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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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LHC Status

Lyn Evans

LHCC, CERN 24th September 2008




Beam on turns 1 and 2
Beam on turns 1 and 2

Courtesy R. Bailey


Few 100 turns
Few 100 turns

Courtesy R. Bailey


Integer tunes
Integer tunes

Courtesy R. Bailey


Tune measurements
Tune measurements

Courtesy R. Bailey





No rf debunching in 25 10 turns i e roughly 25 ms
No RF, debunching in ~ 25*10 turns, i.e. roughly 25 mS

Courtesy E. Ciapala



Capture with corrected injection phasing
Capture with corrected injection phasing phase…

Courtesy E. Ciapala




Transformer failure
Transformer failure phase…

  • 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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