Difference between revisions of "Production Run Plan R-HRS"
From Hall A Wiki
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| − | <td>0.5 (for 7.5k events <b>at 10 μA</b> | + | <td>0.5 (for 7.5k events)<br> <b>at 10 μA</b></td> |
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Revision as of 19:44, 21 February 2016
Proton Elastic Kinematics
* If you need to increase the spectrometer momentum setting, make sure you cycle Q2 and Q3 as per the cycling procedure. * Elastic electron rates assume 20 μA on 15 cm LH2 target, 5 mSr acceptance. * Use the following prescale factors: ps1=1, ps2=1, ps3=1, ps8=100. All other triggers should have zero prescale factor. * A GMp expert will check the data quality.
- 2nd Pass (Ebeam = 4.5 GeV) Time estimate: 12 hours @ 20 μA
| Target | Raster | Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | Electron Rate [Hz] at 20 μA | hours at 20 μA |
| 15 cm LH2 | 2 x 2 mm2 | 4.481 | 1.547 | 52.91 | 5.5 | 1.4 | 7 (for 35k events) |
| Optics | Off | 4.481 | 1.547 | 52.91 | 5.5 | 0.23 | 0.5 (for 400 events) |
| Optics% | Off | 4.481 | 0.85 | 52.91 | 3.0 | 4.2 at 10 μA | 0.5 (for 7.5k events) at 10 μA |
| 15 cm Dummy# | 2 x 2 mm2 | 4.481 | 1.547 | 52.91 | 5.5 | 0.26 | 4 (for 3.7k events) |
% Alternative kinematics for pointing run. # Take Al dummy data only if time permits.
- 4th Pass (Ebeam = 8.8 GeV) Time estimate: 22 days @ 20 μA
| Target | Raster | Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | Electron Rate [Hz] at 20 μA | days at 20 μA |
| 15 cm LH2 | 2 x 2 mm2 | 8.841 | 2.101 | 48.74 | 12.65 | 0.018 | 21 (for 32k events) |
| 15 cm Dummy | 2 x 2 mm2 | 8.841 | 2.101 | 48.74 | 12.65 | ---- |
- 5th Pass (Ebeam = 11.0 GeV) Time estimate: 39 days @ 20 μA
| Target | Raster | Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | Electron Rate [Hz] at 20 μA | days at 20 μA |
| 15 cm LH2 | 2 x 2 mm2 | 11.021 | 2.204 | 48.74 | 16.54 | 0.003 | 38 (for 10k events) |
| 15 cm Dummy | 2 x 2 mm2 | 11.021 | 2.204 | 48.74 | 16.54 | ---- |
- 2nd Pass (Ebeam = 4.5 GeV) Time estimate: 7 hours @ 20 μA
| Target | Raster | Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | Electron Rate [Hz] at 20 μA | hours at 20 μA |
| 15 cm LH2 | 2 x 2 mm2 | 4.481 | 1.706 | 48.75 | 5.21 | 2.4 | 4 (for 35k events) |
| 15 cm Dummy | 2 x 2 mm2 | 4.481 | 1.706 | 48.75 | 5.21 | 0.4 | 2.5 (for 3.6k events) |
