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    User name Nanda

    Log entry time 21:50:05 on July11,2004

    Entry number 128307

    keyword=compton

    Compton backgrounds are bad. About 1.5 kHz/uA for electrons and 10kHz/uA even after optimizing pathlengths with dog legs. Beam steering in the chicane didn't improve background rates. Perhaps the bad beam quality is due to recent changes in the injector.

    Made access to troubleshoot photon detector signal problems. Changing amplifier channel cleaned up the oscillations. Still, the backgrounds are too high to see a clear compton spectrum in the photon channel.

    A short test run (with electrons only) gave polarization 78.3 +/- 3.8%

    Until backgrounds improves, please keep taking runs for "electrons only" analysis.