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    User name R. Michaels

    Log entry time 11:05:28 on July30,2001

    Entry number 68341

    keyword=PZT mirror tests

    Tests with Parity DAQ to study PZT mirror effects
    R. Michaels, J. Grames, A. Vacheret, R. Suleiman.
    10:00 After parity run 1529 we decoupled Parity DAQ from L,R DAQ.
    Will now do some tests with PZT mirrors to vary the position in
    a helicity correlated basis. Insertable waveplate in. Toggle mode.
    Run 1530 - short dummy run
    Run 1531 - PZT at its off position (5 Volts).
    Run 1532 - PZTX changes to 9 Volts, Y remains at 5.
    The charge asymmetry became about -1700 ppm during this. Ouch.
    Run 1533 - junk.
    Run 1534 - PZTX to 5 (off position), Y to 9 Volts
    Charge asy is about +145 ppm
    Run 1535 - X at 5, Y at 7. Chg asy remains tame. (~170 ppm)
    Run 1536 - X at 7, Y at 5. Chg asy -700 ppm (excluding a ramping period)
    Run 1537 - X at 7, Y at 7. Chg asy -500 ppm
    Run 1538 - X at 5, Y at 5, i.e. both motions off
    11:04 End run 1538. Test finished. Back to normal running.
    The RWP feedback was off on during this test, but unfortunately
    the beam fast feedback was left on.