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    User name silwal

    Log entry time 22:23:31 on February 22, 2010

    Entry number 309690

    keyword=ET rate @ 30, 120, 240 Hz

    Attachments:: Runlog of charge feedback (~/apar/prex/feedback/runlog/).

    The charge feedback monitor was set to one of the injector bpms. Since the feedback analyzer only looks for bcm1/2, the feedback was not changing the PC setpoints. Nevertheless, it was analyzing data online.

    ffb_1308.log_ETrate: 30 Hz ffb_1310.log_ETrate: 120 Hz ffb_1311.log_ETrate: 240 Hz

    The ET rate is fine for 30 Hz.

    For 120 & 240 Hz, the rate comes up slowly.

    At 120 Hz, it takes ~ 40,000 events to get to ~ 118 Hz.

    At 240 Hz, the rate @ 91,000 events is ~ 150 Hz, with the rate going up very slowly.

    A copy of this log entry has been emailed to: rom@jlab.org, paschke@jlab.org, mercado@jlab.org, dalton@jlab.org



    Figure 1

    ffb_1308.log_ETrate

    Figure 2

    ffb_1310.log_ETrate

    Figure 3

    ffb_1311.log_ETrate