Log entry time 08:06:07 on November19,2005

Entry number 160645

Owl Shift Summary



Did a spectrometer q2 measurement in first hour of shift..

Taking production data rest of shift. IHWP is IN at beginning of shift.



SLUG 38 (IN) total so far (approx) =



Owl Shift Log



2311:0006     happex run 6554

xxxx:xxxx     spect. run 3099 q2 meas. <-- low current = 0.45uA w/ 1M events

0028:0040     spect. run 3100 q2 meas. <-- low current = 0.24uA w/ 1M events

0053:0148     happex run 6555

0149:0245     happex run 6556

0245:0341     happex run 6557

0341:0437     happex run 6558

0438:0533     happex run 6559

0534:0630     happex run 6560

0630:0726     happex run 6561

0727:xxxx     happex run 6562



People on Shift



Bob Michaels

Al Tobias



Experimental Parameters



beam current = 58 microamps (0.45uA or 0.24uA during spectrometer q2 measurement)

target = LH2 in Loop 2 [T = 19.0K, P = 22.2psi, fan frequency = 91Hz]

left  HRS (set) = 3.12340 GeV/c          right HRS (set) = 3.11260 GeV/c

left  septum (set) = 323.61 A            right septum (set) = 316.92 A

sweeper magnet (set) = 111.0 A



Runs Summary



happex time   run#  type        BHWP  equivalent "ok" two-arm pairs (Coulombs)

2311:0006     6554  production  IN   39672 (0.151)

0053:0148     6555  production  IN   26412 (0.101)

0149:0245     6556  production  IN   36601 (0.140)

0245:0341     6557  production  IN   38369 (0.146)

0341:0437     6558  production  IN   35461 (0.135)

0438:0533     6559  production  IN   39091 (0.149)

0534:0630     6560  production  IN   38075 (0.145)

0630:0726     6561  production  IN   34355 (0.131) 

0727:xxxx     6562  production  IN   running ...



compton time  run#    (beam polarization)*(photon polarization) [stat err only] or comments

2309:0028     12920   -(89.1 +/- 0.9)% end run due to high rates in photon detector > 13KHz during Q2 measurement

0053:0301     12921   -(89.2 +/- 0.6)% run went fine to 1M events

0309:0517     12922   -(89.0 +/- 0.6)% HV tripped off to detectors, end run & reboot

0537:0606     12923   ??

0607:0607     12924   junk, short run

0611:0644     12925   -(90.8 +/- 2.3)%

0650:0727     12926   -(90.6 +/- 1.2)%

0744:xxxx     12927   running ...



Other Events



The Beamline HV (compton) tripped a couple of times, and toward the latter part of the OWL shift, the compton DAQ had a few problems.