• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name A. Deur

    Log entry time 20:34:28 on August20,2003

    Entry number 112220

    Followups:

    keyword=shift summary, part 1

    Finishing run 3796, second run at kinematics 10.13
    16:12: end run 3796, 3.1 M evts. changed next runs coda limit to be 3 M
    16:13: start run 3797
    16:28: start run 3798
    we have now 12.2 M coda events for kin 10.13, target spin=0 deg, beam 1/2 plate OUT.
    16:41: Insert beam 1/2 wave plate
    16:41: Start run 3799. First run of kinematics 10.13 with beam 1/2 wave plate in, target spin at 0 degree
    16:53 stop run 3799.
    At the end of this run, current went up from 6.8 to 7.2 uA, see separate entry.
    Try to start right arm coda, but failed. We don't know why. Run 3800 is junk
    16:55 start run 3801 associated left arm run is 23800 (we will correct that for next run)
    17:08 Start run 3802 associated left arm run is 23802
    17:22 Start run 3803
    17:28. Beam current slowly going down from 7.2 to 6.8 Called MCC to ask for 7.5 uA. Now deadtime is 12%. So I asked for 8 uA.
    17:34. Stop run 3803. We have now 12. M coda events for kin 10.13, bhwp IN. Rotate target spin to 270 degree
    17:39. Start run 3804. bhwp IN. Rarget spin is 270 degree
    17:50. Start run 3805.
    18:02. We have now 6 M coda events. Called MCC and asked for beam half wave plat out
    18:03. Start run 3806.
    18:15. Start run 3807.
    We have now 6 M coda events.
    18:29. Stop run 3807, Done with kinematics 10.13. Called MCC to mask the target, put in the ref cell. target spin to 0 degree. Set the rHRS to 1.525 GeV/c, Iseptum 191.75 (readback).
    18:53 Asked for beam back (9 uA).
    18:55 Beam back. Start run 3808: empty ref cell for Kin 10.14. I=8.9 uA, rate is 370 Hz.
    19:05 Stop run 3808. Fill ref cell with N2.
    right arm coda start run failed again: run 3809 is junk again for next run, left/right arm will not be synchronized
    19:08 Start run 3810 N2 ref cell. PS1=6 ,PS2=9
    19:13 Stop run, move to pol He3 cell
    19:19. Asked for beam back
    19:21 Start run 3811 pol 3He cell, 0 deg, bhwp out. PS1=1 ,PS2=2. Took 2.5M events
    19:33 start run 3812.
    19:39 Stop run 3812: 1.5 M events
    total 0 deg, bhwp out = 4M
    19:39 insert bhwp
    19:39: start run 3813. target spin now at 0 deg bhwp is out. 2M events
    19:47: start run 3814. 1.9M events
    total events for 0 deg, bhwp in = 3.9M
    19:55: rotate target spin to 270 degree.
    20:00: start run 3815. target spin now at 270 deg bhwp is out. 3.2M events
    20:13 Stop run 3815, Done with kinematics 10.14. Called MCC to mask the target, put in the ref cell. target spin to 0 degree. Set the rHRS to 1.417 GeV/c, Iseptum=177.5 (readback). Meanwhile, performing a NMR.