Tuesday, March 23: OWL Shift

Go back to Daily Run Plan Daily Run Plans

• General considerations
  • Brad Sawatzky is the current Run Coordinator. Please contact directly via RC phone 757-876-1787
  • Follow the generic Instructions for shift takers
  • Shift leaders: Please make sure to fill out the beam time accounting form and write a "Shift Summary" log entry at the end of your shift regardless if there is beam or not.
  • In general, Hall technical staff should not be contacted by the shift crew - please call the RC first.
  • The target operator is required to supervise the cryo-target.
  • Make sure to use the DVCS CODA configuration for all runs (even when taking single arm HRS data).

• Instructions for this shift

1) When beam first arrives to the Hall

 - Ask MCC to run the Harps: 1C18A/B and 1C04A/B
 - halog the results

2) Confirm the beam position using the carbon hole target. 3) Run the right arm optic scan described here:

 Here is the run plan for the R-HRS Q1 tune. This can be done before
 moving to LH2 target for DVCS running.

 1. Move target to Optics
 2. Set P0= 1.0 GeV/c, Q1 current = 192 A
 3. Set R-HRS prescale ps1=1, others=0 (should be already set, but check)
 4. Assuming 20uA beam current, take 5 min (or ~100k events) run for each
 of these Q1 currents:
 Q1 current:
  192 A
  202 A
  223 A
  234 A
 5. Move to LH2 target to continue DVCS runs
 6. Change R-HRS P0 = 1.896 GeV (need to cycle Q2/Q3)
 7. Set Q1 current to 403.8 A
 8. When D1 is ready start R-HRS runs.
 9. halog all the run numbers with Q1 current

• • • Beamline commissioning how-to.