Log entry time 08:12:23 on April 23, 2012

Entry number 377910

Workers

Yoomin Oh(SL), Paul Reimer(TO), Jie Liu(3rd)

Summary

00:00 Shift starts, P₀=0.8987

01:25 Target Polarization dropped to 0 and recovered to 25.5%.

02:05 P₀ set to 0.8448

03:00 HWP OUT.

04:15 TO suggest to re-polarize the target.
          Polarization now 30%.

05:20 Quick bleed-through rate check.

07:15 HWP IN.

07:30 Beam energy fluctuates with Hall C current.

08:00 P₀=0.8448 GeV finished. ~233 M events total.
          Go to 0.7941 GeV
          Over.

Production Run List

• P₀ = 0.8987 GeV, NH₃ Top, 185M subtotal events from previous.
  
  4878 / 23767 : 7M / 6.7M
  4879 / 23768 : 7M / 6.6M
  4880 / 23769 : 7M / 6.7M
  4881 / 23770 : 7M / 6.8M
  4882 / 23771 : 6.5M / 6.0M, Stopped due to target polarization drop
  4883 / 23772 : 4M(?)/ 7M, Left-TS5 no response, coda rebooted.
  4884 / 23773 : 7M / 3.9M, P₀=0.8987 GeV finished.
  

• P₀ = 0.8448 GeV, NH₃ Top
  

  4885 : 7M
  4886 : 7M
  4887 / 23774 : 6.3M / 5.4 M, ended due to HWP flip
  4888 / 23775 : 7M / 6.2M
  4889 / 23776 : 7M / 5.3M
  4890 / 23777 : 7M / 6.1M
  4891 / 23778 : 3.7M / 3.3M, stopped to re-polarize the target
  4892 / 23779 : 7M / 6.1M, 30% polarization
  4893 / 23780 : 7M / 6.1M
  4894 / 23781 : 7M / 6.4M
  4895 / 23782 : 7M / 6.5M, subtotal 124M
  4896 / 23783 : 7M / 6.2M
  4897 / 23784 : 7M / 6.2M
  4898 / 23785 : 7M / 6.3M
  4899 / 23786 : 7M / 6.3M
  4900 / 23787 : 7M / 6.1M
  4901 / 23788 : 2.1M / 1.8M, HWP flip
  4902 / 23789 : 7M / 6M, Tiefenbach fluctuating.
  4903 / 23790 : 7M / 6M 4904 / 23791 : 7M / 6.2M, The last production runs for this setting.