HRS Detector Calibrations

• Use LH2 "white" spectra to get maximum coverage of planes, take 250K events.

Ebeam [GeV]	P0 [GeV/c]	θe [deg]	Collimator	Target	Fast Raster X x Y	Beam Current	Trigger
11.02	1.0	48.8	None	15 cm LH2	2 mm x 2 mm	20μA	S0&&S2m

1. Check the timing and calibration constants (shower ADC gains, pedestals, timing offsets, pulse height corrections, attenuation lengths, efficiencies, position dependencies).
2. VDCs and Straw Chambers
   * Look at drift time spectra, is the shape reasonable? in the right time range?
   * Fit for new time-to-distance map
   * Look at focal plane distributions.
   * Check fiducial tracking efficiency, is it > 95%, If not, then check TDC windows and tracking parameters.
   
3. HRS Scintillators
   * Look at all channels, compare against standard histograms.
   * Are any channels firing at high rate (possible light leak)?
   
4. Gas Cherenkov (Barak Schmookler)
   * Look at histograms (Npe vs. x, and Npe vs. Shower), compare with standard distributions, ideally there shoudl be no x dependence.
   
5. Electromagnetic calorimeters
   * Make sure all ADC channels have signals.
   * Calibrate with electrons. Maybe not be possible at this energy due to low rates.
   

• After these steps, the detectors should be fairly well calibrated.