Monday, Apr. 4: SWING Shift
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Specific mission
- DVCS calorimeter calibration runs at 2 pass
DVCS:
LH2 target, unrastered beam (which means beam current 5 uA - not more than 5 !!!).
LHRS in positive polarity.
Open LHRS collimator
DAQ: DVCS config
angle LHRS= 38.04 deg
momentum LHRS= 2.127 GeV
beam energy= 4.5 GeV
We will take about 1 hour beam with three calorimeter angles: 26.5, 25 and 23.5 deg.
General Info
Harp scan
When in need of asking MCC for a harp scan don't forget to mention that the raster should be OFF.
Beam centering
Before starting checking the beam (the profile with harp scans, its centering with the raster target or the C hole target, etc.) don't forget to turn OFF the DVCS calo HV, and also the HV on the VDCs. When ready for production don't forget to turn them back on.
BPM/Spot++ Check
- After a period of 3 hours or more without beam (like beam study, pass change,...) ask MCC to run 5uA 2 by 2 rastered beam on the carbon hole target and make sure you can see the hole (use Spot++ to analyze the C hole run)
