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Projects Overview

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.

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Projects Overview

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  1. 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 ...

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

  3. CNGS n flight path, main components @ CERN

  4. TT41 optics 05/2005 target

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

  6. 2001 2002 2003 2004 2005

  7. TI 2 / TI 8 overall layout, milestones • combined length 5.6 km • over 700 room-temperature magnets (74 recup’d) http://proj-lti.web.cern.ch/proj-lti/ TI 8 04/2004 TI 2 04/2006

  8. Machine cycles, bunch structure, filling pattern

  9. Beam parameters Momentum GeV/c 450 400 Emittance norm’d mm 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

  10. 2006 2001 2002 2003 2004 2005

  11. Gen. appr.: installation + commissioning in 3 phases disentangle work + pot. problems; build upon previous experience http://cern.web.cern.ch/CERN/Divisions/SL/publications/chamx2001/PAPERS/6-6-vm.pdf 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 !)) test extraction equipment test 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) early 2003 debug full-size installation set up trajectory correction check behaviour of line (time-dependent effects ?) measure optical characteristics test new software (basic debugged ingredients of definitive system) late 2003 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 functional interlocks primordial (at least at higher intensities) as from 04/2004

  12. SPS (new fast) east extraction TI 8 + CNGS 1 early 2003

  13. TT40 1 access gallery to neutrino target area (TA41) link tunnel (TA42) ECA4 access gallery TED TT41 chicane STOP TT40 SPS TI 8 early 2003

  14. Transfer line TI 8 2 TED D(m) late 2003 s(m)

  15. LHC injection layout (schematic) 3 as from 04/2004 TCDD

  16. STOP Provisions for sector test (temporary warm line) D1’ D2’ • « 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. ? Q IP8 arc TI 8 courtesy: A. Verdier

  17. Tz, tz ... Aperture of main dipoles in TI 8 (1:1 view)

  18. chamber thickness tolerances + errors beam size + dispersion beam size + dispersion + trajectory error beam size 25 mm Aperture of main dipoles in TI 8 (enlarged view) - over ~ 1.5 km of dipoles (+ quadrupoles) - if BPM / corrector system works well

  19. Main challenges 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

  20. 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. Instead of a summary ... 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

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

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