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    User name M.Olson

    Log entry time 07:51:27 on June 2,2007

    Entry number 204023

    keyword=Owl Shift Summary

    Owl Shift Summary:

    M. Olson, E. Hrosinkova

    0045: JP back from hall (increased target density), requested to go to beam permit.

    0048: Called MCC asd asked for the beam (70uA)

    0115: Beam now nominally stable at 50uA, setting prescales.
    Start run 3977 to evaluate deadtime.
    0118: End run 3977 to adjust prescales

    0119: Start run 3978 (PS1=4370, PS2=4900, PS3=1, PS4=88, PS5,6,7=1)
    (DT=8%)

    0152: End run 3978 (He4, Q2=63, 50uA 1.25M)
    0231: End run 3979 (He4, Q2=63, 50uA, 1.25M)
    0306: End run 3980 (He4, Q2=63, 50uA, 1.25M)

    0349: Many beam trips during run 3981
    0352: MCC taking beam 5-10 mins for tuning
    Ending run 3981 (He4, Q2=63, 50uA, 1.20M)
    Asked MCC to call us back when they are ready to resume running

    0414: MCC called, ready to bring beam back...
    0417: Start run 3982, asked MCC to reposition beam on BPMA (x). It is currently -3.7mm. Should be -4.0mm (+/- 0.2mm)

    0432 Lost horizontal (vertical trace on scope) raster.
    0440 Rebooted VME crates (Hall A Tools VME crate resets), no help.
    0450 Paged (voicemail) Bill Gunning. No response.
    0500 Paged Bob Micheals.
    0510 Bob responded, directed me toward spare 24V supply
    0516 Spoke with MCC, requested controlled access.
    0520 Paged Jack Segal on Bob's recommendation. He agreed to come in.
    0525 MCC started survey of Hall A for controlled access.
    0540 Jack arrived and began swapping out 24V power supply
    0630 Horizontal raster restored, securing from controlled access.
    0637 Hall A to beam permit

    0643 Beam back in the hall, starting run 3983
    0726 End run 3983 (He4, Q2=63, 50uA, 1.25M)

    0728 Hall C staying at 40uA...asked for 60uA
    0733 End run 3984 to adjust prescales
    0734 Start run 3985

    Run 3985 in progress at end of shift