Difference between revisions of "Fall 2016 calorimeter calibration (elastic)"

Revision as of 11:47, 20 September 2016

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This is in progress (09-20-16 contact J. Roche)

Need to remove the plastic shield.
Calorimeter-Target distance =6.0m
LH2 target, unrastered beam (which means beam current at less than 5 uA).
LHRS in positive polarity.
Open LHRS collimator
DAQ: DVCS config, trigger is S0+S2, autovalidation.
angle_LHRS= 32.50 [deg]
momentum _LHRS= 3.0 GeV
beam energy= 6.4 GeV

We will take about 2 hours beam with three calorimeter angles: 21.4, 22.7 and 24.0 deg.

The plot below shows calculation for the case where we would move the calorimeter and the LHRS for each kinematic point.