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    User name A. Camsonne

    Log entry time 00:48:02 on May 15, 2010

    Entry number 322681

    keyword=Compton electron run 22893

    One run with laser on and off cycle. Position is a bit undefined since the motion crashed in the middle, though it seems it was close from 0 mm. Efficiencies are low but threshold was high at 25. From the number of events in the tree I get an upper bound of efficiency ( 1 hit in one plane and any hit in another plane )

    All events plane A : 24332 A and B : 4728 19 % A and B and C : 469 1.9% A and B and C and D : 79 0.3%

    so rougly consistant with around 15% efficiency per plane.

    I will try different threholds after power cycling the motor front end.

    Figure 1