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    User name D.Wang

    Log entry time 22:57:32 on October19,2009

    Entry number 295764

    keyword=compton test runs summary

    08:26 moved Edet to 1 mm to take a short coincidence runs for checking rates.

    run20523 coincidence run, FADC triggered on SaclayDAQGammarTrigger. Polar gate 20 ms. beam current 100. prescales 4, 100, 100. 2 plane coincidence. or width 2. Short run.

    08:38 moved Edet to -3 mm.
    rocs hang up. Did coda reboot

    08:46 Asked MCC for 15uA.

    run20524 coincidence run, FADC triggered on SaclayDAQGammarTrigger. Polar gate 27 ms. beam current 15. prescales 1,1,100. 2 plane coincidence. or width 2.

    09:17 Back up to 100uA

    run20525 coincidence run. Polar gate 20 ms. beam current 100 uA. Other settings the same as run20524.

    set Polar gate to 27 ms.
    Set FADC trigger to Etrigger.

    run20526 electron only run. FADC triggered on Etrigger. Polar gate 27ms. beam current 100uA. prescales 1,1,100. 2 plane coincidence. or width 2. something happened in the run. the electron background dropped suddenly at the time 10:25. See halog entry.

    changed FADC trigger back to standardRun.
    moved Edet to garage.
    back to production.