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HL-LHC from a study to a PROJECT 300 fb -1 → 3000 fb -1

The European Strategy for Particle Physics Update 2013.

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HL-LHC from a study to a PROJECT 300 fb -1 → 3000 fb -1

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  1. The European Strategy for Particle Physics Update 2013 c) Europe’s top priority should be the exploitation of the full potential of the LHC, including the high-luminosity upgrade of the machine and detectors with a view to collecting ten times more data than in the initial design, by around 2030. This upgrade programme will also provide further exciting opportunities for the study of flavour physics and the quark-gluon plasma. HL-LHC from a study to a PROJECT 300 fb-1 → 3000 fb-1 including LHC injectors upgrade LIU(Linac 4, Booster 2GeV, PS and SPS upgrade)

  2. LHC and Injector Upgrade: when? • During Run II and Run III we will be limited by heat load in the triplet (luminosity debris) and pile-up at the experiments • Every 3 of 4 year a long shutdown period is planned for upgrade activities Run II: 13 or 14 TeVc.m. with levelled luminosity of <1.7x1034 cm-2 s-1 Run III: 14 TeVc.m. with levelled luminosity of <1.7x1034 cm-2 s-1 ~5 months Longer end-of-year stop (CMS) LS2: 18 months Connection of LINAC4 LHC Injectors Upgrade ALICE, LHCb Upgrade LS3: 30 months High Luminosity LHC Machine and Experiments G. Arduini - ABP Information Meeting

  3. Ingredients for the Upgrade • Operation at pile-up/pile-up density limit: • choose parameters that allow higher than design pile-up • Low b* (ATS optics - S. Fartoukh)  larger aperture triplets • Lower Emittance, • Higher Bunch population • Crab Cavities as tool to maximize overlap among colliding bunches (i.e. virtual luminosity) and minimize pile-up density • levelling mechanisms for controlling pile-up during fill • dynamic b* squeeze G. Arduini - ABP Information Meeting

  4. HL-LHC Parameters Aim for ~250 fb-1/y G. Arduini - ABP Information Meeting

  5. Hardware for the Upgrade • Main modifications: • New high field/larger aperture interaction region magnets • Crab Cavities to take advantage of the small b* • New collimators (lower impedance) • Additional cryo plants (P1, P4, P5) • SC links to allow power converters to be moved to surface • Cryo-collimators and high field 11 T dipoles in dispersion suppressors G. Arduini - ABP Information Meeting

  6. US-LARP • The US LHC Accelerator Research Program (LARP) formed in 2003 to coordinate US R&D related to the LHC accelerator and injector chain (BNL, FNAL, LBNL, SLAC) • LARP has contributed to the initial operation of the LHC, but much of the program is focused on future upgrades • Increase Luminosity • Beam Handling/Monitoring • Program is currently funded at a level of about $12-13M/year • Main deliverables for HL-LHC are: • Nb3Sn 150 mm quads for the triplet • Crab cavities • High bandwidth feedback for SPS (could be needed also for LHC) G. Arduini - ABP Information Meeting

  7. Triplets • HQ02b (short quadrupole with 120 mm diameter aperture)has reached 90% of the ultimate current with very good memory, kept from the end of the testing in the US to the continuation of the tests in CERN. • Peak field reached by this quadrupole exceeded 13 T close to peak field expected for nominal HL-LHC triplet quadrupole G. Sabbi - LBNL G. Arduini - ABP Information Meeting

  8. Crab cavities • All prototypes reached the required voltage (3.4 MV/cavity) • Main issues with ancillary equipment Lancaster Univ. BNL ODU/SLAC G. Arduini - ABP Information Meeting

  9. Crab cavities • Down-selection of the crab cavity designs: • Plan-A: BNL Double Quarter wave cavity design. • Plan B: RF Dipole resonator from Old Dominion University (ODU/SLAC) • The 4-Rod cavity design will not be pursued. • More focus for the preparation of a test of these cavities in the SPS planned for 2016 G. Arduini - ABP Information Meeting

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