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)
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 (E_beam = 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 (E_beam = 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 (E_beam = 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)