Production Run Plan R-HRS
From Hall A Wiki
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</)</td>
</tr> | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
15 cm Dummy#</td> | 2 x 2 mm2</td> | 4.481</td> | 1.547</td> | 52.91</td> | 5.5</td> | 0.26</td> | 4 (for 3.7k events)</td>
</tr> </table> % <b>Alternative kinematics for pointing run. # Take Al dummy data only if time permits.
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