Log entry time 08:11:34 on October19,2005

Entry number 157393

  ♠ Øwl $hift §ummary ♠

  

  0000:0013   HAPPEX run 5730

  0013:0136   Rob's alignment check with SPEC DAQ runs 2872-2875, see HALOGS 157359,  157368 and 157376

  0136:0208   HAPPEX run 5731

  0208:0355   beam problems, see halogs 157360, 157364, 157370

  0355:0408   checking spot with EMPTY TARGET (spec daq run 2876), looks good, moving to LH2

  0359        diagnosed and solved compton analysis problem, see halog 157382

  0408:0505   HAPPEX run 5734

  0505:0602   HAPPEX run 5735

  0602:0659   HAPPEX run 5736

  0659:0707   attempt at profile scan was a glorious failure, see halog 157387

  0707:0800   HAPPEX run 5737

  0730        on close inspection, compton analysis is still a problem, see halog 157388

  0744:0747   minor beam problem, halog 157390

  

  ‡ Shifty Owlers ‡

  

  Etienne Burtin

  Rob Feuerbach (0000:0345)

  Vladimir Nelyubin

  Jaideep Singh

  

  €xperimental Parameters

  

  beam current = 58 µA

  target = LH2 in Loop 2 [T=19.00 ± 0.02 K, P=23.8 ± 0.2 psi, ν = 90.9  0 ± 0.02 Hz]

  left  HRS (set) = 3.12340 GeV/c

  left  septum (set) = 323.62 A

  right HRS (set) = 3.11260 GeV/c

  right septum (set) = 316.92 A

  sweeper magnet (set) = 111 A

  

  ℜuns Summary

  

  happex time   run#  type        BHWP  good pairs

  0001:0013     5730  production  IN     9.0k

  0136:0208     5731  production  IN    18.1k

  0211:0307     5732  pedestal

  0308:0404     5733  pedestal

  0408:0505     5734  production  IN    43.8k

  0506:0602     5735  production  IN    36.4k

  0603:0659     5736  production  IN    38.8k

  0707:0801     5737  production  IN    35.8k

  

  $hift productivity ≅ 0.496

  estimated "two-arm" production ≅ 0.685 C

  

  spec time     run#  type

  0012:0016     2872  spot check

  0039:0051     2873  alignment check data (100k events)

  xxxx:0110     2874  detector check

  0111:0112     2875  detector check

  0356:0357     2876  spot check

  

 compton time        run#    Pe·Pγ or comments

  2246:2354           12414   "empty run"

  0010:0045           12415   no analysis output

  0243:0339           12416   no analysis output

  0342:0358           12417   "stopped by accident"

  0359:xxxx           12418   ????????

  0403:0440           12419   -89.2%

  0440:0538           12420   no analysis output

  0542:0626           12421   -87.0%

  (the compton computer time seems to be off by an 1 hour and then some)