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High Luminosity LHC (HL-LHC) and Crab Cavities Lucio Rossi CERN LHC Crab Cavity Worshop 15 Dec 2010
High Luminosity LHC (HL-LHC)and Crab Cavities
Lucio RossiCERN
LHC Crab Cavity Worshop 15 Dec 2010
L.ROSSI@LHC Crab Cavity Workshop 2
From September 2010HL-LHC formed as CERN project
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Int. Lumi by end of 2019: 200 fb-1
Or (positive assumption to reach L= 2·1034) 300 fb-1 15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 3
Physics reason for an upgrade
In particular, operation at higher luminosity as foreseen by HL-LHC has three main purposes:
1) Perform more accurate measurements on the new particles discovered in the LHC.
2) Observe rare processes, whether predicted by the Standard Model (SM) or by the new physics scenarios unveiled by the LHC, which have rates below the sensitivity of the current phase.
3) Extend the exploration of the energy frontier, therefore extending the discovery reach, by probing the very rare events where most of the proton momentum is concentrated in a single quark or gluon.
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 4
Two lines for the upgrade• Beam current• Beam structure• Low * and good geometric factor• Levelling. The experiment has stated that working with Lpeak >
51034 would pose a challenge extremely uncertain
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Courtesy E. Todesco
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 5
Technical reasons for an upgrade
• R2E (Radiation To Electronics) may be a killer above a certain threshold• Limitation of P5 Left Triplet cooling (because of presence of SCRF in P4 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• Magnet radiation damage at 300-400 fb-1 15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 6
Critical technologies for HL-LHC13 T Magnets- GW SC cables- Crab Cavities
SC Magnets beyond 10 tesla of accelerator qualities.Inner triplets Quads and D1/D2 dipolesD1 could be the KEK design-contributionNew step forward in circular accelerators !
Sc links for 200 kA-5 kV (1 GW DC)To remove from tunnel Magnet Power Supply, sensible to radiadiationTo easy integration in crowdy zoneTo remove form tunnel the DFB (Current Leads) and easy operation and maintenance
Crab Cavities at 400 MHzNew equipment for accelerators, and even more difficult for LHC (very compact)An asset also for LC !
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 7
The goal of HL-LHC
The main objective of HiLumi LHC Design Study is to determine a hardware configuration and a set of beam parameters that will allow the LHC to reach the following targets:
1) A peak luminosity of 5×1034 cm-2s-1 with levelling, allowing:
2) An integrated luminosity of 250 fb-1 per year, enabling the goal of 3000 fb-1 twelve years after the upgrade. This luminosity is more than ten times the luminosity reach of the first 10 years of the LHC lifetime.
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 8
First action of HL-LHC: 11 T LHC dipoleMake room for collimation beyond P3
15Dec2010
In 2012-13 we plan to move 28 cold equipmentsLater on this will be avoided, but an alternative solution is studied in HL-LHC:A 11T LHC MB (twin)Collaboration with Fermilab
A warm collimator sitting on a cold by-pass
Here cryocollimators could be accomodate
L.ROSSI@LHC Crab Cavity Workshop 9
H-LHC change in layout in the IR
Dispersion suppressor Matching section Separation dipoles Final focus
Today: 6 x 3 m x1.5 T; h=80 mmHL-LHC: 1 x 4 m x 7 T; Ø=150 mm
Today: Two-in-One Ø =56 mm; 4.2KHL-LHC: Two-in-One Ø70 mm; 1.9 K
Today: Q4 Two-inOne Ø=70 mm, 4.2 K; D2 ↑↑ 9 m x 3.5 T, 4.2 KHL-LHC: Q4 Two-in-One Ø=90 mm, 1.9 K; CRAB CAVITY; D2 ↑↑ 9 m x 5 T; 1.9 K
Today MQX: 4 x 6 m, Ø=70 mm;HL-LHC MQX: 4 x 8 m x; Ø=150 mm
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 10
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 start fall 2011• WP4: 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…
InstallationPDR preparation m Choice TDR Approval Construction
2011 2013 2014 2015 2020
HiLumi LHC
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 11
Value of the FP7 DS study
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 12
Governance of the whole HL-LHC collaboration
HL-LHCis larger than the FP7 design study application (named HiLumiLHC).
But the project structure is unique, some WPs are inside FP7 and soem are not , implemented by MoUs
CERN Council
CERN DG
Collaboration Board Scientific Advisory Board
Project Coordinator
Steering Committee
WP1 WP11
Project Office EC DG Research
WP6 to to WP7
Key:
Strategic decisions
Specific to HiLumi LHC
HiLumi LHC management structure extended to whole HL-LHC Design Study
15Dec2010
L.ROSSI@LHC Crab Cavity Workshop 13
WPs (further WP will be added)and cost
WP# Title HL-LHC Design Study
1 Project management and Technical Coordination HiLumi LHC
2 Accelerator Physics and Performance
3 Magnet Design
4 Crab cavities
5 IR Collimation
6 Cold Powering
7 Machine Protection Not within HiLumi LHC
8 Collider-Experiment Interface
9 Cryogenics
10 Energy deposition and shielding
11 11 T dipole two-in-one
12 Integration and (de-)installation
Tentative Cost EvaluationCost of FP7 Design Study (HiLumi LHC): 40 MCHFCost of total HL-LHC design study : 20 MCHF Cost of HL-LHC project : 700 MCHF (500 MCHF manufacture, assembly, installation)
15Dec2010
