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    User name Ramesh

    Log entry time 13:08:14 on December17,2007

    Entry number 221651

    keyword=Owl shift (Dec 17) summary

    00:45 Can't go beyond -3mm w/o ion chamber trips. Start Pb scan (2x2 mm raster)

    Computer center calls: There was a hardware fault on the central comptuer system, it rebooted
    (or was rebooted) but came back with inconsistent files, so it's doing an fsck equivalent
    procedure. Estimate few-to-several hours to finish.

    00:55 Start Pb position scan. 10uA, raster 2x2, can only scan on right side.
    Whoops. No DAQ. Runcontrol crashed, and cannot be reset. Any attempt to
    run killcoda (or anything else) freezes the terminal.

    01:55 Will do a quick position scan on the Pb target with 1mm x 2mm raster.
    Just going to record scalar rates to get a rough idea of the position of the
    edge of the target. Will follow up when DAQ is back.

    BPM A x | BPM B x | rad29_p1 | T1 (Hz) | T3 (Hz) | I_BCM
    ----------------------------------------------------------------
    -2.683 | -2.940 | 0.040 | 1.30e4 | 1.42e4 | 5.30
    -2.02 | -2.13 | 0.034 | 1.09e4 | 1.22e4 | 5.25
    -1.05 | -1.00 | 0.032 | 1.02e4 | 1.13e4 | 5.25
    -0.03 | -0.06 | 0.039 | 1.02e4 | 1.12e4 | 5.24
    1.07 | 0.99 | 0.031 | 1.03e4 | 1.10e4 | 5.23
    2.09 | 2.00 | 0.025 | 1.06e4 | 1.11e4 | 5.25
    3.12 | 3.03 | 0.035 | 1.01e4 | 1.04e4 | 4.83
    3.35 | 4.01 | 0.066 | 0.88e4 | 1.62e4 | 4.83

    2.96 | 3.05 | 0.078 | 0.93e4 | 1.14e4 | 4.89 Raster = 2x2
    2.95 | 2.99 | 0.075 | 0.93e4 | 1.27e4 | 4.92 Raster = 3x2
    2.94 | 2.96 | 0.162 | 0.92e4 | 1.36e4 | 4.92 Raster = 4x2

    -2.1 | -2.0 | | 1.08e4 ! 1.18e4 ! 4.90 Raster = 4x2
    -2.1 | -2.0 | | 1.04e4 | 1.16e4 | 4.88 Raster = 2x2

    SOMETHING happens between +3 and +4mm central position (+3.5 and +4.5 for
    the raster edge), but it lowers the T1 rate a little and raises the T3 rate
    a lot, so we need to look at real data to see what's going on. Couldn't get
    past +4mm.

    02:25 Finished all of the scans we can do without DAQ, so ask for beam to be
    turned off.

    05:50 MCC asks for empty target so they can put in some pulsed beam for tuning,
    presumably in preparation for the pass change.

    ABU for owl shift
    (most of 60 min. from previous shift)
    00:00-00:45 (empty target position scan)
    01:55-02:25 (Pb position scan - scalars only)