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LHC Status Sun Morning 20 -Mai Bernhard Holzer, Jan Uythoven

LHC Status Sun Morning 20 -Mai Bernhard Holzer, Jan Uythoven. Status yesterday morning . Fri Morning. ... investigating IP8 situation and / or bunch losses * separation in IP8 checked during night shift: ok * crossing angle for the diagonal leveling checked,

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LHC Status Sun Morning 20 -Mai Bernhard Holzer, Jan Uythoven

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  1. LHC Status Sun Morning 20-Mai Bernhard Holzer, Jan Uythoven Status yesterday morning

  2. Fri Morning ... investigating IP8 situation and / or bunch losses * separation in IP8 checked during night shift: ok * crossing angle for the diagonal leveling checked, based on BPM readings (at s = 22m) hor: ≈ 0 μrad vert. ≈100 μrad Sat Morning Plan:lumi with new filling scheme

  3. Sat Morning 09:16h injection for physics again: very clean and clear injection with new filling scheme !!! 09:46h ramp / squeeze / collisions: without any trouble 10:24h stable beams

  4. Sat Morning bunch intensities: new scheme old scheme

  5. Sat Morning still: losses of single bunch intensities in the very first part of “stable beams” but very much reduced. ΔI/I ≤ 20% • 10:52h dump: BLM L1 spurious trigger ... difficult to stay politically correct • 13:14h pre-cycle, inject, ramp-squeeze-adjust-lumi • again: new scheme

  6. Sat Morning This time losses are even better ! Maximum losses after 30 minutes stable beam 2% bunch pattern after declaring stable beams

  7. Sat Morning 70% direct comparison: single bunch losses with new / old scheme 2%

  8. Sat Late stable beams, no problems

  9. Sat Night stable beams, ... price (that we happily are willing) to pay: Kicker Temperatures 95% we might have to wait a bit before next injection, idea: soft start, check field 05:20h programmed dump

  10. Sat Night / Sun Morning 04:40h abort gap cleaning required reason not yet clear 05:37h Electrical glitch. Lose sectors 45, 56, 78, 81 and RD1.LR1 and RD34.LR3

  11. Sat Night latest statistics added since Tursday

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