Difference between revisions of "CPP and NPP Run Conditions"

Revision as of 08:55, 13 April 2022

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)

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

@@ Line 44: / Line 44: @@
 # Compare empty vs full target rates
 # Adjustable Pb absorber (upstream of muon detector)
+#* [https://userweb.jlab.org/~ilarin/cpp/picture_frame.pdf Proposal] (Ilya)
 # Commission trigger
 #* Charged Trigger (TOF)
 #* Neutral Trigger (FCAL/BCAL)
 #* Calibration triggers (CTOF, random, PS)