Difference between revisions of "HRS Detector Calibrations"
From Hall A Wiki
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<table border="1" style="width:80%"> | <table border="1" style="width:80%"> | ||
<tr> | <tr> | ||
| + | <td>HRS</td> | ||
<td>E<SUB>beam</SUB> [GeV]</td> | <td>E<SUB>beam</SUB> [GeV]</td> | ||
<td>P<sub>0</sub> [GeV/c]</td> | <td>P<sub>0</sub> [GeV/c]</td> | ||
| Line 11: | Line 12: | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td> | + | <td>Right</td> |
| − | <td>0. | + | <td>2.217</td> |
| − | <td>48. | + | <td>0.85</td> |
| + | <td>48.75</td> | ||
<td>None</td> | <td>None</td> | ||
<td>Optics</td> | <td>Optics</td> | ||
| − | <td> | + | <td>3 mm x 3 mm</td> |
| − | <td> | + | <td>20 μA</td> |
<td>S0&&S2m</td> | <td>S0&&S2m</td> | ||
</tr> | </tr> | ||
| − | * Use Optics "white" spectra to get maximum coverage of planes, take 250K events. | + | <tr> |
| + | <td>Left</td> | ||
| + | <td>2.217</td> | ||
| + | <td>1.0</td> | ||
| + | <td>17.5</td> | ||
| + | <td>None</td> | ||
| + | <td>Optics</td> | ||
| + | <td>3 mm x 3 mm</td> | ||
| + | <td>20 μA</td> | ||
| + | <td>S0&&S2m</td> | ||
| + | </tr> | ||
| + | * Use Optics "white" spectra to get maximum coverage of planes, take at least 250K events. | ||
</table> | </table> | ||
<ol> | <ol> | ||
Latest revision as of 14:27, 9 October 2016
| HRS | Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Collimator | Target | Fast Raster X x Y |
Beam Current | Trigger |
| 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.
