High Luminosity LHC HLLHC and Crab Cavities Lucio
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· 1034) 300 fb-1 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 2
Physics reason for an upgrade 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 3
Two lines for the upgrade • • Beam current Beam structure Low * and good geometric factor Levelling. The experiment has stated that working with Lpeak > 5 1034 would pose a challenge extremely uncertain Courtesy E. Todesco 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 4
Technical reasons for an upgrade 15 Dec 2010 • R 2 E (Radiation To Electronics) may be a killer above a certain threshold • Limitation of P 5 Left Triplet cooling (because of presence of SCRF in P 4 Right using the same cryoplant) • Possible limitation in Inner triplet cooling at 1. 6 1034 because of choked Heat Ex. Tube (and additional thermal links) • Limitation of cryoplant and magnet stability (just without margin at ultimate lumi) • Lack of flexibility: arc-IR fully cryocoupled -1 • Magnet radiation damage at 300 -400 fb L. ROSSI@LHC Crab Cavity Workshop 5
Critical technologies for HL-LHC 13 T Magnets- GW SC cables- Crab Cavities SC Magnets beyond 10 tesla of accelerator qualities. Inner triplets Quads and D 1/D 2 dipoles D 1 could be the KEK design-contribution New step forward in circular accelerators ! Sc links for 200 k. A-5 k. V (1 GW DC) To remove from tunnel Magnet Power Supply, sensible to radiadiation To easy integration in crowdy zone To remove form tunnel the DFB (Current Leads) and easy operation and maintenance 15 Dec 2010 Crab Cavities at 400 MHz New equipment for accelerators, and even more difficult for LHC (very compact) An asset also for LC ! L. ROSSI@LHC Crab Cavity Workshop 6
The goal of HL-LHC 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 7
First action of HL-LHC: 11 T LHC dipole Make room for collimation beyond P 3 In 2012 -13 we plan to move 28 cold equipments Later on this will be avoided, but an alternative solution is studied in HL-LHC: A 11 T LHC MB (twin) Collaboration with Fermilab A warm collimator sitting on a cold by-pass Here cryocollimators could be accomodate 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 8
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. 2 K HL-LHC: Two-in-One Ø 70 mm; 1. 9 K Dispersion suppressor Today: 6 x 3 m x 1. 5 T; h=80 mm HL-LHC: 1 x 4 m x 7 T; Ø=150 mm Matching section Separation dipoles Final focus Today: Q 4 Two-in. One Ø=70 mm, 4. 2 K; D 2 ↑↑ 9 m x 3. 5 T, 4. 2 K HL-LHC: Q 4 Two-in-One Ø=90 mm, 1. 9 K; CRAB 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop CAVITY; D 2 ↑↑ 9 m x 5 T; 1. 9 K 9
High Lumi EU FP 7 Design Study Hi. Lumi LHC PDR preparation m 2011 Choice 2013 TDR Approval 2014 • 4 year program • CERN • CEA, CNRS, Desy, INFN (Mi&LNF), CSIC (Uni. Valencia), Uni. LAN, Uni. Liv, Uni. Man, RH Uni. Lon, STFC, EPFL, BINP • KEK • LARP: BNL, FNAL, LBNL, SLAC and ODU (Jlab) 15 Dec 2010 2015 • • Construction Installation 2020 Application to EU: 25 th Nov 2010 Answer for April 2011 to start fall 2011 WP 4: Crab Cavities. In 2010 crab cavities changed status from useful – extravagant – tool for a future upgrade to the status of critical element at the heart of the HL-LHC project Increased consciousness of the responsibilty of CC community needed Focussed R&D mode (less workshop? ) Decision on magnet dogleg for Local scheme is never too early… L. ROSSI@LHC Crab Cavity Workshop 10
Value of the FP 7 DS study 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 11
Governance of the whole HL-LHC collaboration HL-LHC is larger than the FP 7 design study application (named Hi. Lumi. LHC). But the project structure is unique, some WPs are inside FP 7 and soem are not , implemented by Mo. Us 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 12
WPs (further WP will be added) and cost Tentative Cost Evaluation Cost of FP 7 Design Study (Hi. Lumi LHC): 40 MCHF Cost of total HL-LHC design study : 20 MCHF Cost of HL-LHC project : 700 MCHF (500 MCHF manufacture, assembly, installation) 15 Dec 2010 L. ROSSI@LHC Crab Cavity Workshop 13
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