Requirements and Design Criteria for the LHC Collimation System

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5$ (3$& Contents 1) The challenge High stored energy and energy density Super-conducting environment Efficient and tight collimation 2) Irregular proton losses Dump failure modes Beam impact at collimators 3) Regular proton losses Running at the quench limit (intensity and beam lifetime) Heat load Efficiency and imperfections (halos) 4) Outlook
5$ (3$& What is collimation for the LHC? Blocks of material that are put closest to the beam such that: 99.9 % of protons lost (e.g. with 1 h beam lifetime at 7 TeV) are captured in the collimators. Less than 0.1 % of protons lost can escape and can impact in the SC magnets, which otherwise quench. Less than 0.002 % of the stored beam intensity can be lost at any place in the ring other than the collimators, because otherwise magnets could be damaged. Any beam loss is detected immediately at the collimators and the beam is dumped within 2-3 turns. (top energy)
Page 1: 5$ (3$& Requirements and Design Cri
Page 5 and 6: 5$ (3$& Challenge: High Stored Ener
Page 7 and 8: 5$ (3$& Challenge: Super-Conducting
Page 9 and 10: 5$ (3$& Challenge: Tight and Effici
Page 11 and 12: Equipment failures Equipment errors
Page 13 and 14: 5$ (3$& Abnormal dump actions Beam
Page 15 and 16: 5$ (3$& Contents 1) The challenge H
Page 17 and 18: 5$ (3$& Two stage collimation syste
Page 19 and 20: 5$ (3$& Secondary and tertiary beam
Page 21 and 22: 5$ (3$& Running at the quench limit
Page 23 and 24: 5$ (3$& Summary and Outlook 1 Beam
Page 25 and 26: 5$ (3$& Additional slides
Page 27 and 28: 5$ (3$& Inefficiency versus imperfe
Page 29: 5$ (3$& Multi-turn properties and i

Requirements and Design Criteria for the LHC Collimation System

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