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    User name R. Michaels

    Log entry time 02:03:31 on February 4,2002

    Entry number 81684

    keyword=VDC efficency recovery timescale

    Plot 1 shows how the efficiency recovers over time for the worst 2 chambers.
    (Oops ! That should read chamber 3 and 4 in the plot label)
    The time constant is 7.8 +/- 1.6 hours (roughly).
    Plot 2 shows where the efficiencies are now. We decide to ask for beam
    and will start data taking when the worst two reach 90%, whic should be
    in another hour or so.

    FIGURE 1

    FIGURE 2