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    User name grimm

    Log entry time 00:02:35 on April 8,2006

    Entry number 169912

    keyword=Shift Summary

    Shift summary 16:00 - 0:00
    ===========================

    16:00 continued run 3941
    16:32 beam current unstable, followed by some beam trips (~15min)
    We see an anticorrelation between injector current and
    Hall A current.
    18:32 Beam current dropped slowly to ~7uA in the last hour.
    Requested 8uA.
    18:59 NA HV + GeN TS1 problems. TS1 had to be rebooted via hareboot26.
    see logentry 169897 from Sergey
    19:20 Sergey got the NA HV working again
    19:22 RC Tim Holmstrom called in. Sergey explained the situation
    GeN DAQ was restarted with startcoda
    19:24 beam current was over 8.5uA. Asked MCC to lower it to 8uA
    19:42 During GeN run 3744 we noticed a beam position glitch
    causing a rate of T1 ~3MHz at 8uA.
    Verified that the thresholds of SH, ND, and PS have not changed.
    20:04 Called MCC and asked for 8uA again ... dropped again back to 7uA
    20:28 Called MCC and asked for 8uA again ... was ~9.5uA in the
    begining of run 3745
    -> The good news is that the DCs did *not* trip.
    If there would not be that anticorrelation in
    Hall A/ Hall C beam currents, we could run with 9uA or
    even higher easily. But with each time the Hall C current
    drops, Hall A current rises by 1-2uA.

    21:31 Two Coil NMR: P=50.73%
    21:34 Beam is back at 8uA

    23:08 Neutron detector scalers showed zero rate
    -> rebooted ROC23 (Scalers/BB TDC) via hareboot26
    -> Coda: problems to connect to ROC3, reboot via Control+X
    in ROC23 terminal
    -> ROC 24 now got stuck (Big Hand Fastbus,genps1 port 7)
    rebooted using "Reset Control", button FASTBUS_CPU (gensfi1)
    -> getting up Gen CODA with startcoda
    => GeN Coda up and running


    Shift Log GeN runs
    =======================================================
    Time Run Type HW Eve Beam Parity Run

    15:33-16:44 3741 Production IN 8uA Happex 7262
    16:44-18:00 3742 Production IN 7uA Happex 7263
    18:01-18:59 3743 Production IN 8uA Happex 7264
    -> run stopped due to NA HV problems,
    GeN TS1 not responding
    19:24-20:28 3744 Production IN 7.5-8.5uA Happex 7265
    20:29-21:30 3745 Production IN ~8uA Happpex 7266
    21:32-22:38 3746 Production IN 8uA Happex 7267
    22:39-23:08 3747 Production IN 8uA Happex 7268
    -> run stopped, Coda problems
    see halog 169911
    23:30- 3748 Production In 8uA Happex 7268




    Shift Log Compton runs
    =======================================================
    Time Run HW Beam Polarization

    15:39-17:47 13308 IN 94.1% (!!) +-2.7%stat +-3.1%sys (end of run failed)
    17:48-19:15 13309 IN 80.9% +- 2.0%stat +- 3.1%sys
    19:24-21:22 13310 IN 83.4% +- 1.5%stat +- 3.1%sys
    21:23-23:30 13311 IN 82.6% +- 1.5%stat +- 3.1%sys (end of run failed)
    23:43- 13312 IN % +- stat +- %sys