Detailed Run Plan (of Nov 29, 1999)

	activity	time	total time
§1)	General calibration (also useful for the sucessive physics runs)
1.a)	ARC/EP energy measurement	4 h
1.b)	BCM, current monitor calibration	2 h
1.c)	BPM HARP scan	1 h	7 h
§2)	Optics. Both spectrometers with negative polarity, both theta = 16.54o, p = 0.8429GeV/c, collimator 6msr and collimator out.
2.a)	Nilanga's optics study, 12C elastics. Detailed plan on extra sheet.	3 h
2.b)	4cm dummy target, Al elastics	1 h
2.c)	15cm dummy target, Al elastics	1 h
2.d)	10cm dummy target, Al elastics	1 h	6 h
§3)	Emiss resolution study
3.a)	Move to kinematics #17. Move HRSE to thetaE = 100.12o, pE = 0.407GeV/c, HRSH to thetaH = 23.59o, pH = 1.000GeV/c.	1 h
3.b)	12C target, both collimators out. I=50µA, prescale the T5 rate to less than 2kHz, no T1, T2, T3, T4.	0.2 h
3.c)	3He target, both collimators out. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each.	0.5 h
3.d)	3He target, both collimators 6msr. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each (factor should be 1/2 as before).	0.5 h	2.2 h
§4)	Target density studies (cryotarget commissioning)
4.a)	Move HRSE to thetaE = 30.94o, pE = 0.8108GeV/c. This is the Q2 = 5.01/fm2 for elastic scattering, the rates should not exceed about 30kHz in HRSE for any beam current. Target thickness 970mg/cm2. HRSE collimator 6msr, HRSH collimator out. If the T3 rate is >100Hz keep the HRSH setting, otherwise lower the momentum. From now on, HRSH will remain unchanged and serves as a luminosity monitor for the elastic runs. Scale T2, T3, T4 to 100Hz, take all T5 (maybe we learn something from them), and scale T1 to add up to about 2kHz. If the HRSH has any problem continue data taking, don't waste any time. It is not really needed for the density studies. Fix the HRSH on the fly, whenever you have time, and log it in the halog.	1 h
4.b)	I-scan, 3He(e,e) 9 settings at I = 1, 2, 5, 10, 20, 40, 60, 80 and 100µA	3 h
4.c)	55 other settings at different currents, raster sizes and fan frequencies. Detailed plan on separate sheet.	18 h	22 h
§5)	Elastic runs. If we are unsure about the pointing, we have to make a 12C run at each setting. It would add about 1/2h at each Q2. HRSE collimator is out all the time. Don't change anything at the HRSH, but make sure that it is running stable (magnets and detectors). It is the luminosity monitor. Data taking time can be adjusted, take about 20k in the elastic line. Analyze 10k events, get the fraction of good events, and estimate the total number of events needed. Stop the run if you have enough events, but no run shorter than 10min.
5.a.i)	Move HRSE to thetaE = 16.54o, pE = 0.8351GeV/c	0.5 h
5.a.ii)	3He(e,e) Q2 = 1.50/fm2, thetaE = 16.54o, pE = 0.8351GeV/c, I = 2µA	0.5 h
5.b.i)	Move HRSE to thetaE = 19.15o, pE = 0.8317GeV/c	0.5 h
5.b.ii)	3He(e,e) Q2 = 2.00/fm2, thetaE = 19.15o, pE = 0.8317GeV/c, I = 5µA	0.5 h
5.c.i)	Move HRSE to thetaE = 45.20o, pE = 0.7765GeV/c	0.5 h
5.c.ii)	3He(e,e) Q2 = 9.96/fm2, thetaE = 45.20o, pE = 0.7765GeV/c, I = 10µA	0.5 h
5.d.i)	Move HRSE to thetaE = 67.87o, pE = 0.7120GeV/c	0.5 h
5.d.ii)	3He(e,e) Q2 = 19.27/fm2, thetaE = 67.87o, pE = 0.7120GeV/c, I = 60µA	5 h
(Note: We should not do the Q2 = 26.91/fm2 elastic scattering point at this energy. It would require 34h at 100µA. This will have to wait until March.)
5.e.i)	Move HRSE to thetaE = 30.94o, pE = 0.8108GeV/c	0.5 h
5.e.ii)	3He(e,e) Q2 = 5.01/fm2, thetaE = 30.94o, pE = 0.8108GeV/c, I = 7µA	0.5 h	9.5 h
§6)	Beam displacement scan, 3He(e,e) Q2 = 5.01/fm2, thetaE = 30.94o, pE = 0.8108GeV/c, I = 1µA, turn raster off each time make a HARP scan.
	vertical +2.5mm , horizontal 0mm vertical -2.5mm , horizontal 0mm vertical 0mm , horizontal +2.5mm vertical 0mm , horizontal -2.5mm	2 h	2 h
§7)	1/2 density runs
7.a)	Change density of target to 1/2 density (500mg/cm2)	2 h
7.b)	3He(e,e) Q2 = 5.01/fm2, thetaE = 30.94o, pE = 0.8108GeV/c, HRSE collimator 6msr Repeat a few commissioning points at 1/4 density. If we are unsure about the pointing, we have to make a 12C run. It would add about 1/2h.	3 h
7.c)	Move to kinematics #17. Note this breaks the status of HRSH being a luminosity monitor. Move HRSE to thetaE = 100.12o, pE = 0.407GeV/c, HRSH to thetaH = 23.59o, pH = 1.000GeV/c. HRSH may be already there, see 4.a) and 3.a).	1 h
7.d)	3He target, both collimators 6msr. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each (factor should be 1/2 as before).	0.5 h
7.e)	3He target, both collimators out. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each.	0.5 h	7 h
§8)	1/4 density runs
8.a)	Change density of target to 1/4 density (250mg/cm2)	2 h
8.b)	3He target, both collimators out. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each.	0.5 h
8.c)	3He target, both collimators 6msr. I=5µA, raster size TBD. All T5, prescale T1, T2, T3, T4 to 100Hz each (factor should be 1/2 as before).	0.5 h
8.d)	Move HRSE to thetaE = 30.94o, pE = 0.8108GeV/c. If kinematic #17 is not the HRSH luminosity monitor kinematic, move it there. Move the HRSH collimator out.	1 h
8.e)	3He(e,e) Q2 = 5.01/fm2, thetaE = 30.94o, pE = 0.8108GeV/c, HRSE collimator 6msr. Repeat a few commissioning points at 1/4 density. If we are unsure about the pointing, we have to make a 12C run. It would add about 1/2h.	3 h	7 h
			62.7 h