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Collimation system upgrade and present CERN plan for Hi- Lumi

Collimation system upgrade and present CERN plan for Hi- Lumi. Lucio Rossi ( slides from R. Assmann, S. Myers, JP Tock) 1st CERN-FNAL collaboration meeting on 11 T. LHC Collimation as Staged System. LHC collimation was conceived in 2003 as a staged system . Phase 1:

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Collimation system upgrade and present CERN plan for Hi- Lumi

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  1. Collimation system upgrade and present CERN plan for Hi-Lumi Lucio Rossi (slidesfrom R. Assmann, S. Myers, JP Tock) 1st CERN-FNAL collaboration meeting on 11 T

  2. LHC Collimation as Staged System • LHC collimation was conceived in 2003 as a staged system. • Phase 1: • For initial beam commissioning and early years of LHC operation. • Not adequate for nominal and ultimate intensity. • Designed, constructed and commissioned 2003 – 2009. • Phase 2: • Upgrade for nominal, ultimate and higher beam intensities. • Issues in efficiency, impedance and radiation impact. • Originally not clear what the solution would be. • By now various upgrade solutions worked out and under design. • IR upgrade: • Adaptation to changes in IR upgrades: space and losses. • Adaptation to phase space modifications (ATS, crab cavities). 0.86A 0.5 A LRossi@FNAL

  3. LHC recap LRossi@FNAL

  4. Overall Collimation Plan • Interimcollimation system (2014 – 2016)Inefficiency: 0.002 % b* ~ 1 – 2 m, 7 TeV Gain ~100 in R2E (IR7IR3) • L ≤ 5 × 1033 cm-2 s-1 > 2 days per setup Full collimation system (2018 onwards)Inefficiency: 0.0004 % b* ~ 0.55 m, 7 TeV L not limited 30 s per setup Radiation optimization 2017 shutdown: IR(1)/2/(5)/7 DS BPM in coll. Radiation opt. TCT’s for IR6? 2013 shutdown: IR3 DScombined cleaning, IR2 TCT’s, TCLP installation? 2021 shutdown: tbd Initial collimation system (2009 – 2012)Inefficiency: 0.02 % b* ~ 1 – 1.5 m, 3.5 TeV R2E limits in IR7? > 4 days per setup Collimation IR Upgrade (2022 onwards)Low b*, 7 TeV TCT’s integrated into IR upgradeCompatibility with crab cavities LRossi@FNAL

  5. Relayout and Integration • Overview Tunnel side / QRL DFBA DFBA Q7 Q7 Q8 Q8 Q9 Q9 Q11 Q11 Q11 CC CC Q10 Q10 4.5 m. 4.5 m. L = 4.5 m L 4.5 m Tunnel side / QRL CC’ DFBA Q7 46 mm L’ = L – 4.5 m = 9.217 m Q9 Q8 Q10 Twocollimators (one per beam) on eachside of Point 3 LRossi@FNAL

  6. FORMER Rough Draft 10 year plan LRossi@FNAL

  7. BUT! New analysis LRossi@FNAL

  8. Not yet approved!

  9. So what to do? • Collimation review on June 14-15 at CERN to decide if go ahead or not for DS in Pont 3. • There willbe a preliminaryreviewassessing th risk of movingsomany cold elements in LHC. • In any case the availability of the 11 T successfulTwin model is « primordial ». • For the moment itis the « desired » tools for P7, IP2, IP1 and IP5, while P3 willbedone by removingmagnets (last MDs shows apparentlywecanrunatInomwithoutupgrading DS P3…underanalysis) • The couplingwithCryocollimatormayevenreduce by a factor 2 the need of collimators • Whatappears sure is P3, P7 and P2 (half?). • The Collimation upgrade dependsstrongly on the LHC behaviour: but SC Magnets R&D is long, and cannotdepend on last news. So weneed to have our plan and firmly go ahead till the 5.5 m Twin. LRossi@FNAL

  10. Couplingwithotherelement • CERN accelerator new project have been orgnanisedinto 4 projects • LHC consolidation : Simon Baird • LIU (LHC Injector Upgrade) : Roland Garoby • HL-LHC (High Luminosity LHC): Lucio Rossi • LinearCollider Project: Steiner Stapnes LRossi@FNAL

  11. HL-LHC Design Study HiLumi LHC Non-HiLumi LHC WP1 Project Management and Technical Coordination WP7 Machine Protection WP8 Collider-Experiment Interface WP2 Accelerator Physics and Performance WP3 Magnet Design WP9 Cryogenics WP10 Energy Deposition and shielding WP11 11 tesla dipole two-in-one WP4 Crab Cavities WP5 IR Collimation WP6 Cold Powering WP12 Integration & (de)installation HL-LHC • To HL are attachedalso: • Collimator(not only the inthe High lumi insertion) • Vacuum, diagnostics, etc… • High Field Magnet • HE-LHC studies LRossi@FNAL

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