HRS Detector Calibrations
From Hall A Wiki
|HRS||Ebeam [GeV]||P0 [GeV/c]||θe [deg]||Collimator||Target||Fast Raster
X x Y
|Right||2.217||0.85||48.75||None||Optics||3 mm x 3 mm||20 μA||S0&&S2m|
|Left||2.217||1.0||17.5||None||Optics||3 mm x 3 mm||20 μA||S0&&S2m|
- Check the timing and calibration constants (shower ADC gains, pedestals, timing offsets, pulse height corrections, attenuation lengths, efficiencies, position dependencies).
- 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.
- HRS Scintillators
* Look at all channels, compare against standard histograms.
* Are any channels firing at high rate (possible light leak)?
- 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.
- 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.