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High Luminosity LHC (HL-LHC) and Crab Cavities

High Luminosity LHC (HL-LHC) and Crab Cavities. Lucio Rossi CERN LHC Crab Cavity Worshop 15 Dec 2010. From September 2010 HL-LHC formed as CERN project. Int. Lumi by end of 2019: 200 fb -1 Or (positive assumption to reach L= 2 · 10 34 ) 300 fb -1.

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High Luminosity LHC (HL-LHC) and Crab Cavities

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  1. High Luminosity LHC (HL-LHC)and CrabCavities Lucio Rossi CERN LHC CrabCavityWorshop 15 Dec 2010

  2. FromSeptember 2010HL-LHC formed as CERN project Int. Lumi by end of 2019: 200 fb-1 Or (positive assumption to reach L= 2·1034) 300 fb-1 L.ROSSI@LHC Crab Cavity Workshop

  3. Physicsreason for an upgrade L.ROSSI@LHC Crab Cavity Workshop

  4. Twolines for the upgrade • Beamcurrent • Beam structure • Low* and good geometric factor • Levelling. The experiment has statedthatworkingwithLpeak > 51034would pose a challenge extremelyuncertain Courtesy E. Todesco L.ROSSI@LHC Crab Cavity Workshop

  5. Technical reasons for an upgrade • R2E (Radiation To Electronics) maybe a killer above a certain threshold • Limitation of P5 Left Triplet cooling(because of presence of SCRF in P4 Right using the samecryoplant) • Possible limitation in Inner triplet coolingat1.6 1034because of chokedHeat Ex. Tube (and additional thermal links) • Limitation of cryoplant and magnetstability(justwithoutmarginatultimatelumi) • Lack of flexibility: arc-IR fullycryocoupled • Magnet radiation damage at 300-400 fb-1 L.ROSSI@LHC Crab Cavity Workshop

  6. Critical technologies for HL-LHC13 T Magnets- GW SC cables- CrabCavities SC Magnetsbeyond 10 tesla of acceleratorqualities. Inner triplets Quads and D1/D2 dipoles D1 couldbe the KEK design-contribution New stepforward in circularaccelerators ! Sc links for 200 kA-5 kV (1 GW DC) To removefrom tunnel Magnet Power Supply, sensible to radiadiation To easyintegration in crowdy zone To removeform tunnel the DFB (CurrentLeads) and easyoperation and maintenance CrabCavitiesat 400 MHz New equipment for accelerators, and evenmore difficult for LHC (very compact) An assetalso for LC ! L.ROSSI@LHC Crab Cavity Workshop

  7. The goal of HL-LHC L.ROSSI@LHC Crab Cavity Workshop

  8. First action of HL-LHC: 11 T LHC dipoleMake roomfor collimation beyond P3 In 2012-13 we plan to move 28 cold equipments Later on thiswillbeavoided, but an alternative solution isstudied in HL-LHC: A 11T LHC MB (twin) Collaboration withFermilab A warm collimatorsitting on a cold by-pass Herecryocollimatorscouldbeaccomodate L.ROSSI@LHC Crab Cavity Workshop

  9. H-LHC change in layout in the IR Today MQX: 4 x 6 m, Ø=70 mm; HL-LHC MQX: 4 x 8 m x; Ø=150 mm Today: Two-in-One Ø =56 mm; 4.2K HL-LHC: Two-in-OneØ70 mm; 1.9 K Today: 6 x 3 m x1.5 T; h=80 mm HL-LHC: 1 x 4 m x 7 T; Ø=150 mm Final focus Matching section Separation dipoles Dispersion suppressor Today: Q4 Two-inOneØ=70 mm, 4.2 K; D2 ↑↑ 9 m x 3.5 T, 4.2 K HL-LHC: Q4 Two-in-One Ø=90 mm, 1.9 K; CRAB CAVITY; D2 ↑↑ 9 m x 5 T; 1.9 K L.ROSSI@LHC Crab Cavity Workshop

  10. HiLumi LHC PDR preparation m Choice Construction TDR Approval Installation 2011 2013 2014 2015 2020 High Lumi EU FP7 Design Study • 4 year program • CERN • CEA, CNRS, Desy, INFN (Mi&LNF), CSIC (UniValencia), UniLAN, UniLiv, UniMan, RH UniLon, STFC, EPFL, BINP • KEK • LARP: BNL, FNAL,LBNL, SLAC and ODU (Jlab) • Application to EU: 25th Nov 2010 • Answer for April 2011 to startfall 2011 • WP4: CrabCavities. • In 2010 crabcavitieschangedstatusfromuseful – extravagant – tool for a future upgrade to the status of criticalelementat the heart of the HL-LHC project •  Increasedconsciousness of the responsibilty of CC communityneeded •  Focussed R&D mode (less workshop?) • Decision on magnetdogleg for Local schemeisnevertooearly… L.ROSSI@LHC Crab Cavity Workshop

  11. Value of the FP7 DS study L.ROSSI@LHC Crab Cavity Workshop

  12. Governance of the wholeHL-LHC collaboration HL-LHC islargerthan the FP7 design study application (namedHiLumiLHC). But the project structure is unique, someWPs are inside FP7 and soem are not , implemented by MoUs L.ROSSI@LHC Crab Cavity Workshop

  13. WPs (further WP willbeadded)and cost Tentative CostEvaluation Cost of FP7 Design Study (HiLumi LHC): 40 MCHF Cost of total HL-LHC design study : 20 MCHF Cost of HL-LHC project : 700 MCHF (500 MCHF manufacture, assembly, installation) L.ROSSI@LHC Crab Cavity Workshop

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