Log entry time 08:26:36 on November18,2005

Entry number 160548

Owl Shift Summary



Taking production data. IHWP is OUT at beginning of shift.



SLUG 37 (OUT) total so far approx =



Owl Shift Log



2312:0008     happex run 6526

0011:0105     happex run 6527

0107:0154     happex run 6528 <-- no beam for last part of run

0158:0228     cosmics run 6529 <--- no beam

0229:0325     happex run 6530

0327:0423     happex run 6531

0425:0521     happex run 6532

0522:0617     happex run 6533

0618:0730     happex run 6534

0734:0752     happex run 6535 <--- beam modulation script not on?

0753:0758     cosmics run 6536 <--- no beam, small run 2K





People on Shift



Arie Beck

Bob Michaels

Al Tobias



Experimental Parameters



beam current = 58 microamps

target = LH2 in Loop 2 [T = 19.00K, P = 22.4psi, 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)

2312:0008     6526  production  OUT   29072 (0.110)

0011:0105     6527  production  OUT   39881 (0.152)

0107:0154     6528  production  OUT   15527 (0.059)

0229:0325     6530  production  OUT   32359 (0.123)

0327:0423     6531  production  OUT   35833 (0.136)

0425:0521     6532  production  OUT   33033 (0.125)

0522:0617     6533  production  OUT   40074 (0.153)

0618:0730     6534  production  OUT   32761 (0.125)   

0734:0752     6535  production  OUT    4179 (0.015) <--- beam modulation script not on?



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

2335:0056     12903   +(90.5 +/- 0.7)% end run due to question in strip chart

0104:0155     12904   +(86.6 +/- 1.5)% end run, due to beam downtime, ROC5 not responding, did coda beboot at 0230 when beam came back.

0243:0450     12905   +(90.2 +/- 0.6)% run ends, but ROC0 not responding, do coda reboot.

0529:0724     12906   +(91.1 +/- 0.8)% end run since ROC2 was not responding, then coda reboot.

0737:0753     12907   +(85.3 +/- 3.1)% ended run due to lack of beam.



Other Events



0130 MCC called to say they have magnet problems and estimate they will have beam back in 5 to 10 minutes.



0153 MCC called to say they could not cycle a bunch of magnets. There might be a communication problem, they tried to reboot an IOC which did not work. They called in additional help. No time estimate yet.



0225 MCC called to say they will be sending cw beam again.



0730 Noticed ROC25/ROC26 disconnected in main happex DAQ runcontrol, run#6534 end premature @ 82K events.



0752 MCC called to let us know that there are major instablilities in the beam. They mentioned that they had to close a vacuum valve in the A-line. They are looking into the problem. In the meantime, we ended happex production run #6535 and are taking cosmics data with run #6536. We also ended the compton run.



0758 MCC called to say they will give us beam back! Next production run is during day shift.