PrimEx-eta Short Term Run Plan

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Last updated

28 August, by PrimEx-eta group

Current Experiment

Measure the η-meson radiative decay width (η -> γγ)

  • Experiment number: E12-10-011 (use in BTA shift information)
  • Proposal: PAC link
  • Spokesperson: Ashot Gasparian


  • All GlueX detectors except DIRC
  • Plus, a calorimeter (CCAL) 4 m downstream FCAL to cover polar between 0.2 and 1 degree and measure Compton events in combination with FCAL.

Run conditions

Hall D counting room whiteboard

  • Radiator (Amorphous) 10 µm Al (2 x 10-5 RL)
  • Collimator 5 mm
  • TPOL converter Be 750 µm
  • Runs are no more than 2 hours - see whiteboard for the production cycle
  • Targets, currently Empty Be target IN
    • 4He target: cryogenic target (OUT)
    • Empty 4He target (OUT)
    • Be target (OUT)
    • Empty Be target (IN)

DAQ config

  • Setup: TBA
  • Production: TBA
  • (Raw mode: config TBA)

Run plan

See the daily plan in Run Coordination Meetings:Fall2022 and also the counting house whiteboard

Shift duties

GlueX Guidelines are at Shift Guidelines for_Shift Leader and Guidelines for Remote Worker Shift

Run comments

Put information, eg "production 200 nA He", in the run comments window of the DAQ. The comments are needed for RCDB.

The run comments window should appear automatically after a run has been started. Enter comments and SAVE, do not exit. If the run comments window is visible, check first whether it is hiding eg on the upper workspace. If it is not up, restart the DAQ before the start of the next run.

List of production runs

  • Include a separate list of the runs taken during the shift at the end of the shift leader summary
  • Please include the following:
    run number, start & stop times, beam current, Be or He4 target / no target/empty target, radiator, daq configuration, daq event rate, daq livetime, number of events, production/test/junk/any_other_comment

BTA sheet

  • The BTA guidelines are at BTA_guidelines.
    After loading the EPICS values, you may change the values, eg round them up or down.
    • BANU values >= 5 minutes must be reflected in the PCC value (else the aftermath doesnt work out for RC)
    • BANU values < 5 minutes may be set to 0
    • UED: unplanned experiment down (hardware failure)

Strip charts

  • Log the strip charts of beam current and position, see Slow_Controls_Shift#MYA_Archiver
    • On a gluon machine type myaPlot
    • Right-click on the blank space of the myaPlot screen and select "Clone in new LivePlot"
    • Right-click on the screen and select "Load a Configuration"
    • The configuration "beam_conditions" provides the beam current and position information
    • Right-click on the screen and select "Make Elog Entry", make sure you do not log to ELOG but to HDLOG.

Data monitoring plots

Log per run, Online Monitoring Shift

screen shot of CSS GlueX Overview

Log per run, Slow_Controls_Shift#EPICS_Control_Screens , also see screenshot tool for making E-log entries

Shift checklist

Log per shift, Shift Checklist

Special instructions

Hall Delta

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.

After beam restoration

Target status

  • Check camera, select Target view, if necessary


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.

DAQ issues

Call the expert. In case they suggest that you restart the DAQ, find information at Data Acquisition Shift.

Timing problems

If there are any, please add to the notifications in the logbook entry.

Example double timing peaks:

Shoulders on timing peaks might be features and not problems: