I I TEST PULSE ,<:J

r--f----'L _ ~~N!~~ _ J I GOIT/SEC FIDERS C> TRIGGER CONTROL

I CARD CAL DATA

} DATA CAL REQ

COLLECTOR SM DATA

TO/FROM EVENT & DUILDER

BUFFER MEMEORY S~I REQ

18 + 51'1 LINES + I __

CARDS LINES + I 30 OR SEC

CALORIMETER 10

SCA CARD I GDITS/SEC

192 PER FIDER LEVEL I TRIGGER

CALORIMETER 10 (30B OR 50EC FIBERS)

SCA CARD 350 / I----+-+----i<--____ --'

} TO CALORIMETER

35D OR 28EC 18/PM

OR 50EC CARDS

3D OR 3EC

CALORIMETER SCA CARD

r - -, 18 , PM

SIIOWER-MAX I--+-t:t--I-II--:-::~L~~~~ PREAMP I

& 192 . I GDITS/SEC

PER FIDER

}

TO SIIOIfER-MAX L __ J

flV CONTROL 588D

OR 450EC

35D OR

50EC

PA R/If CONTROL ~ '----~---f 700 OR 78EC

~--r ()C

I r-----l L -I /IV OIST 1- - -

L ____ . __ J

CALORIMETER 2

LEVEL I TRIGGER (8D OR 8EC FIBERS)

SCA CARD ~------~L---------~c>

CARDS 5 BACK OF CRATE I CRATE SUPPORTS (PM TUDES)

R/W ~ USED SCA CARD

E"CTENSION BARREL CAL 288 280 3

50 OR 5EC END CAP CAL 480 400 5

DARREL SM 578/18 566/18 3

rowEH J= Ae END CAr SM 576/16 450/16 3

Figure 4.3

tv o

Page 23

CALORIMETER PREAMP AND HV CONTROL CARD

PM HIGH VOLTAGE

C ~

S ~ ATHODE ?

1 s ~ PREAMPLIFIER -:;:-

YNODESH CONTROL SECTION WITH DAC'S AND

D

. · CONTROL REGISTERS · . ·

1 --1 VOLTACE L DC

8 I /

REGULATOR I ~

ANODE '7 17 HV MON

~ CURRENT MON JV\I' MUX L..-.c:o ADC ~

V RECULATOR 32: 1

MONITOR ..

[ .J\,/\,v ........... r; r--- X32> LOW RANGE

'/ ---1

1 ./\f\

...........

-F1 g '-- Xl> HIGH RANGE

'/

q ?

'*' DC AA Vw

y TEST PULSE STROBE

":" 1 OF 8 PM'S, HV REGULATORS AND PREAMPLIFIERS SHOWN

Figure 4.4a

I

01 FROM HV STRIBUTION

- PA R/W CONTROL

PM SIGNAL > TO

SCA CARD

ANALOG SIGNAL FRO~I PM

PREAMPLIFIER

S

CARD SLOIf

V'Ic:. ~ BUS

TRIGGERS

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\Vhy pursue two approaches to calorinleter rcadout'?

Technical challenge: 17 -bit dynamic range (1: 100,000) simultaneous read/write operation ("deadtimeless") cost for large systems

Neither approach has been fully demonstrated. Each has different uncertainties.

switched capacitor approach proof-of-principle nearly complete

splitter/integrator approach potentially more robust

Potentially different system costs.

Next review of alternatives will take place in December 91 or January 92. A choice will be made at that time if appropriate.

SDC MUON FRONT-END ELECTRONICS (Harvard, Michigan)

Overview: Chamber-mounted and base-mounted electronics

provide amplified and discriminated signals to nearby crates which buffer and collect data for readout and- which form trigger primitives. Design will likely use ASD's & storage IC's developed for straw readout. The organization of the readout is strongly influenced by the trigger requirement of combining information from counters and multiple chamber planes at Level 1.

FY92 R&D Tasks: Develop complete conceptual design of subsystem. Evaluate existing preamp and amp/shaper/disc chips. Prototype card with Penn ASD chip. Design and fab CMOS test pulse chip for calibration. Design and fab low-power CMOS cable driver

to link ASD cards to trigger/readout crates. Support chamber tests

with ASD cards and high voltage distribution. Conceptual design of trigger/readout crate.

Impact of budget: Slow down development of analog electronics.

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5

SDC TRIGGER: OVERVIEW OF STATUS AND R&D PRIORITIES

The highest priority goal at present is definition of a credible trigger system design and of critical path components.

Conceptual design tasks requIre strong engineering support

Status: Ongoing studies

of pipeline length and front-end control. Physics simulations underway. Preliminary conceptual design complete for Level 1. Many key components under study or in proto state.

FY92 R&D Priorities: Simulation; define conceptual design. Complete conceptual design; define building blocks. Launch development of key components. Define inputs from subsystems, data paths, control.

Impact of budget: This important area will not be able to accelerate its

progress as needed. Development of key components will be slowed. No resources are available to support development of a

complete conceptual design or key components at Level 2 once Level 2 requirements are defined.

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8

SDC TRIGGER SYSTEM ENGINEERING (Chicago, Wisconsin, others)

Overview: A preliminary conceptual design of the trigger system

has been prepared. This includes a summary of the trigger requirements, overall architecture and data flow, design of the levelland level 2 trigger systems, technology of data transmission, design of clock and control systems, timing of trigger decisions, and cost information.

FY92 R&D Tasks: Conceptual design:

Refine requirements definition: performance, protocols, functions, interfaces.

Define data from each subsystem to each level. Explore architecture and hardware layout. Integrate system design with subsystem designs. Complete baseline conceptual design.

Timing: Develop protocol of timing synchronization. Design and build proto clock/control module

to support tests of front ends.

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SDC STRAW TRACKER TRIGGER (Michigan)

Overview: A stiff track segment finder (synchronizer) is

constructed from digital delay chains configured as mean timers. Maximum drift time and momentum cuts are programmable. Segments can be linked to form tracks. A prototype one-channel synchronizer is undergoing detailed tests.

FY92 R&D Tasks: Multichannel version of synchronizer. Prototype tests with array of straws. Simulation of performance,

acceptance, efficiency, rejection.

SDC FIBER TRACKER TRIGGER (FNAL)

Overview: Stiff track segments are found in superlayers by

lookup techniques. Track segments are also linked using lookups. Digital ASIC's provide trigger functionality.

FY92 R&D Tasks: Simulation of trigger using test beam data. Preliminary design of logic:

Segment Finder ASIC Segment Linker ASIC Pt code and exchange.

Overview:

SDC CALORIMETER TRIGGER (FNAL, LBL, Chicago, Wisconsin)

The calorimeter trigger is based on digital data from trigger towers provided at 62 MHz. Energies are summed and electrons are identified by patterns of enegy deposition.

FY92 R&D Tasks: Develop adder tree. Develop design of electron pattern logic. Develop electron sorter logic.

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Overview:

SDC MUON TRIGGER (Michigan)

Stiff muon track segments are identified from scintillator and chamber hits using mean timers and coincidences. Combining information from counters and multiple chamber layers poses particular difficulties to the layout of the trigger system.

FY92 R&D Tasks: Conceptual design of primitives generation. Prototype ASIC's for wire/counter correlation. Prototype circuit design

for generating and mUltiplexing trigger primitives.

SDC DATA ACQUISITION: OVERVIEW OF STATUS AND R&D PRIORITIES

The current focus is a baseline conceptual design which provides a credible solution to the problems of high bandwidth and "deadtimeless" operation. The architecture should allow advantageous use of future progress in communications and computing technology. It should also allow scaling performance to very high levels. Challenges are formidable. Development of certain key components should be initiated.

Status: Preliminary conceptual design being reviewed. Architectural modelling proceeding. Prototype barrel-shifter event builder complete.

FY92 R&D Priorities: Evolve conceptual design; initiate system engineering. Construct comprehensive architectural model,

in lieu of prototype. Refine definition of f.e. interface and data collection;

initiate design of data collection circuits. Define control mechanism and network. Begin to understand issues of reliability & redundancy. Industrial collab on issues of large system design. Technology studies/tracking:

data transmission, event builder(KEK), farm (KEK) Initiate development of portable DAQ system.

Impact of budget: No significant growth of activity in this important area. Support only:

conceptual design, modelling, and a small effort on interface to front-end.

No support for: technology studies, reliability studies, portable DAQ, control mechanisms, or system engineering.

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D.- Bintinger

PAC Meeting October 3-4, 1991

toe SCINfilLAT(JA CAlOAIHEf'ER Off'ECT(JA CONSTAUCflON 9OE1Jll..E

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-_· __________________________ -1~"~~-'~--+-I~-.~-.-i~~.-i-.-i~,-.~,-,~,~1~'~'~'~.~I=.~'=.~="~=,.~=,.~:,,~:,~,t:":t:,,:t: .. :t:,.:t:,,:t:,:,t:,,=i: .. =i~.=i~J=,~»~~"=1~"~~R~~.~~',~=.~:"~: ... ~:"~,t~q~~;; ~ _________________________ -1~~~~~~J-~ __ L_~~ __ L__L~ __ L__L~~L__L~L_L__L~L_J_~_L_~~ __ L__L~-L--L~L-J-----J--L~,~~~ •• 'v.,~,.i~~ ... ,

M. Gilchriese

PAC Meeting October 3-4, 1991

Technical Proposal Production

Overall editors: O. Groom, W. Chinowsky, G. Trilling and M. Gilchriese

The SOC Technical Proposal - Coordinating Editors 1. Introduction - G. Trilling 2. Overview of the Detector - M. G ilchriese 3. Physics Performance - K. Einsweiler 4. Central Tracking System - A. Seiden 5. Superconducting Solenoid - A. Yamamoto 6. Calorimeter System - L. Nodulman 7. Muon System - G. Feldman 8. Electronics, Data Acquisition, Trigger and Control Systems - F. Kirsten 9. On-line Computing - A. Fry 10. Off-line Com puting - L. Price 11. Safety - J. EI ias 12. Experimental Facilities - T. Thurston 13. Installation and Commissioning - M. Harris 14. Test Beam Program - J. Siegrist 15. Cost and Schedule Summary - M. Gilchriese

'--------------------------R ---' ';'~~~=-

Technical Proposal Schedule October 1 Assign coordinating editors

November 13 Detailed outline + final writing assignments and/or draft text

December 13 Zeroth draft submitted to chapter editors(and overall editors for comments)

January 3 Submit first draft to overall editors

January 31 Submit second draft to overall editors

February 21 Deliver final draft to SSCL for duplication of 150 copies

February 26·29 Review of final draft by collaboration and editors

March 23

March 25

April 1

Final printout of text with figures

Assemble, print and bind 40 copies

Submit 40 copies to SSCL

'----------------------------------------------------------------~ --, .:,..I~'§i=-

Other Documents Related to Technical Proposal

• Cost/schedule book. Coordinators: W. Edwards, D. Etherton.

• SDC Project Management Plan and related documents: Coordinators: T. Elioff, T. Kirk

• Preliminary hazards analysis. Coordinator: J. Elias

'----------------------W1---, .".J~'§i=-

Budget Process and Schedule

• Established targets for subystem groups

• First round with subsystem groups complete by end of next week. Attempt to meet target and identify items to receive support if additional funds become available

• Compile first draft of detailed(by institution) budget summary by October 21

• Revise R&D and Engineering Plan by end of October.

• Finalize institutional agreements and budget assignments as soon as possible and "append" to overall plan.

• Reserve some funds or plan on redirecting funds as choices are made

'---------------------------------------------------~--' .i-.J~~=-

FY92 Budget Request($K)

Original Budget Minimum System Request Targets Required

Tracking systems 8575 3700 6200

Calorimeter systems 5800 3800 4800

Muon system 4300 2700 3200

Superconducting Sol. 800 500 600

Electronics systems 4050 1800 2300

Project Management 2500 2500 2800

Totals 26025 15000 19900

'-------------------------------------------------~--' .;, .. ~'S==-

Major Consequences of Reduced Budget

Tracking Systems

• Drop all work on pixel detectors

• Postpone work on forward silicon disks

• Force premature selection of outer barrel tracking technology

• Even with such a selection

• delay "proof-of-principle" prototype section of silicon tracker

• delay "proof-of-principle" for selected barrel technology

• no support in US of intermediate tracker

Muon System

• Defer construction of prototype supertower

'------------------------- ~----' .~~~~=-

Major Consequences of Reduced Budget cont.

Calorimeter Systems

• Defer most R&D on improved scintillator

• Defer most work on calibration system

• Eliminate engineering for forward calorimeter

• Defer prototype barrel wedge construction

• Slow down significantly engineering ramp up to move into detailed design

Electronics Systems

• Defer proof-of-principle of critical front-end components

• Delay prototype systems tests of front-ends

• No growth in DAQ or trigger area

• No prototype development in DAQ and trigger

'---------------~--' .~~~J

Conclusions

• The SOC is on track to produce a Technical Proposal, the related cost/schedule and other required documents by April 1, 1992.

• The present FV92 budget allocation will force a premature technology choice of the tracking system. The time to design, build, install and operate the tracking system before replacement or upgrade is about 15 years. We should make the correct choice.

• The present FV92 budget allocation will also cause substantial delays in prototypes for all systems and not allow an adequate build up of engineering resources

• We cannot pretend that the SOC will remain on schedule to be ready by 1999 with the present FY92 budget. Bl---'

,

CONCLUSIONS (CONTINUED)

The SOC needs to understand in much more detail what in-kind contributions will be available from its non-U.S. members, to define more clearly the actual level of U.S. funds needed. With a sound detector concept, it should be able to maximize the overall non-U.S. contribution level.

The SDC and its detector will, for many years, be a crucial link which allows the ambitious performance goals of the sse to be translated into potential for dramatic discovery. This is why such a large group is working on this enterprise; and why, in spite of base program commitments, that group has built up so much momentum. It is the opinion of both the U.S. and non-U.S. members of the SDe that if indeedAl$600M are needed, the extra funding involved is sufficiently modest on the scale of the sse enterprise that it will be found in the totality of countries involved.

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