CPP and NPP Run Conditions

• CPP and NPP Run Conditions
• Electron beam energy expected = 11.7 GeV based on the planned Experimental Schedule
• Microscope will cover the range of [0.301-0.514] of the beam energy or [4.57-6.01 GeV]
• Pair Spectrometer magnet will be scaled down by 6/9 = 0.67 of its nominal field (569.4 A = 0.67x849.9 A)

Time estimates for Run Plan

Activity	Duration (PAC Days)	Current	Target	Collimator	Radiator	Comment
Full target (Production)	20	27 nA	Pb (0.3 mm)	3.4 mm	JD70-103 or JD70-107	Alternate 0/90 deg diamond configuration
Empty Target	1.5?	27 nA	-	3.4 mm	JD70-103 or JD70-107	Run at higher current?
Diamond Alignment	0.5?	20 nA?	Pb (0.3 mm)	3.4 mm	JD70-103 and JD70-107
Trigger Commissioning	1.3?	100 nA?	Pb (0.3 mm)	3.4 mm	JD70-103 or JD70-107
Lead Shield Alignment	0.1?	100 nA?	Pb (0.3 mm)	3.4 mm	JD70-103 or JD70-107
Beam Energy Calibration	0.1?	100 nA	Pb (0.3 mm)	3.4 mm	JD70-103 or JD70-107	Collimator Blocking for 5 min, periodically
TAC Runs	1.5?	<2 nA	-	3.4 mm	AMO (2x10-5)

Draft Commissioning Steps

1. Setup photon beam operation at 50 nA.
2. Check microscope and hodoscope operation in new configuration
3. Align diamond to 6 GeV coherent edge
4. Check rates in microscope in new position
5. Check rates for two collimator configurations (5 and 3.4 mm ) ?
   • Use profiler to stabilize the beam during test
6. Check radiation and backgrounds rates in Hall D with Pb target
7. Check currents and hit distributions in the MWPCs
8. Compare empty vs full target rates
9. Adjustable Pb absorber (upstream of muon detector)
10. Commission trigger
    • Charged Trigger (TOF)
    • Neutral Trigger (FCAL/BCAL)
    • Calibration triggers (CTOF, random, PS)