Difference between revisions of "Tuesday, March 23: OWL Shift"
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* Instructions for this shift | * Instructions for this shift | ||
| − | ** 1) When beam first arrives to the Hall | + | ** 0) <b>Check the beam position</b> |
| + | *** - request beam position: BPM A=(+2.5:-0.5), BPM B=(+2.5:+0.5) | ||
| + | ** 1) <b>When beam first arrives to the Hall</b> | ||
*** - Ask MCC to run the Harps: 1C18A/B and 1C04A/B | *** - Ask MCC to run the Harps: 1C18A/B and 1C04A/B | ||
*** - halog the results | *** - halog the results | ||
| − | ** 2) Confirm the beam position using the carbon hole target. | + | ** 2) <b>Confirm the beam position using the carbon hole target. </b> |
| − | ** 3) Run the right arm optic scan described here: | + | *** - request CW 5uA without raster |
| + | *** - check the scaler rate rastered target up to 2x2 | ||
| + | ** 3) <b>Run the right arm optic scan described here: (at the same time, take single DVCS run)</b> | ||
*** Here is the run plan for the R-HRS Q1 tune. This can be done before moving to LH2 target for DVCS running. | *** 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 | *** 1. Move target to Optics | ||
| Line 20: | Line 24: | ||
*** 3. Set R-HRS prescale ps1=1, others=0 (should be already set, but check) | *** 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: | *** 4. Assuming 20uA beam current, take 5 min (or ~100k events) run for each of these Q1 currents: | ||
| − | ** | + | ** ==> Q1 current: (current change is fast, no need to beam off) |
| − | *** | + | *** ===> 192 A |
| − | *** | + | *** ===> 202 A |
| − | *** | + | *** ===> 223 A |
| − | *** | + | *** ===> 234 A |
| − | ** 5. Move to LH2 target to continue DVCS runs | + | *** 5. Move to LH2 target to continue DVCS runs |
| − | ** 6. Change R-HRS P0 = 1.896 GeV (need to cycle Q2/Q3) - (turn off regulator for Q2/Q3, set I =1600A. turn on regulator) | + | *** 6. Change R-HRS P0 = 1.896 GeV (need to cycle Q2/Q3) - (turn off regulator for Q2/Q3, set I =1600A. turn on regulator) |
| − | ** 7. Set Q1 current to 403.8 A | + | *** 7. Set Q1 current to 403.8 A |
| − | ** 8. When D1 is ready start R-HRS runs. | + | *** 8. When D1 is ready start R-HRS runs. |
| − | ** 9. halog all the run numbers with Q1 current | + | *** 9. halog all the run numbers with Q1 current |
| + | |||
| + | ** 4) <b>Turn on DVCS HV</b> | ||
| + | ** 5) <b>Move to LH2, 2x2 raster, 10uA CW</b> | ||
| + | *** - Take 2 1hr runs with DVCS DAQ | ||
| + | *** - After the first run finished, page Carlos. He will change the calorimeter to the 2nd elastic setting | ||
| + | |||
***[https://hallaweb.jlab.org/wiki/index.php/Beamline Beamline commissioning how-to.] | ***[https://hallaweb.jlab.org/wiki/index.php/Beamline Beamline commissioning how-to.] | ||
Latest revision as of 05:23, 24 March 2015
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
- 0) Check the beam position
- - request beam position: BPM A=(+2.5:-0.5), BPM B=(+2.5:+0.5)
- 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.
- - request CW 5uA without raster
- - check the scaler rate rastered target up to 2x2
- 3) Run the right arm optic scan described here: (at the same time, take single DVCS run)
- 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: (current change is fast, no need to beam off)
- ===> 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) - (turn off regulator for Q2/Q3, set I =1600A. turn on regulator)
- 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
- 0) Check the beam position
- 4) Turn on DVCS HV
- 5) Move to LH2, 2x2 raster, 10uA CW
- - Take 2 1hr runs with DVCS DAQ
- - After the first run finished, page Carlos. He will change the calorimeter to the 2nd elastic setting
