Log entry time 08:00:58 on October22,2010

Entry number 336137

OWL SHIFT SUMMARY 10/22/2010



SHORT SUMMARY

Completed delta scan at beginning of shift. Performed dead time study at production kinematics, then continued with production data taking.



DETAILED SUMMARY

0:00 Completing delta scan study with run on 15cm LH2 target

     Settings: Calorimeter HV off

               LHRS at p=2.539 GeV/c, 21.5 deg

               1uA, no raster

               ps3=1

0:25 Change to DVCS production configuration

     Settings: Calorimeter HV on (for A. Camsonne test run)

               LHRS to p=2.591 GeV/c (cycled Q2, Q3)

               1uA, no raster

               ps5=1, others zero

0:40 Test run to check signals (A. Camsonne)

0:50 Start deadtime study

     Settings: Calorimeter HV off, rest the same as above

4:00 Continue with DVCS production data

     Settings: Calorimeter HV on, rest same as above

6:30 Beam gone for beam preparation tests

6:40 Resume dvcs production data taking



RUN SUMMARY

7718  LH2, p0=2.539 GeV/c, 1uA, raster off, delta scan, 200k

7719  LH2, p0=2.591 GeV/c, 1uA, raster off, junk

7720  LH2, p0=2.591 GeV/c, 1uA, raster off, test run, 43k

7721  LH2, p0=2.591 GeV/c, 1.0uA, raster off, dead time study, 86k

7722  LH2, p0=2.591 GeV/c, 1.6uA, raster off, dead time study, 106k

7723  LH2, p0=2.591 GeV/c, 2.1uA, raster off, dead time study, 140k

7724  LH2, p0=2.591 GeV/c, 2.6uA, raster off, dead time study, 154k

7725  LH2, p0=2.591 GeV/c, 3.5uA, raster off, dead time study, current changed to 3uA during run, 156k

7726  LH2, p0=2.591 GeV/c, 3.0uA, raster off, dead time study, 152k

7727  LH2, p0=2.591 GeV/c, 3.5uA, raster off, dead time study, 160k 

7728  LH2, p0=2.591 GeV/c, 4.2uA, raster off, dead time study, 163k

7729  LH2, p0=2.591 GeV/c, 5.0uA, raster off, dead time study, 193k

7730  LH2, p0=2.591 GeV/c, 0.5uA, raster off, dead time study, 60k

7731  LH2, p0=2.591 GeV/c, 1.0uA, raster off, DVCS production, 68k

7732  LH2, p0=2.591 GeV/c, 1.0uA, raster off, DVCS production, 231k

7733  LH2, p0=2.591 GeV/c, 1.0uA, raster off, DVCS production, 215k

7734  LH2, p0=2.591 GeV/c, 1.0uA, raster off, DVCS production, 108k

7735  LH2, p0=2.591 GeV/c, 1.0uA, raster off, DVCS production, 236k

7736  LH2, p0=2.591 GeV/c, 1uA, raster off, DVCS production,