Difference between revisions of "Post-thanksgiving period"
From Hall D Ops Wiki
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## Check the beam position at the profiler. | ## Check the beam position at the profiler. | ||
# 2D scans (x: motor scan, y: beam scan) on the active collimator. Alex Barnes. 2h | # 2D scans (x: motor scan, y: beam scan) on the active collimator. Alex Barnes. 2h | ||
| − | # Meanwhile, monitor the rate | + | # Meanwhile, monitor the rate at the active target. Determine the beam position for maximal photon beam transmission. Log the corresponding 4 active collimator values. |
# Check background level in the pair spectrometer. Alex Somov. 0.5h | # Check background level in the pair spectrometer. Alex Somov. 0.5h | ||
# <span style="color:#ff00ff">DAQ Test (TBD) Sergei Furletov</span> | # <span style="color:#ff00ff">DAQ Test (TBD) Sergei Furletov</span> | ||
| Line 45: | Line 45: | ||
# BCal data taking with BCal trigger. (2*10^-5 radiator, 50 nA CW beam) Elton. 2h | # BCal data taking with BCal trigger. (2*10^-5 radiator, 50 nA CW beam) Elton. 2h | ||
# High luminosity run for CDC (same luminosity as for April 2015 run, except for the collimator size). (3*10^-4 radiator, 130 nA CW beam) Beni. 2h | # High luminosity run for CDC (same luminosity as for April 2015 run, except for the collimator size). (3*10^-4 radiator, 130 nA CW beam) Beni. 2h | ||
| − | # Staying in the same high luminosity as above, run 1h with 3mm collimator, if the beam position has been stable (~mm drifts at most). Beni. 1h | + | # Staying in the same high luminosity conditions as above, run 1h with 3mm collimator, if the beam position has been stable (~mm drifts at most). Beni. 1h |
#*Warn MCC that the beam position given by the active collimator is now irrelevant as long as our 3mm collimator is in place. Beam position stability should be checked on AD00. | #*Warn MCC that the beam position given by the active collimator is now irrelevant as long as our 3mm collimator is in place. Beam position stability should be checked on AD00. | ||
#*Monitor beam position on AD00 and 5C11 bpm. | #*Monitor beam position on AD00 and 5C11 bpm. | ||
Revision as of 19:48, 2 December 2014
Post-thanksgiving period
- Goal: Continue detector/trigger/DAQ checkout
- Prerequisites:
- Hall D detectors on.
- Solenoid magnetic field at 800A.
- Monitoring available in counting room:
- DAQ screens
- online monitoring screens
- slow control screens and alarm handlers
- Hall D electronic logbook open
- Run plan:
- re-establish beam:
- Initial conditions:
- Collimator in blocking conditions.
- No Radiator.
- Initial conditions:
- Request 50 nA CW beam.
- Check that radiation levels (tagger, collimator cave) are good.
- Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 61.50 nA)
- RAD102_P1= 0.170 mrad/hr (tagger area, gammas, between tagger and dump)
- RAD102_P2= 0.480 mrad/hr (tagger area, gammas, near electronics racks)
- RAD102_P3= 0.080 mrem/hr (tagger area, neutrons, near electronics racks)
- RAD101_P1= 0.006 mrad/hr (collimator cave, gammas)
- Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 61.50 nA)
- Insert 2*10^-5 radiator. Insert 5mm collimator. Check beam position on the Active collimator. Check that radiation levels are good.
- Typical levels are (for 2*10^-5 radiator, electron beam current 48 [67.5] nA)
- RAD102_P1= 3.500 [4.10] mrad/hr (tagger area, gammas, between tagger and dump)
- RAD102_P2= 9.900 [12.0] mrad/hr (tagger area, gammas, near electronics racks)
- RAD102_P3= 0.500 [0.75] mrem/hr (tagger area, neutrons, near electronics racks)
- RAD101_P1= 9.700 [14.0] mrad/hr (collimator cave, gammas)
- Typical levels are (for 2*10^-5 radiator, electron beam current 48 [67.5] nA)
- Check the beam position at the profiler.
- Check that radiation levels (tagger, collimator cave) are good.
- 2D scans (x: motor scan, y: beam scan) on the active collimator. Alex Barnes. 2h
- Meanwhile, monitor the rate at the active target. Determine the beam position for maximal photon beam transmission. Log the corresponding 4 active collimator values.
- Check background level in the pair spectrometer. Alex Somov. 0.5h
- DAQ Test (TBD) Sergei Furletov
- Trigger tests. Alex Somov
- Standard trigger optimization 4h
- ST&TOF trigger study 3h
- BCal&FCal energy balance trigger study 1h
- BCal data taking with BCal trigger. (2*10^-5 radiator, 50 nA CW beam) Elton. 2h
- High luminosity run for CDC (same luminosity as for April 2015 run, except for the collimator size). (3*10^-4 radiator, 130 nA CW beam) Beni. 2h
- Staying in the same high luminosity conditions as above, run 1h with 3mm collimator, if the beam position has been stable (~mm drifts at most). Beni. 1h
- Warn MCC that the beam position given by the active collimator is now irrelevant as long as our 3mm collimator is in place. Beam position stability should be checked on AD00.
- Monitor beam position on AD00 and 5C11 bpm.
- Monitor rates at the active target and profiler.
- Pair Spectrometer study (Alex Somov)
- Take pair spec. data with TagH and TagM. 3h
- Run with pair spec. data mixed with GlueX detector data. 0.5h
- When trigger/DAQ are optimized, take as much data as possible to increase FCal statistics. Manuel. Time: until Dec. 22nd
