LHC Collimation Review 2013

30 May 2013, 08:30 → 31 May 2013, 18:00 Europe/Zurich

30/7-018 - Kjell Johnsen Auditorium (CERN)

Mike Seidel (PSI)

Introduction:
In the frame of the LHC upgrades towards the High Luminosity LHC (HL-LHC), the improvement of the LHC collimation system is a critical aspect. The review has the main scope of assessing the needs of new collimators in the LHC cold dispersion suppressors for the operation beyond LS2.

Charge of the review panel:
The committee should look into the various aspects of the presented upgrade baseline and advise in particular on the need to pursue R&D on 11T dipoles for a possible installation in the LHC for LS2.

• Are the assumptions for performance reach estimates appropriate and adequately addressed?
• Is the present upgrade strategy appropriate in view of being able to take a decision in 2015?
• Is there any aspect that has been overlooked?

A final report should be produced and delivered to Steve Myers and Stefano Redaelli.

Review panel:
Mike Seidel (PSI, Chair), Giorgio Apollinari (FNAL), Wolfram Fischer (BNL), Marzio Nessi (ATLAS), Rudiger Schmidt (CERN/ESS), Carsten Omet (GSI).

Poster Review Photo

Report of the Review Committee CollimationReview_2013_report_final.pdf

Review summary 2013-05-24_LHCCollimationReview.pdf

Thursday, 30 May

08:30 → 10:00 Introduction to present collimation system and scope of the review

08:30 The HL-LHC timeline (15'+5')

Speaker: Lucio Rossi (CERN)

Slides HiLumiLHC_Rossi_CollReview_2013.pptx

08:50 Introduction to dispersion suppressor collimation (30'+10')

Speaker: Stefano Redaelli (CERN)

Slides SRedaelli_2013-05-30.pdf SRedaelli_2013-05-30.ppt

09:30 Present LHC collimator (25'+5')

Speaker: Roberto Losito (CERN)

Slides collimator_design_and_operational_experience.pptx

10:00 → 10:20 Coffee Break

10:20 → 12:05 Estimated performance reach of present LHC collimation for 7 TeV

10:20 Cleaning performance (15'+10')

Speaker: Belen Maria Salvachua Ferrando (CERN)

Slides 2013-05-30-CollReview2013-Belen.pdf

10:45 Setting limits and beta* reach (20'+10')

Speaker: Roderik Bruce (CERN)

Slides 2013.05.30--Collimation_review_-_Setting_limits_and_betaStar_reach.pdf 2013.05.30--Collimation_review_-_Setting_limits_and_betaStar_reach.pptx

11:15 Impedance (20'+10')

Speaker: Nicolas Frank Mounet (Ecole Polytechnique Federale de Lausanne (CH))

Slides colllimation_review_30052013_impedance.pdf

11:45 Collimation cleaning with ATS optics for HL-LHC (15'+5')

Speaker: Aurelien Marsili (CERN)

Slides CollReview_AMarsili_ATS.pdf

12:05 → 14:00 Lunch

14:00 → 15:30 Estimated performance reach of present LHC collimation for 7 TeV

14:00 DS collimation for heavy-ion operation (20'+10')

Speaker: John Jowett (CERN)

Slides

• CollimationReview2013-Jowett.pdf
• CollimationReview2013-Jowett.pptx
• DSCollimatorBFPP.cdf

14:30 Heat load scenarios and protection levels for ions (20')

Speaker: Genevieve Eleanor Steele (CERN)

Slides LHC_Collimation_review.pdf LHC_Collimation_review.pptx

14:50 Energy deposition simulations for quench tests (15'+5'')

Speaker: Eleftherios Skordis

Slides 2013_-_30_-_05_Collimation_Review_E._Skordis.pdf 2013_-_30_-_05_Collimation_Review_E._Skordis.pptx

15:10 Quench limits: extrapolation of quench tests to 7 TeV (15'+5')

Speaker: Arjan Verweij (CERN)

Slides 2013_Verweij_-_Collimation_review.pptx

15:30 → 15:50 Coffee Break

15:50 → 16:10 Estimated performance reach of present LHC collimation for 7 TeV

15:50 Overview of quench limits for faster time ranges (15'+5')

Speaker: Mariusz Sapinski (CERN)

Slides QLimits_May2013.pdf QLimits_May2013.pptx

16:10 → 16:30 Status DS collimation (in collision points and cleaning insertions)

16:10 What do we need to decide now to have Nb3Sn dipoles in LS2? (15'+5')

Speaker: Luca Bottura (CERN)

Slides Bottura_collimation_review.pdf Bottura_collimation_review.pptx

16:30 → 18:00 Closed session for review

Friday, 31 May

09:00 → 10:20 Status DS collimation (in collision points and cleaning insertions)

09:00 Status of 11T dipole program (20'+5')

Speaker: Mikko Karppinen (CERN)

Slides 11T_Status_MK_130530.pptx

09:25 Integration options for collimators in the DS zones (20'+10')

Speaker: Vittorio Parma (CERN)

Slides 11T+collimator_DS_integration_Review_May_2013.pdf 11T+collimator_DS_integration_Review_May_2013.pptx

09:55 Status of the TCLD collimator design (20'+5')

Speaker: Alessandro Bertarelli (CERN)

Slides TCLD_Design_v5.pdf TCLD_Design_v5.pptx

10:20 → 10:40 Coffee break

10:40 → 11:15 Collimation plans for the HL era (25'+10')

Speaker: Stefano Redaelli (CERN)

Slides SRedaelli_2013-05-31.pdf SRedaelli_2013-05-31.ppt

11:15 → 13:00 Closed session for review

13:00 → 14:00 Lunch

14:00 → 15:00 Closed session for review

15:00 → 15:45 Summary and review recommendations

Convener: Mike Seidel (PSI)

slides Committee_report_13.pdf Committee_report_13.pptx