Log entry time 07:48:48 on November 8,2005

Entry number 159479

Owl Shift Summary



Taking production.  RC Tim informs us that we want a profile scan only once a day.  Therefore, we plan on not doing it on owl.

Weird coincidence rate, HALOG 159453, for Compton run 12752.  "coda reboot" to start the next run appears to have fixed the problem.

Bad dithering slope plots for run 6256, HALOG 159460, subsequent runs look okay.

Had only a couple of minor beam gones.

Slug 27 (OUT) is upto 485.379 kilopairs.

Don't forget to vote for the least of three evils today!



Owl Shift Log



0000:0049   Taking over happex run 6253 from swing shift

0049:0148   happex run 6254

0148:0245   happex run 6255

0245:0342   happex run 6256

0342:0440   happex run 6257

0440:0537   happex run 6258

0515:0528   beam gone, HALOG 159464 and ELOG 1297781

0537:0634   happex run 6259

0634:0732   happex run 6260

0639:0649   beam gone

0732:0800   happex run 6261 handed off to day shift



People on Shift



Luigi Lagamba

Jaideep Singh

Vitaliy Ziskin



Experimental Parameters



beam current = 57.9 +/- 0.2 microamps

target = LH2 in Loop 2 [T = 19.00 +/- 0.02 K, P = 23.6 +/- 0.2 psi, fan frequency = 90.92 +/- 0.02 Hz]

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

2357:0049     6253  production  OUT   39620

0052:0148     6254  production  OUT   42333

0149:0245     6255  production  OUT   32551

0247:0342     6256  production  OUT   45582, bad dithering slope plots HALOG 159460

0344:0440     6257  production  OUT   40834, a few helicity errors and FFB was off for 5 min during this run

0442:0537     6258  production  OUT   26166

0539:0634     6259  production  OUT   34737

0636:0732     6260  production  OUT   31630

0733:xxxx     6261  production  OUT   ?



total number of "ok" pairs     = 293.453 kilopairs

estimated "two-arm" production = 1.101 C

estimated shift productivity   = 73.4 percent



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

2321:0139     12752   +(85.4 +/- 0.7)%, weird coincidence rate, HALOG 159453

0148:0354     12753   +(84.6 +/- 0.6)%, run end failed, coda reboot

0358:0410     12754   +(85.8 +/- 1.8)%, ROC5 died, coda reboot

0427:0633     12755   +(85.5 +/- 0.6)%, run end failed, reset+download

0656:xxxx     12756   ?