Login

International Review of the HL-LHC Collimation System

11–12 Feb 2019
CERN
Europe/Zurich timezone

Contribution List

22 out of 22 displayed
Export to PDF
  1. 1. Welcome, introduction and mandate
    Oliver Bruning (CERN)
    11/02/2019, 08:45

    • Detailed introduction of upgrade plans
    • Review of HL-LHC parameters
    • Brightness frontier in Run III following LIU upgrade

    Go to contribution page
  2. 2. Collimation upgrade plans
    Stefano Redaelli (CERN)
    11/02/2019, 09:00

    • Detailed introduction of upgrade plans
    • Definition of timeline for the WP5 upgrade: LS2 and LS3 plans
    • Recap. of the planned consolidation activities, impacts for the HL goals
    • Introduce the new design features relevant for HL: BPM collimators, new jaw design
    • Recap. status and plans for hollow e-lenses and crystals
    • Recap. of the last technical review for HL-LHC at Chamonix 2018 for collimation

    Go to contribution page
  3. 4. Overview of present collimation performance (20+10)
    Roderik Bruce (CERN)
    11/02/2019, 09:30

    • Evolution of settings and protected aperture for small beta*
    • Cleaning performance throughout the years
    • Performance of IR cleaning (incoming and outgoing)
    • Relevant system faults and HL-LHC protected aperture
    • System failures, availability and sources of downtime
    • Review of beam loss cases inducing damage

    Go to contribution page
  4. 5. Beam losses, lifetime and operational experience at 6.5 TeV (20+10)
    Belen Maria Salvachua Ferrando (CERN)
    11/02/2019, 10:00

    • Review beam losses and lifetime for protons and ions
    • Stability and reproducibility: collimation settings
    • Stability and reproducibility: orbit and optics
    • Tail population measurements
    • Experience with beam failures damaging the collimator

    Go to contribution page
  5. 6. Performance of new designs deployed in Run II and plans for Run III (20+10)
    Alessio Mereghetti (CERN)
    11/02/2019, 10:30

    • New jaw design and performance of BPM collimators
    • Operational performance of the TCSPM prototype in 2017-2018
    • Software improvements and performance in Run II: alignment and BPM interlocks (including machine learning)
    • Prospect for further improvements, including machine learning
    • Recap. of Run III layouts

    Go to contribution page
  6. 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…)

    Go to contribution page
  7. 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

    Go to contribution page
  8. 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

    Go to contribution page
  9. 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

    Go to contribution page
  10. 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

    Go to contribution page
  11. 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

    Go to contribution page
  12. 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

    Go to contribution page
  13. 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

    Go to contribution page
  14. 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

    Go to contribution page
  15. 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

    Go to contribution page
  16. 17. Status of LS2 production and prospect for LS3 (20+10)
    Inigo Lamas Garcia (CERN)
    12/02/2019, 08:30

    • Review where we are: status of ongoing production for LS2
    • Recap. of experience of LS1 production:
    • Plans for future productions: what can we expect for LS3.
    • Comments on the prospect for in-kind contributions

    Go to contribution page
  17. 18. Performance of new HL collimator designs (20+10)
    Alessandro Bertarelli (CERN)
    12/02/2019, 09:00

    • Status of collimator design. New collimators for IR cleaning
    • Summary of potential failure scenarios and resulting beam impact on the collimator jaws
    • Experience without beam with the prototypes
    • HiRadMat : overview and results. What is still missing? Needs for Run III (with LIU beams)
    • Status of results from radiation damage tests

    Go to contribution page
  18. 19. New materials: status (20+10)
    Federico Carra (CERN)
    12/02/2019, 09:30

    • Review of the performance of the MoGr without and with coating
    • How can we optimize the production of MoGR?
    • Other viable solutions: status of tests and validation [coated Gr or CFC]
    • What is missing to validate the CuCD?

    Go to contribution page
  19. 20. Review of vacuum performance (20+10)
    Giuseppe Bregliozzi (CERN)
    12/02/2019, 10:00

    • Review of vacuum tolerances for carbon-based materials
    • Proposed coating process for the collimator jaws
    • Observed 'problems' with the prototypes and proposed mitigation steps
    • IR7 vacuum tolerance in light of the vacuum bump test with beam
    • Other coating implementations for the HL-LHC other than on the collimator jaws

    Go to contribution page
  20. 21. Collimator controls upgrade plans (20+10)
    Alessandro Masi (CERN)
    12/02/2019, 11:00

    • Review performance of present system
    • Faults driving availability and expectations for HL-LHC
    Solutions being studied for controls upgrade, with timeline
    • Synergy with consolidation plans

    Go to contribution page
  21. 22. Crystal collimation for lead ion beams (20+10)
    Daniele Mirarchi (University of Manchester (GB))
    12/02/2019, 11:30

    • Layouts and beam test results
    • Operational experience with high intensities in 2018
    • Cleaning performance for ion beam collimation
    • Is it an operational alternative for improving ion beam cleaning?
    • Outcome of the Crystal Collimation day in Oct. 2018 (hardware options for LS2)

    Go to contribution page
  22. 3. Close-out
    12/02/2019, 16:00