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    User name brads

    Log entry time 23:03:32 on February 12, 2007

    Entry number 192717

    keyword=Shift instructions for Tuesday Owl

    Keep the VDC currents < 10 uA if at all possible. Under no circumstances
    exceed 20 uA.
    - watch the left arm in particular
    - VDC currents are displayed on Hall A Tools GUI
    - if the VDC currents exceed 20 uA even with a beam current of 0.1 uA then
    just abort that target and move on to the next one. If all targets run
    into problems, then end that kinematic setting and start working your way
    back up (ie. redo kinematic Y, then Z, ...). See updated run plan on the
    bulletin board.

    Go to 0.2 or 0.1 uA if you have to in order to keep the trigger rates
    reasonable in the Left arm as you go to forward angles.
    - beam quality could be an issue at low currents, watch the online replay
    for problems, weirdness. If the histos look poor, halog them and
    keep going provided that the VDC currents are OK (and the detector
    systems are otherwise functioning correctly).

    Prescale such that T1 and T3 are around 1 kHz for all kinematics/targets.
    - T2, T4 can be around 10-50 Hz

    Take two runs with 10^6 event each on each target.

    If you manage to finish Kinematic 'X' (theta=14 degrees), then turn
    around and
    work your way back up (ie. do Y, then Z). See updated run plan on the
    bulletin board.

    We had a problem moving to the Li target tonight.
    - See HALOG 192663 for more details
    <http://www.jlab.org/~adaq/halog/html/0702_archive/070212204129.html>
    - watch the video monitor to confirm you're in position

    Page the RC if you have any questions/concerns.


    A copy of this log entry has been emailed to: eschulte@jlab.org