Production Run Plan R-HRS

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 (E_beam = 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. 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)