International Review of the HL-LHC Collimation System

Session

Session 2: Upgrade plans - performance and needs

11 Feb 2019, 11:30

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

7. Cleaning upgrades in the dispersion suppressors (20+10)

Anton Lechner (CERN)

11/02/2019, 11:30

• Review technical solutions for DS around IR7 and IR2
• Studies of different locations for IR7 and final layouts
• TCLD design: settings and material choices. Functional specifications
• Review key/critical points in the ECR (installation, safety, transport…)

8. Quench performance and assumptions: simulations and beam tests (20+10)

Eleftherios Skordis (CERN)

11/02/2019, 12:00

• Collimation quench tests with protons: can we quench with proton beams?
• Collimation quench tests with ions and BFPP quench tests
• Benchmark of simulations: peak energy deposition for the different test

9. Quench performance and assumptions: magnets and cryogenics (20+10)

Luca Bottura (CERN)

11/02/2019, 12:30

• Quench limits and possible limitations from cryogenics
• Status of cryogenics limitations for different loss scenarios
• Comparison of present dipole and 11T dipole

10. Operational experience with ions (20+10)

Nuria Fuster Martinez (CERN)

11/02/2019, 14:00

• Review of relevant aspects in ions runs
• Plans for bumps in different IRs: IR1/5 without TCLD and IR2 with TCLD (without 11T)
• Are the bump solutions robust enough for the HL-LHC
• Luminosity reach with the present upgrade scenarios
• Brief highlights from the crystal collimation tests with ion beams during Run 2

11. Status of 11T dipole project (20+10)

Frederic Savary (CERN)

11/02/2019, 14:30

• Overview talk from WP11: where we are and what are the plans for LS2
• Final configuration of cold masses and corrector package in new locations
• Summary of LS2’s ECRs

12. Impedance models, operational experience and expected limitations (20+10)

Elias Metral (CERN)

11/02/2019, 15:00

• IR7 upgrade plans in LS2 and LS3
• Experience from Run I and Run II
• Expectations for HL-LHC
• Review of beam tests with the low-impedance prototype
• Other mitigation options for impedance issues (new optics, asymmetric settings, new ATS) and drawbacks: theory and beam test results

13. IR collimation upgrades – incoming beam (20+10)

Hector Garcia Morales (Royal Holloway University of London (RHUL)), Roderik Bruce (CERN)

11/02/2019, 15:30

• Layout for new IR1 and IR5
• Protected aperture and baseline settings
• Proposed material choices and their performance

14. IR collimation upgrades – outgoing beam (20+10)

Francesco Cerutti (CERN)

11/02/2019, 16:30

• Layout for new IR1 and IR5: TCLs and masks
• DS losses at high luminosity: any limitations for proton operations?
• Status of mask specifications

15. Plans and goals for remote alignment and impact on collimator designs (20+10)

Paolo Fessia (CERN)

11/02/2019, 17:00

• Overview of the overall plans, with specific aspects for WP5
• Review tolerances and specifications
• Timeline for critical decision points

16. Review of hollow e-lenses (20+10)

Adriana Rossi (CERN)

11/02/2019, 17:30

• Recap. previous reviews and status of baseline process
• Design overview: where we are
• Status of process for insertion into baseline