• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name jpchen

    Log entry time 16:12:53 on April24,2012

    Entry number 378500

    keyword=Day shift summary

    Day shift summary

    Shift workers: J. P. Chen (SL), H. Baghdasaryen(TO), E. Jensen (3rd)

    8:00 continue production at P0=0.6596 GeV/c
    10:05 Completed data taking at this momentum.
    Beam off for MCC to work on beam.
    Controlled acccess for parasitic tests work (Klaus, Alexandre and Huan).
    Moved right HRS to P0=0.6200 GeV/c.
    Target annealed.
    12:15 controll access ended
    12:45 beam abck started dilution runs, L@0.6596GeV, R@0.6200 GeV/c.
    Also centering beam in Y.
    Empty/home at original beam position BPMB (0.4 mm, -5.3), BPMA (-1.2, -5.9)
    12C, first run at original position, moved beam up by 0.5 mm, did 2nd run. Then moved up beam another 0.5 mm, did 3rd run. Almost good.
    Dummry/cross, moved up another 0.25 mm, did two runs. Spot good.
    New position in Y BPMA=-4.6mm, BPMB=-4.0mm.
    Moved to Bottom cell and polarzing.
    14:00 Did breed-through, only 0.37%
    Moved Left HRS to P0=0.6200 GeV/c.
    bottom cell polarized to 39.1%, started production, dropped to 36.2%.

    15:33 Changed HWP1 from OUT to IN.
    Run 23859/4983/41640 has this change near the end of run.
    16:00 still production for P0=0.6200 GeV/c.
    Accumulated events=
    Total events needed is 102*(84/89 *31/32)**2= 85M.



    Run list:

    Production at P0=0.6596 GeV/c
    L/R/3rd # events(M) L/R
    4968/23844/41626 7/6.6 HWP1=OUT
    4969/23845/41627 7/7
    4970/23846/41628 7/7
    4971/23847/41629 7/7
    4972/23848/41630 7/7
    4973/23849/41630 7/7
    Total events 137M (needed 144M)

    Dilution runs Left@0.6596 GeV, Right @0.6200 GeV:
    4974/23850/41631 1/8M/1.4M Empty/home, original position,
    BPMB (0.4, -5.3), BPMA (-1.2, -5.9)
    4975/23851/41632 .8M/.8M 12C, original position
    4976/23852/41633 0.4M/0.4M, 12C, moved beam up by 0.5mm
    4977/23853/41634 12C, moved up another 0.5 mm
    4978/23854/41635 0.4M/0.4M, Dummy, moved up 0.25 mm, BPMB=-4.0, BPMA=-4.6. New BPM position.
    4979/23855/41636 0.5M/0.5M, Dummy

    Production at P0=0.6200 GeV/c, bottom cell
    4980/23856/41637 7/6.3 HWP1=OUT
    4981/23857/41638 7/7
    4982/23858/41639 7/7
    4983/23859/41640 7/7 near the end HWP1 changed to IN
    4984/23860/41641 7/7 HWP1=IN

    Total events taken 69.3M (needed is 85M).