H. EvansBeauty 2000 - 15/Sep/001 The DØ Upgrade Hal Evans Columbia University for the DØ...

H. Evans Beauty 2000 - 15/Sep/00 1

DD

The DØ UpgradeThe DØ Upgrade

Hal Evans

Columbia University

for the DØ Collaboration

where we areand

where we’re going


DD The Times They are a Changin’

• Tevatron Improvements…– Main Injector– Antiproton Recycler Ring

• …mean Detector Challenges– Electronics response time– Occupancies & Pileup– Radiation Damage– Trigger Decision time

• …and Physics Opportunities– See next talk

Ib IIa IIa (?) IIb

Tot. Anti-p (x1012) 0.3 1.1 4.2 11

Bunches 6x6 36x36 140x103 140x103

Spacing [ns] 3500 396 132 132

E-CM [GeV] 1800 1960 1960 1960

Typ. Lumi. [cm-2s-1] (x1032)

0.16 0.86 2.1 5.2

Lumi/week pb-1 3.2 17.3 42 105

Tot Lumi fb-1 0.125 2-4 15-20

Int’s/X’ing 2.5 2.3 1.9 4.8


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DD Silicon

1 2 3 4 5 6

1 23 4

5 67 8

9101112

• 6 Barrels

• 12 F-Disks

• 4 H-Disks

• 793k Channels

• 3.0 m2 Si (1.6 m2 D.S.)

• SVX IIe Readout

• L2 Trigger (’02)

Barrels F-Disks H-Disks

Sensors 72 SS144 DS(90)216 DS(2)

144 DS 96(back-to-

back)

Strip Pitch 50 m (A)153 m (90)62.5 m (2)

62.5 m (n)50 m (p)

80 m

D.S. Stereo 90o / 2o ±15o ±7.5o

R/O Length 12.4 cm 7.5 cm 14.6 cm

Inner Radius 2.7 cm 2.6 cm 9.5 cm

Outer Radius 9.4 cm 10.5 cm 26 cm


DD Fiber Tracker

8 Double Cylinders of Scintillating Fibers (830 m)

• Radii: 20 51 cm

• Active Lengths: – 1.66 m (inner-2); 2.52 m (outer 6)

• Axial + Stereo (±3o) Fibers

• VLPC Readout: ~77k Channels– SIFT + SVX IIe

• L1 Trigger Information

SiliconCentral Fiber Tracker

Solenoid

Forward Preshower

Central Preshower


DD Tracking

Run I Run II

Detectors Drift chamb’s + TRD

Silicon + Fiber Tracker + PS

Solenoid — 2.0 T

|| Coverage <3.0 (FDC) Si <3.0

CFT <1.7

Hit Resolution 50-200 m Si 10 m

CFT 100 m

PT / PT — 8% (PT=45GeV, =0)

r- Impact Par — 18 m (PT=1GeV, =0)

Trigger — PT > 1.5 GeVCFT:L1,2; Si:L2(’02)


DD Tracking Status

Silicon:

• Ladder/Wedge 90% complete (!)

• Electronics SVXIIe: all in handSVX support card (HDI): nearly

done

• Detectors Barrels: 4 / 6 complete

F-Disks: 7 / 12 complete

H-Disks: ~half done

• Readout Testing full barrel with

final readout

Fiber Tracker

• Detector Installed (29-Jun-00)

• VLPC Cassette 40 / 100 complete(on schedule for

1/01)

• Waveguides starting installation


DD It’s Really There!

Si Barrel

CFT + Solenoid Installed


DD Preshowers

Central Forward

Silicon

CFT

Solenoid

Calorimeter

Central Forward

Detector Triangular Scint. Fibers

Pre-radiator 2Xo (solenoid+Pb) 2Xo (material+Pb)

Fibers Axial & ±20o stereo ±22.5o

Channels 7.7k 16k

|| Coverage <1.2 1.4 – 2.5

Readout VLPCs shared w/ CFT

e-Trig Bgrd Rej x 3 – 5 x 2 – 4

Status Installed Installed


DD Calorimetry

• Detector Unchanged from Run I (U-LAr)

• New Electronics to cope with BX frequency– PreAmps: 5k / 55k installed

– Baseline Subtr in production

• New Calibration Tools– Zbb (b-jet scale)

• Peak pos to 0.3%• Requires STT

|| Coverage < 4.0

Granularity : 0.10.1

Energy Res EM 14%/E <1% (~0)

Had 50%/E

Jet 80%/E

Electrons

E/P


DD Muon Upgrade

Bottom B/C Scint

Central Trigger Scint (A- )

PDTs(Run I)

ForwardTrigger Scint(Pixels)

Forward Tracker (MDTs)

Shielding

Improved Trigger


DD Muon Detection

Run I Run II

|| Coverage < 3.6 < 2.0

Total Accept. only partial scint coverage

90% (1 Layer)

75% (2 Layer)

Shielding Calorim: 5-9 I

Toroid Fe: 7-9 I

add beampipe shielding

P Resolution 0.18 0.03PT 0.02 0.02PT

(from inner tracking)

Trigger PT > 3 GeV PT > 1.5 GeVimproved accept


DD Muon Status

Detector

• Central Muonscommissioning

• Forward Pixels A-layer installed

• MDTs A&C installedB assembled

• Gas System design

Electronics

• PDT / MDT done

• Scintillators September

• Readout November(enough for

commiss.)


DD In the Hall

A-Layer South Pixels


DD Trigger

L14.2 s

(128 terms)

L2100 s

(128 terms)

L350 ms

(48 nodes)

Framework7 MHz

10 kHz 1 kHz 50 Hz

Data

Process X-Section Rate(L=21032 cm-2s-1)

Inelastic pp 50 mb 10 MHz

bb (|y|<1) 50 b 10 kHz

pp WX 22 nb 4.4 Hz

pp ZX bbX 1 nb 0.2 Hz

pp tX 11 pb 8 / hour

pp W/Z H 0.5 pb 8 / day

• Single Sub-Det’s

• Towers, Tracks, ET-miss

• Some correl’s

• Correlations

• Calibrated Data

• Physics Objects e,,j,,ET-miss

• Simple Reco

• Physics Algo’s


DD L1 & L2 Systems

L2FW:Combinedobjects (e, , j)

L1FW: towers, tracks

L2STT

Global L2

L2CFT

L2PS

L2Cal

L1PS

L1CFT

L2MU

L1MU

L1FPD

Detector L1 Trigger L2 Trigger

7 MHz 10 kHz 1 kHz

CAL

FPSCPS

CFT

SMT

MU

FPD

L1CAL


DD Bigger – Faster

Status

• Note: trigger installation/commissioning does not delay detector preparation

• Framework testing & debugging

• Level-1 most boards in productionfirmware: CFT-done, others-prog

• Level-2 custom cards: done or productionsoftware: in progress

• Level-3 basic tools writtenhardware in Oct.

Run I Run II

Rates In 300 kHz 7 MHz

L1 150 Hz 10 kHz

L2 — 1 kHz

L3 4 Hz 50 Hz

Terms L1 32 128

L2 — 128

L3 128 arbitrary

Inputs L1 calorim,muons cal,mu,trk,ps

L2 — corr’s,phys objs

L3 vax farm pc farm


DD Installation & Commissioning

• This is a 4D problem!

• Dec 99 Review Installation sequence changed radically to gain contingency1. Split Silicon into two halves

– Installation: S in Nov.; N in Dec.

2. Push up schedule for installing end toroid iron– done!

• Gain ~3 months contingency over previous schedule– Fallback plans in place

• Installation is now driving all upgrade efforts– even with conting. schedule is still tight

• Commissioning proceeding as parts/detectors arrive


DD Accomplishments & Deadlines

Subsystem Status Future

Silicon 4 barrels assemb install 11/&12/00

Fiber tracker Installed

Tracker Electr production complete 2/01

Solenoid working

Central Preshower installed

Forward Preshower

installed

Intercryostat det. installed

Calorim Electronics

production complete 12/00

Luminosity Mon. measuring lumi

Muon Central commissioning

Muon Forward installing complete 11/00

Trigger & DAQ prod & use complete 3/01

Online in use

Installation on schedule complete 2/01

Commissioning in progress

Computing commissioning


DD On the Horizon(beyond 2 fb-1)

• RunII Physics Goals need 15-20 fb-1

• Run IIb Tevatron– L51032 cm-2s-1

– X’ing angle z 25 12 cm

• Possible Problems for DØ

• Some Constraints– need to maintain IIa performance– time: Run IIb in 2003?– readout chips: limited SVXIIe’s left– and of course… $$$

• Si Solutions under consideration– will choose from many options soon

Rad damage to Si (esp L 1,2) • Partial/full replacement (?)

• Use SS Si back-to-back

Incr. Material imp par degrade • Layer 0 (?)

Track Trigger Rate • Intermediate Si (?)

Central Muon (PDT) Aging • Regular Zapping


DD Where We Are(and where we’ll be)

• Detector– Production working or winding down

• Worries with Si sensors mainly over

– Emphasis shift to electronics/readout

• Installation– Many detectors installed– Fallback plan 2-3 months contingency

• Commissioning– In full swing!

• Starting work for > 2 fb-1 (Run IIb)

• Nostradamus predicts…

DØ will be ready in February 2001*

* Feb. 16, 2001 to be precise

H. EvansBeauty 2000 - 15/Sep/001 The DØ Upgrade Hal Evans Columbia University for the DØ...

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