L1Calo Operations Summary

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Presentation transcript:

L1Calo Operations Summary Murrough Landon 8 August 2011 LHC ATLAS L1Calo

LHC Running well, several new records Record fills (>24 hours in stable beams, 100 pb-1 per fill) Instantaneous lumi 2.1e33 (increasing adiabatically) Integrated lumi for 2011 > 2 fb-1 (400 pb-1 last week) Turn around between dump and stable beams 2h12 Very short or no calibration breaks First programmed dump since June! Back to longer fills Some still ended by variety of faults: RF trips, UFOs, single event upsets, etc One dump by ATLAS BLM (“UFino” in inner triplet magnets)

ATLAS/Operations ATLAS still working fairly smoothly Some event building problems due to faulty pixel ROS One of a set of new ROS machines recently replaced News from the OPM meeting Nothing affecting L1Calo? Potential problem: magnet bus bar warming slowly... Would need major 10 day intervention to fix the underlying problem Hope to survive until winter shutdown

L1Calo Activities Generally smooth L1Calo operation Receiver gains updated for 4 LAr towers (HV change) 4 other EMEC-C towers need gain change LAr HV updated just after last L1Calo calibration Example plots for OHP updated For the first time since the 2008 combined cosmics! Online DQ spike DQ shifter in control room marked L1Calo as RED for 16 LB Short spike in rates turns L1Calo_Rates DQ RED for ~10mins Need to clarify instructions to DQ shifter... L1Calo errors seen in monitoring A side effect of event building problems (faulty pixel ROS) Also one L1Calo-CTP error: being investigated...