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    User name miham

    Log entry time 06:48:16 on May 03, 2009

    Entry number 270580

    This entry is a followup to: 270531

    Followups:

    keyword=Self Healing Gas Cerenkov

    The SWING shift crew noticed a change in the ADC spectrum of the 6th channel of the Left arm Gas Cerenkov. All the runs that we replayed (the OWL shift crew) look normal. The 6th channel ADC spectrum in all runs agree with the set golden run, that was set few days ago (Please see the attached figures ).

    Because of that I went back and tried to figure out when this change appeared. I realized that problem in the 6th channel disappeared with the run #1782 which is the first run that we started during the OWL shift. The last runs that had this problem is therefore #1781. This is very strange behavior. Maybe this Cerenkov has self healing capability or maybe (just maybe) this OWL crew possesses special forces.






    Run #1781



    Run #1782



    Later Run



    Later Run



    Later Run