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    User name RM/KP/AV

    Log entry time 14:07:21 on January21,2003

    Entry number 92821

    keyword=Beam Studies

    Beam Studies
    ==========

    R. Michaels, K. Paschke, A. Vacheret

    Fast feedback was turned off.
    Parity IA feedback remains on.
    Start with 12 uA. Later to 10 uA.

    HAPPEX runs
    Injector............High energy...........Common PZT..........IA cell
    .........................................................X.............Y
    5172.................1422........................9..............5..............about 9.9
    5173.................1423........................9..............5

    Next run, take beam to 10 uA since ADC0_3 at injector is near saturating.
    Also some BPM's in hall near saturating.

    5174.................1424........................1.............5
    5175... same
    The inj. DAQ had a limit to stop at 20K events, we make this unlimited now.

    5176.................1425........................5.............9........IA seen to be 0 at start of run.
    Again inj. DAQ stops at 20 K after ~12 min. Ok, now sure to do carriage return
    when entering 0 into event limit (I guess that was the mistake)

    5177..................1426........brief repeat of above.

    5178..................1427........................5.............1
    5179..................1428........................9.............5
    5180..................1429........................5.............5

    After this run we turn off IA feedback. We note that at the end of run 1429
    we saw IA setpoint 4.25 and last Qasy 75 +/- 35 ppm

    Now we do some runs without IA feedback.
    Note also that the script ~apar/scripts/fastEpicsLogger was running since
    the start of these tests, but caused no harm. I have just updated this script
    to log the PZT X,Y among other things. The old script was saved.

    5181................1430........................1............5
    5182................1431........................5............9
    5183................1432........................5............1
    5184................1433........................9............5
    5185................1434........................5............5

    At the end of test
    1. Request fast feedback on.
    2. Restore parity IA feedback.
    3. Page Arun & RC to check harps.
    4. Will do access to fix L-arm Q2 trip.