Difference between revisions of "HRS Detector Calibrations"
From Hall A Wiki
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<li> Check the timing and calibration constants (shower ADC gains, pedestals, timing offsets, pulse height corrections, attenuation lengths, efficiencies, position dependencies). | <li> Check the timing and calibration constants (shower ADC gains, pedestals, timing offsets, pulse height corrections, attenuation lengths, efficiencies, position dependencies). | ||
<li> VDCs and Straw Chambers (Yang Wang)<br> | <li> VDCs and Straw Chambers (Yang Wang)<br> | ||
| − | |||
* Look at drift time spectra, is the shape reasonable? in the right time range?<br> | * Look at drift time spectra, is the shape reasonable? in the right time range?<br> | ||
| + | * Fit for new time-to-distance map<br> | ||
* Look at focal plane distributions.<br> | * Look at focal plane distributions.<br> | ||
* Check fiducial tracking efficiency, is it > 95%, If not, then check TDC windows and tracking parameters.<br> | * Check fiducial tracking efficiency, is it > 95%, If not, then check TDC windows and tracking parameters.<br> | ||
| Line 32: | Line 32: | ||
* Look at all channels, compare against standard histograms.<br> | * Look at all channels, compare against standard histograms.<br> | ||
* Are any channels firing at high rate (possible light leak)?<br> | * Are any channels firing at high rate (possible light leak)?<br> | ||
| − | <li> | + | <li> Gas Cherenkov (Barak Schmookler) <br> |
| − | < | + | * Look at histograms (Npe vs. x, and Npe vs. Shower), compare with standard distributions, ideally there shoudl be no x dependence.<br> |
| − | <li> | + | <li> Electromagnetic calorimeters (Longwu Ou) |
| − | < | + | * Make sure all ADC channels have signals.<br> |
| + | * Calibrate with electrons.<br> | ||
</ol> | </ol> | ||
| + | ** After these steps, the detectors should be fairly well calibrated. | ||
Revision as of 13:46, 14 October 2014
| Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Collimator | Target | Fast Raster X x Y |
Beam Current | Trigger |
| 7.3 | 3.056 | 19.0 | None | Optics Carbon | 1 mm x 1 mm | 20μA | 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 (Yang Wang)
* 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 (Barak Schmookler)
* 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 (Longwu Ou)
* Make sure all ADC channels have signals.
* Calibrate with electrons.
- After these steps, the detectors should be fairly well calibrated.
