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    Make New Entry, Make Followup Entry

    User name R. Michaels

    Log entry time 05:56:22 on November16,2009

    Entry number 300286

    Followups:

    keyword=low-I test runs

    05:20 Ask for 2 uA.

    We will take short runs at 2, 14, and 28 uA for a few minutes.
    Purpose: study background, etc, at low and intermediate rates.
    Would like to at high current but not sure the VDCs will
    work well. Will monitor the VDC current.

    05:22 Start Parity DAQ 13994

    05:30 VDCs at 4 kV. Start runs 25527 / 5075.

    Runs prior to this useless (VDCs were not up yet, my
    shift partner started it too early.)

    Rates at 2 uA

    L-HRS T1 = 8.6 kHz
    R-HRS T1 = 2.0 kHz

    05:39 Ask for 14 uA. Increase ps1 to keep DAQ rate 1 kHz

    Run 25528 / 5076 at 14 uA.

    L-HRS T1 = 53 kHz
    R-HRS T1 = 12.6 kHz

    The VDC currents look fine ( .lt. 10 uA).

    05:47 Ask for 28 uA. ps1 bumped up.

    Run 25529 / 5077

    L-HRS T1 = 103 kHz
    R-HRS T1 = 24 kHz

    05:52 End low-I runs. Turn VDCs off. Return to production.

    05:54 Back to 70 uA. Production runs: 13395 / 25530 / 5078