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    User name feuerbac

    Log entry time 08:07:15 on February 6,2003

    Entry number 95031

    keyword=Owl Shift summary

    Shift summary:
    R. Feuerbach
    M. Camacho
    P. Solvignon

    Tasks: Take 45k event-equivalent for the 6.4.6 kinematic setting, and then move onto 6.4.5. Target polarization is ~37% at the start of the shift, so we expect to take about 52k "good" events.

    Setting 6.4.6 : Beam Half-wave plate OUT, RHWP at 6435
    Run 20782/1782/1762: Started 23:45, End: 0:51 Nevt = 273k/244k Good: 5.4k/5.8k
    Run 20783/1783/1763: Started 00:52, End: 1:56 Nevt = 273k/243k Good: 5.7k/5.4k
    Run 20784/1784/1764: Started 01:57, End: 2:59 Nevt = 268k/239k Good: 5.4k/5.0k
    Run 20785/1785/1765: Started 03:00, End: 4:03 Nevt = 270k/241k Good: 5.5k/5.2k
    Run 20786/1786/1766: Started 04:04, End: 4:54 Nevt = 200k/180k Good: 3.4k/3.5k
    Run 20787/1787/1767: Started 04:55, End: 5:32 Nevt = 200k/180k Good: 3.4k/3.9k
    A total of 57.4k "good" events at target polarizations between 37.5 and 36.0%.

    04:51 MCC was having problems with one of the cavities, and will take a few minutes to recover, so we stopped runs 20786/1786/1766. Beam was back at 4:54.

    05:32 Finished 6.4.6 dataset. Performing target polarization measurement.

    05:49 While the target is stabilizing, asked to have the IHWP put IN, and the RHWP set to 6650.

    05:54 Finished polarization measurement, with measurement of 36.0%. Beam requested.

    05:58 Started taking data for the 6.4.5 configuration.

    Setting 6.4.5 : Beam IHWP IN, RHWP at 6650
    Run 20788/1788/1768: Started 5:58, End: 7:03 Nevt = 270k/242k Good: 5.5k/5.0k
    Run 20789/1789/1769: Started 7:04, End: 7:58 Nevt = 232k/208k Replay needed