Difference between revisions of "CPP and NPP Run Conditions"
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(→Draft Commissioning Steps) |
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# Compare empty vs full target rates | # Compare empty vs full target rates | ||
# Adjustable Pb absorber (upstream of muon detector) | # Adjustable Pb absorber (upstream of muon detector) | ||
+ | #* [https://userweb.jlab.org/~ilarin/cpp/picture_frame.pdf Proposal] (Ilya) | ||
# Commission trigger | # Commission trigger | ||
#* Charged Trigger (TOF) | #* Charged Trigger (TOF) | ||
#* Neutral Trigger (FCAL/BCAL) | #* Neutral Trigger (FCAL/BCAL) | ||
#* Calibration triggers (CTOF, random, PS) | #* Calibration triggers (CTOF, random, PS) |
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)
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
- 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)