PrimEx-eta Short Term Run Plan
- 1 Last updated
- 2 Current Experiment
- 3 Notes
- 4 Run conditions
- 5 Run plan
- 6 Shift duties
- 7 Special instructions
28 August, by PrimEx-eta group
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.
- 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)
- Setup: TBA
- Production: TBA
- (Raw mode: config TBA)
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
- 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)
- 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 shift, Shift Checklist
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
- See Beam Line Detectors Shift / Collimator and Radiators on how to move radiators and collimator
- Check the radiation levels without the radiator and then with the radiator
- See the whiteboard (bottom RHS corner of the RH board) - there are columns of values expected without and with the radiator
- Retract the radiator
- Collimator in blocking position
- Ask MCC to do their harp scan
- Our harp scans: follow the instructions in Beam Line Detectors Shift/Radiator Harp Scan
- Use the harp scan extrapolation tool 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).
- Check camera west-cam.jlab.org, 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.
Call the expert. In case they suggest that you restart the DAQ, find information at Data Acquisition Shift.
If there are any, please add email@example.com to the notifications in the logbook entry.
Example double timing peaks: https://logbooks.jlab.org/entry/3933110
Shoulders on timing peaks might be features and not problems: https://logbooks.jlab.org/entry/3933867