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LHC Collimation Review 2011

14–15 Jun 2011
CERN
Europe/Zurich timezone

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Contribution List

21 out of 21 displayed
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  1. 11. Welcome
    Dr Ralph Wolfgang Assmann (CERN)
    14/06/2011, 09:30
  2. 0. Introduction to LHC collimation
    Dr Stefano Redaelli (CERN)
    14/06/2011, 09:35
    Collimation system description: multi-stage cleaning, different planes, betatron and momentum. Definition of cleaning efficiency. Introduction quench limit. Hierarchy. Limiting physics processes: single-diffractive p scattering, ion fragmentation, ... Comments on hollow e-beam scrapers.
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  3. 1. Collimation setup and performance
    Daniel Wollmann (CERN)
    14/06/2011, 10:00
    How is it adjusted? How does it perform in LHC (loss maps: measurement and simulation). MD results at 3.5TeV and performance reach at 7TeV. Losses in luminosity production (dispersion suppressors). Measurement protons vs ions. Minimum beam lifetime. First SPS results BPM’s in jaws.
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  4. 19. Radiation to electronics
    Markus Brugger (CERN)
    14/06/2011, 10:50
    Issues with radiation to electronics in LHC, with focus on collimation insertions. IR7 versus IR3 sensitivity. Benefit of moving losses from IR7 to IR3.
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  5. 2. Collimation margins and beta*
    Roderik Bruce (CERN)
    14/06/2011, 11:10
    Stability of LHC machine (orbit, beta). Required margins for collimation setup. Connection collimation to beta*. What beta* can be achieved? Origins of limitations: protection condition, infrequent collimation setups, machine drifts.
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  6. 3. Beam-machine interaction: simulation benchmarking vs first LHC experience
    Mr Anton Lechner (Atomic Institute of the Austrian Universities, TU Vienna)
    14/06/2011, 11:30
    FLUKA models and predictions. Comparison between measurements and simulations. Safety margins.
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  7. 4. Collimator design: phase 1 and beyond
    Alessandro Dallocchio (CERN)
    14/06/2011, 11:50
    Short description phase 1 design. Second generation collimators. Improved jaw materials. Collimators for cryogenic regions (warm/cold solution).
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  8. 12. Collimation remote handling
    Keith Kershaw (CERN)
    14/06/2011, 12:15
    Highlights from work for collimation remote handling and remote survey. Plans.
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  9. 10. Expectations from Review
    Steve Myers (CERN)
    14/06/2011, 14:00
  10. 5. Collimation project upgrade plan and questions
    Dr Ralph Assmann (CERN)
    14/06/2011, 14:05
    Outline of collimation upgrade plan. What is planned when and why? What are the questions arising for this upgrade plan?
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  11. 7. Dispersion-suppressor upgrade IR3
    Vittorio Parma (CERN)
    14/06/2011, 14:35
    Foreseen work in IR3 for first long shutdown? Short description. Planning aspects.
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  12. 9. Proton beam performance with and without IR3 upgrade
    Adriana Rossi (CERN)
    14/06/2011, 14:55
    What is lost when not doing the IR3 upgrade? Gain from DS collimators. Performance reach without (see also morning presentation) and with dispersion suppressor collimators for protons.
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  13. 13. Ion beam performance with and without IR3 upgrade
    Giulia Bellodi (CERN)
    14/06/2011, 15:15
    Ion performance reach without and with dispersion-suppressor collimators in IR3. Other ion limitations (IR2, ...). Possible impact from delay of IR3 work on IR2 upgrade of dispersion suppressors.
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  14. 14. Energy deposition with and without IR3 upgrade
    Dr Vittorio Boccone (CERN)
    14/06/2011, 15:50
    Predicted energy deposition with and without IR3 dispersion suppressor collimators. Gain from collimators. Performance reach from comparing peak heat deposition with quench limit. Comparison with MD results.
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  15. 15. Impedance without IR3 upgrade
    Nicolas Mounet (Ecole Polytechnique Federale de Lausanne (EPFL)-Unknown-Unknown)
    14/06/2011, 16:10
    Impedance from tight collimation settings as achieved in MD. Will the beams be stable with impedance, taking into account stabilization from transverse damper and octupoles?
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  16. 8. Outcome Risk Review for IR3 Work
    Philippe Lebrun (CERN)
    14/06/2011, 16:30
    Conclusions from May review in EN/TE departments. Technical feasibility? Major risks? Any show-stoppers identified?
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  17. 16. Activation issues in dispersion suppressors
    Stefan Roesler (CERN)
    14/06/2011, 16:55
    Expected activation levels. Are additional limits expected on work in dispersion suppressors during later shutdowns?
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  18. 17. Radiation damage in dispersion-suppressor magnets
    Dr Davide Tommasini (CERN)
    14/06/2011, 17:15
    Can the radiation dose on unprotected magnets in the dispersion suppressors be accepted? What is the radiation hardness and can unacceptable damage to magnets be excluded, for protons and ions?
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  19. 20. IR3 warm upgrade
    Oliver Aberle (CERN)
  20. 18. Radiation to electronics issues
    Markus Brugger (CERN)
  21. 6. Warm upgrade IR3
    Oliver Aberle (CERN)
    Work in the long-straight section of IR3. Implementation of combined betatron/momentum cleaning. Work involved.
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