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    User name A. Camsonne

    Log entry time 23:24:38 on May 10, 2010

    Entry number 322092

    keyword=INFN GEM source + cosmics in EEL - coincidence trigger - Run 1131

    I set up the two scintillator paddles in coincidence with the chamber in between. I put the Ru106 and Sr90 source on the scintillator. It seems a few electrons from the sources make coincidences. HV for the GEM is 4000 V