Difference between revisions of "CPP and NPP Run Conditions"

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(DAQ/Monitoring Test Preparations)
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| style="text-align:left" | Full target (Production)  ||  20 || 960 || 27 nA|| Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107  
 
| style="text-align:left" | Full target (Production)  ||  20 || 960 || 27 nA|| Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107  
| style="text-align:left" | Alternate 0/90 deg diamond configuration
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| style="text-align:left" | Alternate 0/90 deg diamond configuration (90%) with amorphous data (10%)
 
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| style="text-align:left" | TOF, CDC HV Scans  ||  0.2 || 10 || 27 nA || - || 3.4 mm || AMO (1x10-4)
 
| style="text-align:left" | TOF, CDC HV Scans  ||  0.2 || 10 || 27 nA || - || 3.4 mm || AMO (1x10-4)

Revision as of 14:25, 11 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)
Time estimates for Run Plan
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 (90%) with amorphous data (10%)
TOF, CDC HV Scans 0.2 10 27 nA - 3.4 mm AMO (1x10-4) Need time to assess data before updating settings. FCAL/BCAL trigger
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 27 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)
All Non-production total 5.6 269 - - - - -

Preparations and Schedule

  1. CPP DAQ/Monitoring Test Spring 2022
  2. CPP Run Coverage Summer 2022

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 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
  6. Complete a HV scan for the TOF and CDC. Adjust voltages accordingly, especially those of the TOF in advance of trigger studies.
  7. Take data for adjustment of the FCAL PMT gains.
  8. Optional: Check rates for two collimator configurations (5 and 3.4 mm ) ? Use profiler to stabilize the beam during test.
  9. Compare empty vs full target rates
  10. Adjustable Pb absorber (upstream of muon detector)
  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