• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name A. Deur

    Log entry time 16:01:57 on August17,2003

    Entry number 111571

    keyword=Run Summary

    Continuing P0=2.213 GeV/c (target collimators off)
    8:12 run 3668: N2 139 psig. ps1: 21, ps2.I=4.8 uA Raster ON (end of run entry wrong)
    8:18. Stop run, move to P0=2.147 GeV/c (-3%), Iseptum readback=275.25 A
    Vent N2 and put ref cell out. Moved C12 in. requested raster off
    8:34 Asked for beam back but MCC said that they cannot deliver. They may have to replaced a trim card.
    8:42 Run 3669. C12 multifoil in. raster off PS1=21 Ps2=40 I=4.8 uA Couple of beam trip during the run. 1.12 M
    8:47 Stop run, Asked for beam off. Move to P0=2.089 GeV/c (-5.6%), Iseptum readback=267.5 A
    9:03: Beam back after short FSD trip.
    9:03 Run 3670. C12 multifoil in. raster off PS1=21 Ps2=40 I=4.8 uA 1.3 M
    9:08: Stop run. Called for access to put target collimator in.
    Changed HRS+septum momentum to 2.279 Iseptum readback:293.25
    We cycled the quads. During access (after we opened the scattering chamber) did NMR and EPR.
    9:48: Access done. Asked for beam back.
    9:49 Beam back, adjust PScalers
    9:52. Start run 3671 C12 multifoils in. raster off PS1=3 Ps2=5 I=5.1 uA Events: 1.0 M
    9:56. End run. Beam down. We changed HRS+septum momentum to 2.213 Iseptum readback:290.0 (the HRS/septum momentum mismatch is on purpose. That's the goal of the next run)
    10:10 Beam back (asked for 6 uA).then beam down (FSD trip)
    10:13: Run 3672. C12 multifoils in. raster off PS1=9, PS2=15 I=5.5 uA. Events: 1.1 M
    10:19 stop run, set septum to 284.5 (this is the readback). Now septum is matched to HRS.
    10:22. Start run 3673: C12 multifoils in. raster off PS1=3 Ps2=5 I=5.6 uA Events: 1.2 M
    10:27. Stop run and beam. Move to empty position
    10:35. Asked for beam back. Checked pscaler
    10:36. Start run 3674 empty target. raster off PS1=1 Ps2=2 I=4.9 uA Events: 1.2 M
    10:41. Stop run, requested raster on
    10:42 start run 3675 empty target. raster on PS1=1 Ps2=2 I=4.9 uA Events: 1.2 M. Checked raster size: Fine.
    10:47. Stop run, requested beam down to go to ref cell (empty)
    10:50 asked for beam back.
    10:52 Cheked pscalers. Low scalers -> asked for 10 uA. Changed left arm ps3 to 2 and ps4 to 6.
    10:55 start run 3676 empty ref cell. raster on PS1=1 Ps2=2 I=8 uA Events: 0.18 M.
    11:00 Stop run. Requested to go back at 5 uA, Changed back left arm ps3 to 1 and ps4 to 3. Filled the ref ce4ll with N2
    11:04 start run 3677 N2 ref cell. raster on PS1=10 Ps2=15 I=5.1 uA Events: 1.9 M
    11:10 Stop run, beam off to move to multifoils target.
    11:15 Asked for beam back but FSD trip.
    11:19 Beam back. start run 3678. C12 multifoil. raster on PS1=7 Ps2=20 (I should have put less) I=4.8 uA Events: 1.4 M
    11:24 Stop run, beam off to move to pol He3 target.
    ***start He3 data taking (will continue the acceptance/optics after)*****
    11:34 Beam back. start run 3679. pol He3 elastic. raster on PS1=3 Ps2=4 I=4.8 uA Events: 0.64 M
    11:35 Beam down: RF problem -> stopped the run.
    11:40 Brian Moffit called. The parity daq was stoped since 9:57. I don't know why, it did not reached the limit events.
    12:07 Beam back but meanwhile we decided to changed HRS momentum to 2.2515 (about 2%) in order to cut away q-elastic contribution (see specific entry).
    Quads were cycled.
    Septun I_readback=289.6
    12:36 ask for beam back
    12:38: Beam back
    Start parity daq.
    12:39 start run 3680. pol He3 elastic. 0 deg, Beam 1/2 plate OUT PS1=2 Ps2=3 I=5.5 uA Events: 3M
    12:07 start run 3681. 0 deg, Beam 1/2 plate OUT Events: 3M
    13:17 start run 3682. 0 deg, Beam 1/2 plate OUT Events: 3M
    13:29 start run 3683. 0 deg, Beam 1/2 plate OUT Events: 3M
    13:41 start run 3684. 0 deg, Beam 1/2 plate OUT Events: 3M Beam down for 4 min during the run (FSD trip)
    13:56 start run 3685. 0 deg, Beam 1/2 plate OUT Events: 3M
    14:08 start run 3686. 0 deg, Beam 1/2 plate OUT Events: 3M
    14:23 stop run. Requested beam 1/2 plate IN
    14:24 start run 3687. 0 deg, Beam 1/2 plate IN Events: 2.5M (beam down due to RF problem. Note that the start/end of run summary is wrong (beam 1/2 IS IN)
    14:38: Beam down: RF problem.
    14:42 start run 3688. 0 deg, Beam 1/2 plate IN Events: 0.5M. Beam on and off during this run. Then MCC called saying they need to retune the cavities-> We stoped the run (at 14:50).
    14:59 start run 3689. 0 deg, Beam 1/2 plate IN Events: 3M
    15:14 start run 3690. 0 deg, Beam 1/2 plate IN Events: 3M
    15:27 start run 3691. 0 deg, Beam 1/2 plate IN Events: 3M
    15:52 start run 3692. 0 deg, Beam 1/2 plate IN
    Lots of beam trips for this run and the previous one. I don't know about the reliability of these data.