Difference between revisions of "Short Term Run Plan"

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== Current Experiment ==
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Last updated - see smallprint at the bottom of the page
  
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Measuring the Charged Pion Polarizability in the &gamma;&gamma; -> &pi;<sup>+</sup>&pi;<sup>-</sup> reaction
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== Run Plan ==
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* Experiment number: E12-13-008 (use in BTA shift information)
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* Proposal: [https://www.jlab.org/exp_prog/proposals/13/PR12-13-008.pdf PAC link]
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== Run conditions ==
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Production running cycling through targets:
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* '''JD80-212 80um''' diamond, '''200 nA''' beam current
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** 800M events for '''0/90 deg''' and '''PARA''' setting
 +
** 800M events for '''0/90 deg''' and '''PERP''' setting
 +
** 800M events for '''45/135 deg''' and '''PARA''' setting
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** 800M events for '''45/135 deg''' and '''PERP''' setting
 +
* 400M events with '''4.5×10-4 Al 40um''' radiator (on goniometer!), '''300 nA''' beam current
 +
** Set '''new reference for amorphous radiator''' in CBREM GUI.
 +
* Runs should be no longer than 2 hours.
 +
* Keep the state of the production cycle on the whiteboard up-to-date.
  
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Production runs at 25nA with solid Pb target.
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== Special instructions ==
  
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* DAQ configuration name: PHYSICS_CPP (???)
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* Put '''comments''' for each run in the window opened by the DAQ.
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* Trigger file: CCAL_FCAL_PS_m9.conf
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** The comment should at least contain the following information "<radiator> <PARA/PERP>, <beam current>, LH2 target, <typical trigger rate>, <typical live time>, <issues if any>"
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* Keep the runs to 2h or less.
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** Example: "JD80-212 80um 45/135 PARA, 200nA, LH2 target, 81kHz, 93% live time"
 +
** Note: due to a software issue run comments may not show up in RCDB, but they are saved by the DAQ and will be later added to the RCDB entries.
 +
* Set a new '''amorphous reference''' in the CBREM GUI each time the amorphous radiator is used.
 +
* Be sure to hit the '''"PARA" or "PERP" button''' in the CBREM GUI when switching diamond targets. Otherwise the diamond alignment may be in an undefined state and the experiment may be flooded with low-energy photons.
 +
* Watch for '''locked-up FCAL HV bases''' towards the end of a run and clear them before starting a new run. See [https://halldweb.jlab.org/hdops/wiki/index.php/Forward_Calorimeter_Shift#FCAL_High_Voltage_channel_with_yellow_border].
 +
* Watch the '''DAQ lifetime''' when beam is on. Sometimes it drops to 0%. Just stopping and restarting the run fixes this issue in most cases.
 +
* [https://forms.gle/N1cU1GWgXr81pWDc6 '''New hdops wiki feedback form is here'''] please use this to report confusing or outdated wiki instruction pages.
  
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== Shift leader  ==
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== Medium Term (1 week) ==
  
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GlueX Guidelines are at [[Shift_Guidelines_for_Shift_Leader]]
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* No special plans.
  
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=== AI for CDC HV ===
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== Run conditions ==
  
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For FULL target runs only, set the CDC HV before the start of each run using the value suggested by the AI. 
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* Radiators: see [https://halldweb.jlab.org/hdops/wiki/index.php/Short_Term_Run_Plan#Run_Plan Run Plan]
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* There are instructions here https://wiki.jlab.org/epsciwiki/index.php/PrimEx_instructions   
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* Collimator: 5.0 mm
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* The AI uses measurements from epics averaged over the last minute, so the AI should be used just before starting a run, when the beam current is at its target value and has been steady for the past minute.
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* TPOL converter: Be 75 um
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* If for any reason this proves to be problematic, please revert to the nominal HV, 2125V, and contact Naomi.
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* Target: Liquid Hydrogen
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* DAQ configuration
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** RUN = PHYSICS_DIRC
 +
** SETUP = hd_all.tsg_HLN
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** Production: TRIGGER = FCAL_BCAL_PS_2025_mod_m9.conf
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** Raw-mode runs: TRIGGER = FCAL_BCAL_PS_2025_mod_m10.conf
  
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* for '''full target''' runs set the '''CDC HV''' before the start of each run using the value suggested by the AI. (see below [[Short_Term_Run_Plan#AI_for_CDC_HV]] for more info)
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== Current Experiment ==
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* for '''empty target''' runs, keep the CDC HV at 2125V'''
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GlueX II (with DIRC) & JEF and Alpha
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* In the BTM this is "GlueX 2 / JEF"
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=== run comment ===
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* E12-12-002 [https://misportal.jlab.org/mis/physics/experiments/viewProposal.cfm?paperId=834 GlueX II Proposal]
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* E12-10-011 [https://www.jlab.org/exp_prog/proposals/proposal_updates/PR12-10-011_pac37.pdf JEF proposal]
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Put a comment, eg "production 200nA LHe4", in the run comment window of the DAQ. This comment is needed for RCDB.
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* E12-12-002a [https://arxiv.org/abs/2405.01288 Alpha Proposal]
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The run comment window should appear automatically after a run has been started. Enter the comment and SAVE, do not exit.
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=== list of production runs ===
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* Include a separate list of the runs taken during the shift at the end of the summary (for example, see https://logbooks.jlab.org/entry/3936066)
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=== strip charts ===
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* Log the '''strip charts''' of beam current and position, see [[Slow_Controls_Shift#MYA_Archiver]]
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** on a gluon machine type myaPlot
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** right-click on the blank space of the myaPlot screen and select "Clone in new LivePlot"
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** right-click on the screen and select "Load a Configuration"
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** the configuration "beam_conditions" provides the beam current and position information
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** right-click on the screen and select "Make Elog Entry", make sure you do not log to ELOG but to '''HDLOG'''.
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=== BTA sheet ===
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* The '''BTA''' guidelines are at [[BTA_guidelines]]. <br> After loading the EPICS values, you may change the values, eg round them up or down.
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** '''BANU values''' >= 5 minutes must be reflected in the PCC value (else the aftermath doesnt work out for RC)
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** '''BANU values''' < 5 minutes may be set to 0
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== Shift worker ==
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GlueX Guidelines are at [[Guidelines_for_Remote_Worker_Shift]]
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'''Duties:'''
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=== shift checklist ===
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log per shift, [[Shift_Checklist]]
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=== data monitoring plots ===
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log per run, [[Online_Monitoring_Shift]]
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=== screen shot of CSS GlueX Overview ===
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log per run, [[Slow_Controls_Shift#EPICS_Control_Screens]]
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== After beam restoration ==
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* see [[Beam_Line_Detectors_Shift#Collimator_and_Radiators]] on how to move radiators and collimator
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* check the '''radiation levels''' without radiator and then with the radiator
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** see the whiteboard (bottom RHS corner of the RH board) - there are columns of values expected without and with the radiator
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* '''retract the radiator'''
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* '''collimator in blocking position'''
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* ask MCC to do their harp scan
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* our '''harp scans''': follow the instructions in [[Beam_Line_Detectors_Shift#Radiator_Harp_Scan]]   
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* use the '''harp scan extrapolation''' tool [http://zeus.phys.uconn.edu/halld/cobrems/harptool.cgi http://zeus.phys.uconn.edu/halld/cobrems/harptool.cgi] and post screenshots of the plots into the logbook (eg https://logbooks.jlab.org/entry/3929556).
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== Special instructions ==
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=== rootspy  ===
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If you have to restart rootspy, [[Online_Monitoring_Shift#Routine_Operation]], and it crashes, you might have to restart the monitoring process, find help at [[Online_Monitoring_Shift#Starting_and_stopping_the_Monitoring_System]].
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=== DAQ issues ===
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Call the expert. In case they suggest that you restart the DAQ, find information at [[Data_Acquisition_Shift]].
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=== timing problems ===
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If there are any, please add sdobbs@jlab.org to the notifications in the logbook entry.
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Example double timing peaks: https://logbooks.jlab.org/entry/3933110
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Shoulders on timing peaks might be features and not problems: https://logbooks.jlab.org/entry/3933867
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=== PS and/or PSC scalers freezing ===
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Keep an eye out for the PS and/or PSC scalers freezing. If it happens, then step 2+3 of the instructions 'Run PS Scalers' at [[Pair_Spectrometer_Shift]]  can be followed to reset them, it has to be done on gluon100.
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=== Hall Delta ===
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It's good practice to refer to our hall as Delta when talking to MCC, to make sure that there is no acoustic confusion between us and Hall B.
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Latest revision as of 12:11, 14 May 2025

Last updated - see smallprint at the bottom of the page

Run Plan

Production running cycling through targets:

  • JD80-212 80um diamond, 200 nA beam current
    • 800M events for 0/90 deg and PARA setting
    • 800M events for 0/90 deg and PERP setting
    • 800M events for 45/135 deg and PARA setting
    • 800M events for 45/135 deg and PERP setting
  • 400M events with 4.5×10-4 Al 40um radiator (on goniometer!), 300 nA beam current
    • Set new reference for amorphous radiator in CBREM GUI.
  • Runs should be no longer than 2 hours.
  • Keep the state of the production cycle on the whiteboard up-to-date.

Special instructions

  • Put comments for each run in the window opened by the DAQ.
    • The comment should at least contain the following information "<radiator> <PARA/PERP>, <beam current>, LH2 target, <typical trigger rate>, <typical live time>, <issues if any>"
    • Example: "JD80-212 80um 45/135 PARA, 200nA, LH2 target, 81kHz, 93% live time"
    • Note: due to a software issue run comments may not show up in RCDB, but they are saved by the DAQ and will be later added to the RCDB entries.
  • Set a new amorphous reference in the CBREM GUI each time the amorphous radiator is used.
  • Be sure to hit the "PARA" or "PERP" button in the CBREM GUI when switching diamond targets. Otherwise the diamond alignment may be in an undefined state and the experiment may be flooded with low-energy photons.
  • Watch for locked-up FCAL HV bases towards the end of a run and clear them before starting a new run. See [1].
  • Watch the DAQ lifetime when beam is on. Sometimes it drops to 0%. Just stopping and restarting the run fixes this issue in most cases.
  • New hdops wiki feedback form is here please use this to report confusing or outdated wiki instruction pages.

Medium Term (1 week)

  • No special plans.

Run conditions

  • Radiators: see Run Plan
  • Collimator: 5.0 mm
  • TPOL converter: Be 75 um
  • Target: Liquid Hydrogen
  • DAQ configuration
    • RUN = PHYSICS_DIRC
    • SETUP = hd_all.tsg_HLN
    • Production: TRIGGER = FCAL_BCAL_PS_2025_mod_m9.conf
    • Raw-mode runs: TRIGGER = FCAL_BCAL_PS_2025_mod_m10.conf

Current Experiment

GlueX II (with DIRC) & JEF and Alpha

Retrieved from "https://halldweb.jlab.org/hdops/wiki/index.php?title=Short_Term_Run_Plan&oldid=5014"