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    User name E. Cisbani

    Log entry time 08:05:10 on June21,2007

    Entry number 206138

    keyword=Owl shift summary

    Owl Shift Summary

    00:00 Radiator is in (position 5), running 3He (loop1), 30 uA,
    run number 1405

    01:15 After discussion with Hall C and Xiaodong we decided to
    continue running with radiator in at 30 uA for about 1.5
    more hours (see entry 206111)

    01:45 Beam current (downstream cavity) started to drop in our
    stripchart reaching slowly 26 uA,
    then moved back slowly toward 30 uA (see entry 206112)

    04:05 Radiator OUT, beam current at 50 uA, run 1411 started

    05:50 Radiator IN, beam current at 30 uA, run 1413 started

    NOTE:
    To maximize efficiency and avoid Hall A / C beam current delivery problems we coordinated with Hall C: we asked for 50 uA beam when Hall C ran at 40 uA.
    We got the planned 1:4 statistics ratio for IN:OUT radiator events.

    Down stream BCM has significantly drifted respect to Up stream one, 3 times during the shift (see entry 206112 and follows up).