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    User name eschulte

    Log entry time 01:00:33 on October 17, 2006

    Entry number 187357

    keyword=Run Coordinator Summary 10/15 Day Shift through 10/16 Swing Shift

    10/15 Day shift started with further carbon single foil running with the
    A10 kinematics. Data taking went smoothly through the end of Swing shift
    on 10/15. A loss of communication with ioch14 (HRS-L magnets) led to
    some confusion when the ioc appeared to reboot properly, but the Hall A
    Tools MEDM screen did not update to reflect this. The tech on-call was
    consulted. He came in when we though we might need an access to
    re-establish communications. The access was avoided when he recognized
    the problem he had seen before, and quit and restarted the Hall A Tools.
    This resolved the non-updating screen problem. Data taking on carbon
    continued until just 07:00 10/16.

    At approximately 06:55 on 10/16, the ARM came to the hall to put Hall A
    into restricted access for the change over to Q^2=1.3 GeV/c. The survey
    went well, with Ed Folts turning of the Compton polarimeter laser, which
    was powered up at the time of the sweep. The ARM was unwilling to survey
    the transfer line until the laser was turned off. A bit after 07:00 Dave
    Meekins came over to do the target change back to hydrogen. This went
    well and without incident. The target change-over was completed by
    09:30. By 08:00 the hall was busy with surveyers and technicians. Both
    HRS were surveyed in place, moved, and resurveyed. The survey was
    completed by 15:30. Several smaller maintenance activities, including
    work on serial cables causing communications problems commenced. The
    Compton polarimeter group worked on the polarimeter during the access.

    Shortly before 10:00 the CHL 4K helium flow was shut of to the hall. An
    investigation of the incident revealed a communication problem between
    target and cryo groups. The problem was resolved and coolant flow was
    restored. The target partially warmed up, and J.P. restored it to
    operating conditions. A caution: One must be very careful adjusting the
    JT valves with the 4K flow, as the response is even more sensitive than
    usual. Without care, we can wind up tripping closed the feed valve
    supplying coolant to the hall, thus warming up the target. Very bad.

    Shortly after 15:30 Ed Folts reported that work in the hall was completed
    and I called MCC to have the hall returned to Beam Permit status. The
    sweep of the hall started around 16:30 and was completed by about 16:50.
    MCC reported that they would be sending tuning beam by 17:15. After the
    re-establishment of beam to the hall, the Compton group did some work
    with the Compton polarimeter. They had some difficulties, and gave the
    beam back to the shift crew, who completed the requested harp scans,
    re-established the 2mmX2mm raster, and prepared to start taking pointing
    data.

    The day ended with pointing data (seive slit) with the single foil carbon
    target. The going is slow. It will take several hours to complete all
    of the pointing measurements.

    It was a good day!