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LHCC , CERN 24th September 2008

LHC Status. Lyn Evans. LHCC , CERN 24th September 2008. Kick response compared with theoretical optics. Dispersion 2-3. Beam on turns 1 and 2. Courtesy R. Bailey. Few 100 turns. Courtesy R. Bailey. Integer tunes. Courtesy R. Bailey. Tune measurements. Courtesy R. Bailey. Fast BCT.

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LHCC , CERN 24th September 2008

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  1. LHC Status Lyn Evans LHCC, CERN 24th September 2008

  2. Kick response compared with theoretical optics

  3. Dispersion 2-3

  4. Beam on turns 1 and 2 Courtesy R. Bailey

  5. Few 100 turns Courtesy R. Bailey

  6. Integer tunes Courtesy R. Bailey

  7. Tune measurements Courtesy R. Bailey

  8. Fast BCT

  9. Dump dilution sweep

  10. H wire scan

  11. No RF, debunching in ~ 25*10 turns, i.e. roughly 25 mS Courtesy E. Ciapala

  12. First attempt at capture, at exactly the wrong injection phase… Courtesy E. Ciapala

  13. Capture with corrected injection phasing Courtesy E. Ciapala

  14. Capture with optimum injection phasing, correct reference Courtesy E. Ciapala

  15. LHC longitudinal bunch profile Beam 2

  16. Transformer failure • At 23:30 on Friday a 12 MVA transformer at Point 8 failed • There is no spare unit but CMS has 2 similar transformers and a lot of over-capacity • The cryogenics at point 8 (7-8 and 8-1) was lost • The CMS transformer was installed on Saturday and Sunday

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