Difference between revisions of "CPP and NPP Run Conditions"
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* [[Media:CPP NPP RunConditions.png | CPP and NPP Run Conditions]] | * [[Media:CPP NPP RunConditions.png | CPP and NPP Run Conditions]] | ||
− | * Electron beam energy expected = 11. | + | * Electron beam energy expected = 11.57 GeV based on the planned [https://www.jlab.org/sites/default/files/user-liaison/documents/Web20211122.1.pdf Experimental Schedule] |
− | * Microscope will cover the range of [0. | + | * Microscope will cover the range of [0.391-0.514] of the beam energy or [4.52-5.95 GeV] |
* Hall D solenoid will operate at its nominal field of 1350 A. | * 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. | * Use the 750 um PS converter to collect sufficient PS triggers at low rate. | ||
Line 12: | Line 12: | ||
|- | |- | ||
| 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 | + | | style="text-align:left" | Alternate 45, 45, 135, 135 deg diamond configuration (240 M events each) with amorphous data (60 M events) |
|- | |- | ||
− | | style="text-align:left" | TOF, CDC HV Scans || 0.2 || 10 || 27 nA || - || 3.4 mm || AMO (1x10-4) || | + | | style="text-align:left" | TOF, CTOF, CDC HV Scans || 0.2 || 10 || 27 nA || - || 3.4 mm || AMO (1x10-4) || Beni, Naomi, Mark |
|style="text-align:left" | Need time to assess data before updating settings. FCAL/BCAL trigger | |style="text-align:left" | Need time to assess data before updating settings. FCAL/BCAL trigger | ||
|- | |- | ||
− | | style="text-align:left" | Empty Target || 1.5? || 72 || | + | | style="text-align:left" | Empty Target || 1.5? || 72 || 50 nA || - || 3.4 mm || JD70-103 or JD70-107 || Rory, Ilya, Andrew |
− | |style="text-align:left" | | + | |style="text-align:left" | Take data at full-target current for normalization |
|- | |- | ||
− | | style="text-align:left" | Diamond Alignment || 0.5? || 24 || 20 nA || Pb (0.3 mm) || 3.4 mm || JD70-103 and JD70-107 || | + | | style="text-align:left" | Diamond Alignment || 0.5? || 24 || 20 nA || Pb (0.3 mm) || 3.4 mm || JD70-103 and JD70-107 || Hovanes |
|style="text-align:left" | | |style="text-align:left" | | ||
|- | |- | ||
− | | style="text-align:left" | Trigger Commissioning || 1? || 48 || 100 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || | + | | style="text-align:left" | Trigger Commissioning || 1? || 48 || 100 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || Sasha |
| style="text-align:left" | | | style="text-align:left" | | ||
|- | |- | ||
− | | 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 || | + | | 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 || Ilya |
| style="text-align:left" | | | style="text-align:left" | | ||
|- | |- | ||
− | | style="text-align:left" | Beam Energy Calibration || 0.1? || 5 || 100 nA || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || | + | | style="text-align:left" | Beam Energy Calibration || 0.1? || 5 || 100 nA || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || Alexandre |
| style="text-align:left" | Collimator Blocking for 5 min, periodically | | style="text-align:left" | Collimator Blocking for 5 min, periodically | ||
|- | |- | ||
− | | style="text-align:left" | Straight Track (Solenoid off) || 0.5? || 24 || 100 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || | + | | style="text-align:left" | Straight Track (Solenoid off) || 0.5? || 24 || 100 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || Simon, Lubomir |
| style="text-align:left" | Ramping magnet takes about a shift. | | style="text-align:left" | Ramping magnet takes about a shift. | ||
|- | |- | ||
− | | style="text-align:left" | PS magnet at GlueX nominal current || 0.1? || 5 || 27 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || | + | | style="text-align:left" | PS magnet at GlueX nominal current || 0.1? || 5 || 27 nA? || Pb (0.3 mm) || 3.4 mm || JD70-103 or JD70-107 || Sasha? |
| style="text-align:left" | | | style="text-align:left" | | ||
|- | |- | ||
− | | style="text-align:left" | TAC Runs || 1.5? || 72 || <2 nA || - || 3.4 mm || AMO (2x10-5) || | + | | style="text-align:left" | TAC Runs || 1.5? || 72 || <2 nA || - || 3.4 mm || AMO (2x10-5) || Sasha |
|style="text-align:left" | | |style="text-align:left" | | ||
|- | |- | ||
Line 52: | Line 52: | ||
== Draft Commissioning Steps == | == Draft Commissioning Steps == | ||
+ | # Set Solenoid (standard GlueX) and PS magnet to CPP values (CPP = 2/3 * nominal GlueX). | ||
# Setup photon beam operation at 50 nA. | # Setup photon beam operation at 50 nA. | ||
# Check microscope and hodoscope operation in new configuration | # Check microscope and hodoscope operation in new configuration | ||
# Align diamond to 6 GeV coherent edge | # Align diamond to 6 GeV coherent edge | ||
# Check rates in microscope in new position | # Check rates in microscope in new position | ||
− | # Check radiation and backgrounds rates in Hall D with Pb target | + | # Harp scans and check photon beam on collimator |
+ | # Check radiation and backgrounds rates in Hall D with Pb target | ||
#* Check rates and beam stability at 30 nA | #* Check rates and beam stability at 30 nA | ||
#* Check currents and hit distributions in the MWPCs | #* 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. | + | # Preliminary trigger setup to be used during initial checks |
+ | # Complete a HV scan for the TOF, CTOF and CDC. Adjust voltages accordingly, especially those of the TOF in advance of trigger studies. | ||
# Take data for adjustment of the FCAL PMT gains. | # Take data for adjustment of the FCAL PMT gains. | ||
− | # | + | # Take data for Sean's Detector Checkout |
− | # Compare empty vs full target rates | + | # Compare empty vs full target rates |
+ | #* [[Media:full_empty_running.pdf]] Determination of optimal running point | ||
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=5651 GlueX-doc-5651] Initial Analysis | ||
+ | #* [https://logbooks.jlab.org/entry/4005395 Log Entry 4005395] Toy MC to study empty statistics | ||
# 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) | #* [https://userweb.jlab.org/~ilarin/cpp/picture_frame.pdf Proposal] (Ilya) | ||
Line 70: | Line 76: | ||
#* Calibration triggers (CTOF, random, PS) | #* Calibration triggers (CTOF, random, PS) | ||
#* Compare empty/full trigger rates | #* Compare empty/full trigger rates | ||
− | # | + | # Production |
− | #* | + | #* Full target |
− | # | + | #* Empty target, fraction determined during commissioning. |
− | # | + | # Special Runs during Production |
+ | #* Beam energy calibration (Short, possible daily runs) | ||
+ | #* Regular short runs in raw mode | ||
+ | #* Take a TAC run close to start and one at end of run. | ||
+ | #* PS: Take data at the nominal GlueX setting for reference. | ||
+ | #* Straight track data (solenoid off) | ||
+ | |||
+ | == Non-production activities remaining (Jul 27) == | ||
+ | |||
+ | # Second TAC run (> 7 days from end of run) | ||
+ | # Take a current rate scan on full target later in the run to investigate any rate dependent effects. Do we want to do this? When? | ||
+ | # PS magnet at nominal current? | ||
+ | |||
+ | == Decommissioning / Deinstallation == | ||
+ | |||
+ | # The Pb target will be secured upon completion of the experiment. It will be stored either in a safe in the hall if it is activated, or the safe in Hall D conference room if not. | ||
+ | # The Pb frame shield will be surveyed while the first stage is still up on the platform | ||
+ | # After uncabling of the MWPCs, the chamber cables will be stored along with the chambers in the EEL. | ||
+ | # The steel absorbers will be stored inside to prevent corrosion, likely in the Test Lab. | ||
+ | # The CTOF scintillators will be stored in the EEL along with the MWPCs. That gets them out of the hall radiation environment and makes them accessible even if Hall D is closed. |
Latest revision as of 09:07, 28 July 2022
- CPP and NPP Run Conditions
- Electron beam energy expected = 11.57 GeV based on the planned Experimental Schedule
- Microscope will cover the range of [0.391-0.514] of the beam energy or [4.52-5.95 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 | Contact | Comment |
---|---|---|---|---|---|---|---|---|
Full target (Production) | 20 | 960 | 27 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Alternate 45, 45, 135, 135 deg diamond configuration (240 M events each) with amorphous data (60 M events) | |
TOF, CTOF, CDC HV Scans | 0.2 | 10 | 27 nA | - | 3.4 mm | AMO (1x10-4) | Beni, Naomi, Mark | Need time to assess data before updating settings. FCAL/BCAL trigger |
Empty Target | 1.5? | 72 | 50 nA | - | 3.4 mm | JD70-103 or JD70-107 | Rory, Ilya, Andrew | Take data at full-target current for normalization |
Diamond Alignment | 0.5? | 24 | 20 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 and JD70-107 | Hovanes | |
Trigger Commissioning | 1? | 48 | 100 nA? | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Sasha | |
Lead Shield Alignment | 0.2 | 10 | 30-100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Ilya | |
Beam Energy Calibration | 0.1? | 5 | 100 nA | Pb (0.3 mm) | 3.4 mm | JD70-103 or JD70-107 | Alexandre | 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 | Simon, Lubomir | 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 | Sasha? | |
TAC Runs | 1.5? | 72 | <2 nA | - | 3.4 mm | AMO (2x10-5) | Sasha | |
All Non-production total | 5.6 | 269 | - | - | - | - | - |
Contents
Preparations and Schedule
Draft Commissioning Steps
- Set Solenoid (standard GlueX) and PS magnet to CPP values (CPP = 2/3 * nominal GlueX).
- 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
- Harp scans and check photon beam on collimator
- 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
- Preliminary trigger setup to be used during initial checks
- Complete a HV scan for the TOF, CTOF and CDC. Adjust voltages accordingly, especially those of the TOF in advance of trigger studies.
- Take data for adjustment of the FCAL PMT gains.
- Take data for Sean's Detector Checkout
- Compare empty vs full target rates
- Media:full_empty_running.pdf Determination of optimal running point
- GlueX-doc-5651 Initial Analysis
- Log Entry 4005395 Toy MC to study empty statistics
- 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
- Production
- Full target
- Empty target, fraction determined during commissioning.
- Special Runs during Production
- Beam energy calibration (Short, possible daily runs)
- Regular short runs in raw mode
- Take a TAC run close to start and one at end of run.
- PS: Take data at the nominal GlueX setting for reference.
- Straight track data (solenoid off)
Non-production activities remaining (Jul 27)
- Second TAC run (> 7 days from end of run)
- Take a current rate scan on full target later in the run to investigate any rate dependent effects. Do we want to do this? When?
- PS magnet at nominal current?
Decommissioning / Deinstallation
- The Pb target will be secured upon completion of the experiment. It will be stored either in a safe in the hall if it is activated, or the safe in Hall D conference room if not.
- The Pb frame shield will be surveyed while the first stage is still up on the platform
- After uncabling of the MWPCs, the chamber cables will be stored along with the chambers in the EEL.
- The steel absorbers will be stored inside to prevent corrosion, likely in the Test Lab.
- The CTOF scintillators will be stored in the EEL along with the MWPCs. That gets them out of the hall radiation environment and makes them accessible even if Hall D is closed.