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    User name LeRose

    Log entry time 00:05:28 on February 08, 2009

    Entry number 259622

    keyword=Shift Summary (swing)

    2/7/2009 Swing Shift
    SL : John LeRose
    TO: Yunxiu Ye and (Yi Qiang at start)
    3rd: Matthew Posik

    left HRS 45 degrees 0.6 GeV/c
    checked raster with BeO target
    MCC 5.3 x 6.58 gives 4 x 3

    Spent some time optimizing BigBite HV

    program is reference cell presssure scans
    2 runs "buffered" + 2 runs "unbuffered" each pressure
    16:37 start reference cell pressure runs 1077 20079 (buffered)
    Ref cell pressure = 815 torr
    16:48 runs 1078 20080 (buffered)
    Ref cell pressure = 815 torr
    17:00 runs 1079 20081 (unbuffered)
    Ref cell pressure = 816 torr

    17:14 ref cell pressure = 605 Torr
    17:15 start 1080 20082 (unbuffered) Junk
    17:25 start 1081 20083 (unbuffered) Junk
    17:26 ref cell pressure = 605 Torr
    17:28 Yi announces that he didn't properly change the reference cell
    pressure when he went from 815 to 605 (N2 was contaminated)
    So, we have to start over! 815 is oK but 605 is not.
    starting at 0
    ref cell pres 006 Torr
    17:35 start 1082 20084 (unbuffered)
    17:46 start 1083 20085 (unbuffered)
    17:49 ref cell pres 006 Torr
    17:59 start 1084 20086 (buffered)
    18:10 problems with roc9 and roc10
    restarted coda etc. etc.
    18:34 Bryan checks it out says we have a CAMAC crate failure in
    the Hall.
    18:39 Called for Controlled Access
    22:00 going back to beam permit

    checked raster etc.
    runs 1085-1087 20087-20091 assorted Junk
    22:45 Ref Cell pres 006 Torr
    22:49 start runs 1088 20092 (buffered)
    22:54 Ref Cell pres 006 Torr
    23:01 start runs 1089 20093 (buffered)
    23:04 Ref Cell pres 006 Torr

    23:11 Ref Cell pres 103 Torr
    adjusted prescales
    23:13 start runs 1090 20094 (unbuffered)
    23:16 Ref Cell pres 103 Torr
    23:23 start runs 1091 20095 (unbuffered)
    23:31 Ref Cell pres 103 Torr
    23:35 start runs 1092 20096 (buffered)
    23:45 start runs 1093 20097 (buffered)
    23:46 Ref Cell pres 103 Torr
    23:50 Problems with 20097 (getting no events)
    Rebooting etc at end of shift
    almost done with 100 Torr need one more buffered run