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LHC Optimization Workshop: Addressing Challenges for Enhanced Performance

Feedback from a workshop focused on LHC optimization, addressing issues such as electron clouds, synchrotron radiation, and machine protection strategies. Plans for beam configurations, scrubbing, and physics experiments were discussed in detail.

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LHC Optimization Workshop: Addressing Challenges for Enhanced Performance

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  1. Summing Up S. Myers, Evian 9th December 2010

  2. General Comments • Excellent workshop • Well organised • Great preparations and presentations • Animated discussion • BUT too much FOOD! • Looking forward to proceedings • ? Follow up in LMC and New Operations committee

  3. Possible Issues with 900 bunches (75ns) • Electron Cloud • Cleaning at 450GeV good for 4TeV? • Synchrotron radiation • Will scrubbing need 25ns? • UFOs (Or is it something else?) • Why is there an energy dependence (no UFOs at 450GeV) • Machine Protection (~100MJ) Not Given

  4. Strategy 2011 Decide on beam and optics parameters,E,β*,crossing angle, emittance, Nb Commission LHC with new optics parameters, loss maps, MP etc 2 weeks ? Re-establish 2010 Collisions (150ns) with new configuration Chamonix Physics up to 450 Bunches (2 weeks) (200,300,400,450) 2 weeks ? Beam Scrubbing at 450GeV for 900 bunches (75ns) using 50ns beams 1 weeks ? Attempt Physics with up to 900 Bunches (2 weeks), (200,400,600,800, 900) ? 2 weeks Decide on 150ns or 75ns for rest of 2010

  5. Beam beam studies Decision 450/900 bunches?

  6. Estimates of Peak Luminosity 1440 • I assume (optimistically) • Head on beam beam shift .01(cf.0035 design) • Separating beams in LHCb? • Emittance 1.5urad (cf 3.5 design) • Nb = 1.5e11 • β* = 1.5m

  7. Estimates of Integrated Luminosity

  8. General Comments • Excellent workshop • Well organised • Great preparations and presentations • Animated discussion • BUT too much FOOD! • Looking forward to proceedings • ? Follow up in LMC and New Operations committee

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