Tue :25 Beams dumped due to RF vacuum interlock

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Presentation transcript:

Tue 15.11.11 08:25 Beams dumped due to RF vacuum interlock Reset after checks with piquet 09:53 Triplet R2 power converter problem, access required Replace sub-module 11:50 Access required for the RF vacuum point 4. RF module tripped again: ion pump stop. Connector, PS changed. In shadow of accesses: CMS forward detector entering in UL55 to check a cable trim the ramp function for RF total voltage to have 13MV at flat top changed monitor factor on BLM’s  factor 2 relaxed BLM thresholds in cells 10 and 11 in DS’s of IR1/2/5 (MQ + MB). Adjustment MKI8 IQC thresholds for delay and length after prepulse fine synchronisation. 13:50 Start pre-cycle 16-11-11 LHC morning report

Adjusted RF voltage 16-11-11 LHC morning report

MKI8: BCT-TI8 - AGK - kick pulse synchronisation (bucket 5141) Beam position difference w.r.t. kick pulse in comparison with 2010 nominal position: 104ns 16-11-11 LHC morning report

Tue 15.11.11 16:20 Injection 17:15 Filled 358 on 358 bunches. Nominal ion intensity. 17:23 Ramp. 17:43 Squeeze. 18:22 Stable beams. Fill #2297. Peak luminosity: 3.5e26 cm-2 s-1 (35% of 7 TeV design lumi) 1.8MJ of stored energy per ion beam. BFPP losses OK (still 40% f dump threshold with 2.2 times higher luminosity and increased BLM thresholds). Fine. 22:29 G. Schneider is going to start the injection of gas in LHCb. 16-11-11 LHC morning report

New Ion Intensity Record 200ns_358b_356_336_0_24bpi15inj_IONS B2 B1 16-11-11 LHC morning report

New Ion Luminosity Record 16-11-11 LHC morning report

Losses in Collision 16-11-11 LHC morning report

IR2 16-11-11 LHC morning report

IR5 16-11-11 LHC morning report

IR3 16-11-11 LHC morning report

Vacuum evolution on VGPB.219.1R8X 16-11-11 LHC morning report

Wed 16.11.11 00:05 Preventive beam dump due to cryo problem in 34. Fault on the power converter for the cold compressor. Collected 4-4.5 mb-1 per experiment in fill #2297 (>40% of full 2010 run). 16-11-11 LHC morning report

Peak Luminosity 3.5e26 cm-2s-1 16-11-11 LHC morning report

Integrated Luminosity 6 mb-1 4 mb-1 2 mb-1 ATLAS offset??? 16-11-11 LHC morning report

Ahead Today: Afterwards (tonight, early morning): Pending: Cryo recovery: ~9:30 Ready for injection: ~11:00 Then: p-Pb MD plus pilot physics run Afterwards (tonight, early morning): Back to Pb-Pb physics. Pending: Some optional transverse damper work: see list from Wolfgang. Access (if opportunity arises): Installation of four BLMs for IP2 Aperture checks (4hours). Ready from Wednesday onwards. LDM repair in tunnel, about 1 hour 16-11-11 LHC morning report

LPC on p+ Pb LHC morning report 16-11-11

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