• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name BoZhao

    Log entry time 00:03:52 on October26,2010

    Entry number 336742

    keyword=Swing shift summary

    SL: Bo Zhao
    TO: Min Huang
    3rd: Dimitri Margaziotis

    16:00 Take over the swing shift.
    16:30 End run 7881. Call MCC to ask for escort controlled access. Dave and Alexendre go to the hall to move LHRS to 40 degs. Change LHRS P0 = 1.981 GeV.
    17:20 LHRS angle has been set at 40 degs. Go to beam permit.
    17:25 Call MCC to ask for 2uA beam. Beam is back and BPMs are fine.
    17:33 Start calib. run 7882 for elastic 2c.
    19:05 Call MCC to ask for the compton tuning based on the schedule, but the compton expert is still on the way, continue to take data until they inform us.
    19:35 MCC call and they are ready to do compton tuning. Take beam away, mask the target movement and move target to empty.

    20:35 Jay calls and says they can not reduce the compton background rate further now and would like to analyze the data offline. Talk to Dave and decide to let MCC try compton tuning for another hour.

    21:00 Compton tuning is done. Carlos still needs half an hour to update calorimeter HV.

    21:40 Call MCC to ask for an escort controlled access since Carlos wants to check some calorimeter channels.

    21:42 Change the run configure from DVCSTopBot to TrigDVCS since the test is done.

    22:20 finish the calorimeter work in the hall. Call MCC to go to beam permit.

    22:30 Start beam recovery. BPMs look fine. Ask for harp scan and it looks good. Mask target movement and change target to LH2.

    22:50 Start to take elastic data on 2c setting with run 7887.

    Run run_type target events comments
    7881 calib LH2 92K elastic 2b
    7882 calib LH2 127K elastic 2c
    7883 calib LH2 139K elastic 2c
    7884 calib LH2 64K elastic 2c

    after compton tuning and calorimeter HV update

    7887 calib LH2 130K elastic 2c
    7888 calib LH2 taking elastic 2c