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    User name adaq

    Log entry time 18:15:37 on July 23, 1999

    Entry number 23511

    keyword=Beam Time Accounting
    Hall A

    7/23/1999 0800-1600
    Experiment #: E91-010
    Shift Leader: Humensky
    Shift Workers: Bogdan, Markowitz

    08000900100011001200130014001500Total Time
    Acceptable Beam
    in Use
    1 1 8 0 0 15 1 0 3.38333333333333
    Beam Available
    but Not in Use
    0 0 0 0 0 0 0 0 0
    Beam Not Available
    or Unacceptable
    0 0 52 1 1 45 0 1 4.61666666666667
    Accelerator Con-
    figuration Chage
    0 0 0 0 0 0 0 0 0
    Experiment
    Ready
    1 1 50 1 1 1 1 1 7.83333333333333
    Planned Config-
    uration Change
    0 0 0 0 0 0 0 0 0
    Unplanned
    Experiment Down
    0 0 10 0 0 0 0 00.166666666666667
    Hall not
    ready reasons
    Target 0 0 0 0 0 0 0 0 0
    HRSe 0 0 0 0 0 0 0 0 0
    HRSh 0 0 0 0 0 0 0 0 0
    Data Acq 0 0 0 0 0 0 0 0 0
    Other 0 0 0 0 0 0 0 0 0

    Comments: Smooth data taking 8-10am but with decreasing current 32uA->27uA. MCC requested two hours to work on tune from 10am-12pm. MCC reported a Hall A moller quad tripped at 11:10am, and they made a controlled access to fix it. Q3H tripped and was quickly recovered while MCC played with tune. 12:15 MCC reported trouble with the Hall A dipoles. 1:45 beam returns but at max of 10uA. Injector experts do some tests and determine cathode QE has dropped. 3:00pm Hall A beam stopper has pressure fault, safety guys were at MCC already. Crude est. of downtime is 1 hr for beam stopper. Injector experts are still determining best source of action for cathode. 3:30 update: cathode to be heat-cleaned and cesiated. 4hrs down.

    Data Entry by: Humensky