Difference between revisions of "CPP and NPP Run Conditions"
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− | | style="text-align:left" | Lead Shield Alignment || 0.2 || 10 || 100 nA | + | | style="text-align:left" | Lead Shield Alignment || 0.2 || 10 || 30-100 nA || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 |
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Revision as of 11:47, 10 May 2022
- 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.
- Use the 750 um PS converter to collect sufficient PS triggers at low rate.
- 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) | Duration (hours) | Current | Target | Collimator | Radiator | Comment |
---|---|---|---|---|---|---|---|
Full target (Production) | 20 | 960 | 27 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Alternate 0/90 deg diamond configuration |
TOF, CDC, FCAL HV Scans | 0.2 | 10 | 27 nA | - | 3.4 mm | JD70-103 or JD70-107 | Need time to assess data before updating settings |
Empty Target | 1.5? | 72 | 27 nA | - | 3.4 mm | JD70-103 or JD70-107 | Run at higher current? |
Diamond Alignment | 0.5? | 24 | 20 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 and JD70-107 | |
Trigger Commissioning | 1? | 48 | 100 nA? | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | |
Lead Shield Alignment | 0.2 | 10 | 30-100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | |
Beam Energy Calibration | 0.1? | 5 | 100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Collimator Blocking for 5 min, periodically |
Straight Track (Solenoid off) | 0.5? | 24 | 100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Ramping magnet takes about a shift. |
PS magnet at GlueX nominal current | 0.1? | 5 | 100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | |
TAC Runs | 1.5? | 72 | <2 nA | - | 3.4 mm | AMO (2x10-5) |
DAQ/Monitoring Test Preparations
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 radiation and backgrounds rates in Hall D with Pb target
- Check rates and beam stability at 30 nA
- Check currents and hit distributions in the MWPCs
- Complete a HV scan for the TOF and CDC. Adjust voltages accordingly, especially those of the TOF in advance of trigger studies.
- Take data for adjustment of the FCAL PMT gains.
- Optional: Check rates for two collimator configurations (5 and 3.4 mm ) ? Use profiler to stabilize the beam during test.
- 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)
- Compare empty/full trigger rates
- PS Magnet
- Set nominal value for CPP = 2/3 * nominal GlueX. Take some data at the nominal GlueX setting for reference.
- Beam energy calibration
- May need to repeat periodically