Projects Overview

Projects Overview / V. Mertens / LTI and CNGS Controls Review / 10. 7. 2001

Projects Overview

Volker Mertens, CERN, 10. 7. 2001

Outline:

LTI + CNGS overviews (schematic)

Beam parameters + machine cycles

Planning / installation + (LTI) commissioning phases

Layouts + optics (incl. warm line for LHC sector test)

Main challenges

Instead of a summary ...


= excavated

http://proj-cngs.web.cern.ch/proj-cngs/05/2005


CNGS flight path, main components @ CERN


TT41 optics

target

05/2005


SPS cycles (interleaved with slow extr. or LHC filling)


2001 2002 2003 2004 2005


http://proj-lti.web.cern.ch/proj-lti/

• combined length 5.6 km

• over 700 room-temperature magnets (74 recup’d)

04/2006

04/2004

TI 2

TI 8

TI 2 / TI 8 overall layout, milestones


Machine cycles, bunch structure, filling pattern


Beam parameters

Momentum GeV/c 450 400

Emittance norm’d m rad 3.5 12

Bunch intensity nom (ult) 1011 p 1.1 (1.7) 0.115 (0.167)

Cycle intensity nom (ult) 1013 p 2.4 (4.9) 4.8 (7)

Bunch spacing ns 25 5


2001 2002 2003 2004 2005 2006


Gen. appr.: installation + commissioning in 3 phases

1. SPS extraction / TT40 (up to TED400353)

2. Transfer line TI 8 (up to TED87765)

3. LHC injection (up to TDI (no, up to IP 8 !))

disentangle work + pot. problems; build upon previous experience

as from 04/2004

late 2003

early 2003

debug full-size installationset up trajectory correctioncheck behaviour of line (time-dependent effects ?)measure optical characteristicstest new software (basic debugged ingredients of definitive system)

test extraction equipmenttest extraction performance / check for SPS errors (p-to-p repr., drifts ?)testbed for bulk equipment control (MS, PO, BI, VAC, …)testbed for new software (could still do with temporary solutions)

set up injection equipment

learn to work with new software (seamless link with LHC BI,

preparation for integration with LHC first turns (inj. osc., orbit FB, ...)access + safety systems fully functionalinterlocks primordial (at least at higher intensities)

http://cern.web.cern.ch/CERN/Divisions/SL/publications/chamx2001/PAPERS/6-6-vm.pdf


SPS (new fast) east extraction TI 8 + CNGS

0

40

80

120

3969 3985 4001 4017 4033 4049 4065S (m)

x (

mm

)

MSE1-6MKE 1-5 TPSG

early 2003

1


access gallery

TT40

TT41

TI 8

ECA4

SPS

TT40

STOP

TEDchicane

early 2003

link tunnel (TA42)

access gallery to neutrino target area (TA41)

1

Projects Overview / V. Mertens / LTI and CNGS Controls Review / 10. 7. 2001s(m)

D(m

)

Transfer line TI 8

TED

2

late 2003


LHC injection layout (schematic)

TCDD

3

as from 04/2004


Provisions for sector test (temporary warm line)

• « replace LHC » between MKI and IP8 by warm line

• install injection elements definitively

• reproduce geometry (replace D1 and D2 by small bends)

• match to TI 8 and arc optics

• use TI 2 material (magnets, supplies, vacuum, …)

• locate supplies in UA87• definitive vacuum ch. ?

STOP

arc

TI 8

D1’ D2’

Q

courtesy: A. Verdier

IP8


Aperture of main dipoles in TI 8 (1:1 view)

Tz, tz ...


Aperture of main dipoles in TI 8 (enlarged view)

25 mm

chamber thickness

tolerances + errors

beam sizebeam size + dispersionbeam size + dispersion + trajectory error

- over ~ 1.5 km of dipoles (+ quadrupoles)

- if BPM / corrector system works well


TI 2 + TI 8 + TT41 1 new SPS (w/o RF, all usual ingredients + their controls)

Beam parameters (energy, intensity, emittance)

Apertures ( good observation, trajectory correction, interlocks)

Required delivery precisions (on CNGS target, on LHC orbit) +

Efficiency (LHC injection good observation, feedbacks ?)

High demands on (early) operational availability + throughput

Operational rigour (“fine-tuning” settings, bypassing interlocks, skipping a step in a sequence: know well what you’re doing, follow the checklists !)

Control system + BI need to be ready early (conc. on understanding TL + LHC)

Access system + interlocks must be capable to handle varying conditions safely and efficiently (multi-cycling, instant access)

Logistics (amount of material, manpower sharing, time/access sharing)

No cutting-edge technology

No problems from multi-pass

Main challenges


What should this review achieve ?- Identify the systems that will be needed to control LTI and CNGS equipment - Examine the interfaces between these systems and the SPS and LHC accelerator controls - Identify areas where new initiatives are required

- Clarify controls responsibilities and milestones at all levels Clarify basic HW questions:- Location of electronics- Type + number of front ends- Network connections- Cables (to order + find space for)- ...

Define who does what and when:- Decision on the approach- Software writing- Coordination + follow-up

Instead of a summary ...

And, finally, if I could wish (or recommend) something:

Think about lifespan of operation (15 yrs ?)

Please no last minute rush - if you can avoid it.

Sector test is good test bed for LHC and new SW - try to make best use of it.


Reminds me of a “bottle”-neck we once had in LEP…

Projects Overview

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