LHC Collimation Review 2011

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CERN
Mike Seidel (PSI), Ralph Assmann (CERN)
Description
The "phase 1" of LHC collimation has been fully commissioned, allowing a stored beam energy in the LHC of more than 80 MJ. Its performance has been characterized with beam at 3.5 TeV. This review is considering the present performance, possible limitations in future operation and plans for the upgrade of the system. In particular, it should be reviewed whether the upgrade work in the IR3 dispersion suppressors can be delayed by three years without limiting the LHC performance at 7 TeV.

Review Committee:
Mike Seidel (PSI, chair), Tiziano Camporesi (CERN), Wolfram Fischer (BNL), Brennan Goddard (CERN), Mike Lamont (CERN), Thomas Markiewicz (SLAC), Nikolai Mokhov (FNAL), Andrzej Siemko (CERN), Johannes Wessel (U. Muenster)

Charge:
Review collimation status and upgrade plans. Advise on the following questions:
  1. Are collimation performance and limitations properly analyzed and adequately addressed by upgrade plans?
  2. Can the collimation upgrade in the IR3 dispersion suppressors, presently foreseen for the 2013/4 shutdown, be delayed by three years without limiting LHC performance at 7 TeV?
  3. Have any issues or risks been overlooked that should be addressed in the collimation upgrade plan?
Produce a report, summarizing the recommendations and findings. The committee report is linked as document in the "MATERIAL" section.
document
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