GeV,
GeV/c,
;
It is expected to have high electron rates so is not good for pion contamination
analysis. But this is the only kinematics with negative polarity on the left
arm after the latest high voltage change for PRs. Other runs with H2 or D2 targets
are low in pion rates in principle, also show strong correlation in x vs. y so cannot
cover the full area of the detectors.