CPP and NPP Run Conditions

• CPP and NPP Run Conditions
• Electron beam energy expected = 11.55 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]
• Hall D solenoid will operate at its nominal field of 1350 A.
• 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. Complete a HV scan for the TOF and CDC. Adjust voltages accordingly, especially those of the TOF in advance of trigger studies.
6. Optional: Check rates for two collimator configurations (5 and 3.4 mm ) ? Use profiler to stabilize the beam during test.
7. Check radiation and backgrounds rates in Hall D with Pb target
   • Check rates and beam stability at 30 nA
8. Check currents and hit distributions in the MWPCs
9. Compare empty vs full target rates
10. Adjustable Pb absorber (upstream of muon detector)
    • Proposal (Ilya)
11. Commission trigger
    • Charged Trigger (TOF)
    • Neutral Trigger (FCAL/BCAL)
    • Calibration triggers (CTOF, random, PS)
    • Compare empty/full trigger rates
12. PS Magnet
    • Set nominal value for CPP = 2/3 * nominal GlueX. Take some data at the nominal GlueX setting for reference.
13. Beam energy calibration
    • May need to repeat periodically