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    User name X. Zheng

    Log entry time 16:06:31 on May 07, 2012

    Entry number 382966

    keyword=Day shift summary

    Shift started with:

    Left at 1.8857 GeV/c, events collected: 27M, scaled by Pt=82% gives 32.275M, goal is 224M;

    Right at 1.4684 GeV/c: events collected: 18M, scaled by Pb=82% gives 21.517M, total goal at this P0 is 165M, goal for Right arm is 2/3*165M = 110M;

    Once these settings are completed, we will need 2 runs on the Left HRS for the P0=1.7348 GeV/c and P0=1.5961 GeV/c (two runs per P0 setting). Then, for each P0 setting, Left arm should take 1/3 of nevents, Right arm 2/3 of nevents, until Left catches up with Right.. A To-Do table is shown below for reference.

    09:50-11:17 Beam off for RF-fixing;

    11:38-11:51 Left arm CODA problem, kcoda and restart. Run 5793 had no data.

    12:00-12:10 Beam current dropped to ~35nA for about 10 minutes due to a beam adjustment. This was during runs 5794 and 24498.

    12:56 Changed beam HWP (first) from OUT to IN; Last runs at HWP OUT were 5796 and 24500.

    13:50 We changed the Prescale on the Left from 4/5 to 3/5; on the Right from 2/2 to 1/2. First runs at these settings are 5799 and 24503.

    16:00 Runs 5805 and 24509 are on-going. Right arm needs about 20 more minutes of data; Left arm needs about 5-6 hours of more data.


    On-going for this shift:
    Left P0 Left Goal Run number Run nevents Run PtRun nevents (scaled by Pt2)Left accumulated nevents
    1.8857 224Mby 8am     32.275M
       5788 7M0.818.165M 40.440M
       5789 7M 0.797.767M 48.207M
       5790 7M 0.777.378M55.585M
       5791 1.3M 0.771.335M56.920M
       5792 7M 0.757M63.920M
       5794 6.1M 0.735.779M69.699M
       5795 7M 0.757M76.699M
       5796 0.5M 0.750.5M77.199M
       5797 7M 0.746.815M84.014M
       5798 7M 0.746.815M90.829M
       5799 7M 0.736.632M97.461M
       5800 7M 0.726.451M103.912M
       5801 7M 0.716.273M110.185M
       5802 7M 0.716.273M116.458M
       5803 7M 0.706.098M122.556M
       5804 7M 0.706.098M128.654M

    Right P0 Right Goal Run number Run nevents Run PtRun nevents (scaled by Pt2) Right accumulated nevents
    1.4684 165M*2/3=110Mby 8am     21.517M
       24493 4.9M0.815.715M 27.232M
       24494 4.9M 0.795.437M 32.669M
       24495 4.9M 0.775.165M 37.834M
       24496 0.9M 0.770.949M 38.783M
       24497 4.9M 0.754.9M 43.683M
       24498 7M 0.736.632M 50.315M
       24499 4.9M 0.754.9M 55.215M
       24500 0.35M 0.750.35M 55.565M
       24501 4.9M 0.744.770M 60.335M
       24502 4.9M 0.744.770M 65.105M
       24503 6M 0.735.684M 70.789M
       24504 6M 0.725.530M 76.329M
       24505 6M 0.715.377M 81.706M
       24506 6M 0.715.377M 87.083M
       24507 6M 0.705.227M 92.310M
       24508 6M 0.705.227M 97.537M


    To-Do:
    Left P0 Left Goal Run number Run neventsRun PtRun nevents (scaled by Pt2) Left accumulated nevents
    1.7348 2 runs      0
    1.5961 2 runs      0
    1.4684 165M*1/3=55M      0
    1.3509 80M*1/3=27M       0
    1.2428 77M*1/3=26M       0
    1.1434 74M*1/3=25M       0
    1.0519 72M*1/3=24M       0
    0.9678 70M*1/3=23M       0
    0.8904 67M*1/3=22M       0

    Right P0 Right Goal Run number Run neventsRun PtRun nevents (scaled by Pt2) Right accumulated nevents
    1.3509 80M*2/3=54M       0
    1.2428 77M*2/3=52M       0
    1.1434 74M*2/3=50M       0
    1.0519 72M*2/3=48M       0
    0.9678 70M*2/3=46M       0
    0.8904 67M*2/3=45M       0