Difference between revisions of "HRS Detector Calibrations"
From Hall A Wiki
| Line 11: | Line 11: | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td> | + | <td>11.02</td> |
| − | <td> | + | <td>1.0</td> |
| − | <td> | + | <td>48.8</td> |
<td>None</td> | <td>None</td> | ||
| − | <td> | + | <td>15 cm LH2</td> |
| − | <td> | + | <td>2 mm x 2 mm</td> |
<td>20μA</td> | <td>20μA</td> | ||
<td>S0&&S2m</td> | <td>S0&&S2m</td> | ||
</tr> | </tr> | ||
| − | * Use | + | * Use LH2 "white" spectra to get maximum coverage of planes, take 250K events. |
</table> | </table> | ||
<ol> | <ol> | ||
<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 | + | <li> VDCs and Straw Chambers <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> | * 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> | ||
| − | <li> HRS Scintillators | + | <li> HRS Scintillators <br> |
* 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> Gas Cherenkov (Barak Schmookler) <br> | <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> | * Look at histograms (Npe vs. x, and Npe vs. Shower), compare with standard distributions, ideally there shoudl be no x dependence.<br> | ||
| − | <li> Electromagnetic calorimeters | + | <li> Electromagnetic calorimeters <br> |
* Make sure all ADC channels have signals.<br> | * Make sure all ADC channels have signals.<br> | ||
* Calibrate with electrons.<br> | * Calibrate with electrons.<br> | ||
</ol> | </ol> | ||
* After these steps, the detectors should be fairly well calibrated. | * After these steps, the detectors should be fairly well calibrated. | ||
Revision as of 15:15, 31 January 2016
| 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 |
- 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.
- After these steps, the detectors should be fairly well calibrated.
