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    User name Carlos

    Log entry time 08:01:35 on November19,2004

    Entry number 137059

    keyword=Owl shift summary


    Shift crew:
    ===========
    C. Munoz Camacho
    C. Ferdi
    M. Potokar


    Shift summary:
    ==============
    Pretty smooth shift. Production runs all along. No big issues (expect for one more dead PA block). Trip rate remained reasonable when averaged over long periods. Beam current was somehow fluctuating at the end of the shift. Asked MCC several times for retunes.

    ----
    00:00 Shift started taking production data on LD2 (run 4804 underway).

    02:45 Some troubles rebooting Compton DAQ (see HALOG entry 137033).

    03:04 Bleedthrough measurement 1.16% (ELOG entry 1245650).

    04:26 During the last 15-20min, we were getting a slightly higher current: 4.2uA instead of 4.0uA. I asked MCC to bring current down to the usual value.

    05:16 Block 98 of proton array does not seem to be giving signal anymore (see HALOG entry 137041). This started at about 3am this morning.

    05:26 ROCs not reporting status at the end of run 4810 (see HALOG entry 137044). The run ended successfully in spite of that.

    06:29 After a "long trip", current got back to 4.1uA. Asked MCC to bring it down to 4.0uA. They said their BCM was reading 4.0uA already.

    06:45 Current went down to 3.8uA-3.9uA. I checked BCM readings with MCC and they were seeing the same values as me, so I asked to go up to 4.0uA.

    06:50 Hall C stopped running. This was followed by a high trip rate period. MCC can really decorrelate any two given variables.

    08:00 Shift ended with run 4814 underway (nDVCS production).


    Run summary:
    ============
    Run 4804 : nDVCS production, 300k events.
    Run 4805 : nDVCS production, 300k events.
    Run 4806 : nDVCS production, 300k events.
    Run 4807 : nDVCS production, 300k events.
    Run 4808 : nDVCS production, 300k events.
    Run 4809 : nDVCS production, 300k events.
    Run 4810 : nDVCS production, 300k events.
    Run 4811 : nDVCS production, 300k events.
    Run 4812 : nDVCS production, 300k events.
    Run 4813 : nDVCS production, 300k events.
    Run 4814 : nDVCS production running...


    Compton run summary (per our friendly RC request):
    ====================
    Run 9595 : 77.4% polarisation, S/N=48.

    Run 9596 : 74.7% polarisation, S/N=13.

    Run 9597 : 75.5% polarisation, S/N=13.

    Run 9598 : running

    Trips summary:
    ==============
    00:00-01:00 13 trips (4min BNA)
    01:00-02:00 09 trips (3min BNA)
    02:00-03:00 23 trips (8min BNA)
    03:00-04:00 12 trips (4min BNA)
    04:00-05:00 17 trips (7min BNA)
    05:00-06:00 12 trips (4min BNA)
    06:00-07:00 18 trips (6min BNA)
    07:00-08:00 16 trips (5min BNA)