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    User name M.Shabestari

    Log entry time 08:34:18 on April 7,2008

    Entry number 230532

    keyword=Owl Shift Summary

    Owl shift summary April 7th 2008
    SL : Mitra Shabestari / Alexandre Camsonne
    TO : Mitra Shabestari
    3rd : Khem Chirapatpimol


    pi0 Production : Kinematics A
    BigBite = 54 degrees, LHRS = 20.5 degrees.


    00:00 - Shift started during controlled access

    00:39 Run 2472 (1 M)
    01:05 Run 2473 (1 M)
    01:31 Run 2474 (1 M)
    01:56 Run 2475 (1 M)
    02:22 Run 2476 (123 K) BB MWDC,dE, and E HV tripped off due to beam trip
    02:30 Run 2477 (323 K) BB MWDC,dE, and E HV tripped off due to beam trip
    02:39 Run 2478 (311 K) Test run
    02:50 Run 2479 (JUNK) BB HV tripped due to beam trip
    03:01 Run 2480 (935 K) HV trip
    03:36 Run 2481 (941 K) HV trip
    04:09 Run 2482 (1 M) good run, no trip
    04:34 Run 2483 (1 M)
    04:57 Run 2484 (355 K) HV trip
    05:17 Run 2485 (435 K) HV trip
    05:57 Run 2486 (791 K) HV trip
    06:22 Run 2487 (1 M)
    06:47 Run 2488 (824 K) HV trip
    07:25 Run 2489 (987 K) good run
    07:49 Run 2490 (266 K) HV trip
    08:17 Run 2491 (378 K) HV trip


    During the Owl shift we had frequent HV trips due to beam trip. HV trips happen when we observe "sharp spike" beam-trips.(See BCM snapshots in log entry 230512).