• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name Allyn

    Log entry time 00:00:41 on June29,2001

    Entry number 64932

    keyword=Swing Shift Summary

    No beam at start of shift due to ESR power outage. Recovery process has begun, but will most likely take until at least 20:00.
    16:00- No beam
    17:00-17:12 NMR measurement by V. Sulkowsky P=44.7%(HALOG 64901)
    17:12-17:20 EPR measurement by Wolfgang -unreliable (HALOG 64902)
    17:30 Target back in polarized 3He position. Holding field at 270 degrees, transverse.
    17:30 Ed Folts out of Hall. The plan is to do an ARC energy measurement as soon as MCC can deliver beam while waiting for the magnets to ramp.
    17:40 Second NMR performed because EPR was not so good.
    NMR gives P=44.6%, so the polarization is fine, the EPR measurement was just bad. (HALOG 64903)
    18:38 Lasers off, go to the empty target position for ARC measurement.
    18:38 Begin cycling Q2, Q3 left arm
    18:48 Finished cycling Q2, Q3 left arm, began cycling Q2,Q3 right arm
    18:56 Rotating holding field to 0 degrees
    18:57 Finished cycling Q2, Q3 right arm
    We noticed that the left arm dipole is "stuck" at the momentum setting 1.4438 Gev/c, just below the desired setting of 1.4550 Gev/c. We are changing the momentum settings to see if it responds. There is no response. J.P. contacted. Problem solved. Left and right arm Q2, Q3 cycled again.
    (See HALOG 64904, 64906 for magnet recovery details).
    19:01 Longitudinal lasers turned ON.
    19:04 Beam restored at 3 microamps for ARC energy measurement.
    19:35 Beam is not so good. Problems with ARC energy measurement
    (see HALOG 64907).
    Doug is going to get them to restore beam to the hall.
    19:58 Beam half-wave plate out.
    20:02 Beam back in hall at 1 microamp, BeO target in.
    20:09 Spot looks good on BeO target. Moving to polarized 3He position.
    20:17 Start of 10 microamp beam.
    20:25-21:31 Run 835: production run
    21:31-21:50 Discovered and corrected IOC problems (HALOG 64922)
    21:50-22:51 Rub 836: production run- no beam current info in beginning of
    run file.
    22:52-23:27 NMR measurement by V. Sulkowsky P=42.1% (HALOG 64931)
    EPR measurement by Xiaochao P=42% (HALOG 64930)
    23:27- Run 837: production run handed off to next shift.



    Lrun# Rrun# Parity_run# Start End Comments
    1835 20835 1013 20:25 21:31 Beam was a bit unstable
    1836 20836 1014 21:50 22:51 Again, lots of trips
    1837 20837 1015 23:27 --- Passed to next shift