Beam Modulation

In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.

PREX Main << Expert Tools

How to Run Beam Modulation

• First, make sure Coda is running

• You need to be logged in apar account on adqa3:

  •  ssh apar@adaq3 

• Go to directory:

  •  cd /adaqfs/home/apar/vowen/BMWClient/PyGreenMonster/ 

• Run beam modulation code:

  •  python3 ProductionModulation_Pause10Min.py 

• 1. Beam modulation will automatically run for 7 days
  2. In order to quit beam modulation

     •  control+c 

       to crash out of the beam modulation program.

     •  python3 gm_bmw_clearall.py 

       to clean up the DAQ records and release the EPICS FFB pause states.

Modulation online plots

Task for the analysis shift expert:

For each run, 

• Check the online plot ( the top plot on the BMW plot page), we should see all 7 coils (colorful bars) at least for one super cycle (one bunch). If not, check the beam trips, if this run has a lot of beam trips, then check the other more stable runs. If you still miss one or more coils, then please call Ye: 803-553-3570.
• Check the online plot ( on the BMW Cycle page ).

• BMOD meetings
• Beam Modulation Documentation Portal

Beam Mod Corrections

Corrections and Aggregation

Getting Started

First, you will need to find the slopes that you will use to perform the correction.

1. Login to the apar account on aonl2: ssh apar@aonl2
2. cd ~/PREX/prompt/beam-mod/scripts
3. If you haven't done a "gojapan" yet then source setup_japan.tcsh
4. Choose a list of runs that you would like to analyze and put them in a file called "filename.list"
   • To analyze a slug, choose the corresponding list in ~/PREX/prompt/collector/run_list/
5. Next, run ./dit_runlist.sh filename.list