Difference between revisions of "Post-thanksgiving period"
From Hall D Ops Wiki
(Created page with "==Tune Photon Beam== * '''Goal''': Continue detector/trigger/DAQ checkout * '''Prerequisites''': # Hall D detectors on. # Solenoid magnetic field at 800A. # Monitoring avai...") |
(→Tune Photon Beam) |
||
| Line 13: | Line 13: | ||
#** [https://hdops.jlab.org/wiki/index.php/Slow_Controls_Shift Procedure for bringing up slow control and alarm screens] | #** [https://hdops.jlab.org/wiki/index.php/Slow_Controls_Shift Procedure for bringing up slow control and alarm screens] | ||
#* [https://logbooks.jlab.org/book/halld Hall D electronic logbook] open | #* [https://logbooks.jlab.org/book/halld Hall D electronic logbook] open | ||
| − | |||
# re-establish beam: | # re-establish beam: | ||
| Line 24: | Line 23: | ||
## Check that radiation levels (tagger, collimator cave) are good. | ## Check that radiation levels (tagger, collimator cave) are good. | ||
##* Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 61.50 nA) | ##* 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_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_P2= 0.480 mrad/hr (tagger area, gammas, near electronics racks) |
| − | RAD102_P3= 0.080 mrem/hr (tagger area, neutrons, near electronics racks) | + | ##**RAD102_P3= 0.080 mrem/hr (tagger area, neutrons, near electronics racks) |
| − | RAD101_P1= 0.006 mrad/hr (collimator cave, gamma) | + | ##**RAD101_P1= 0.006 mrad/hr (collimator cave, gamma) |
## Insert 2*10^-5 radiator. Insert 5mm collimator. Check beam position on the Active collimator. Check that radiation levels are good. | ## 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) | ##* 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_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_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) | + | ##**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, 5mm collimator) | + | ##**RAD101_P1= 9.700 [14.0] mrad/hr (collimator cave, gammas, 5mm collimator) |
## 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 | ||
| + | # Meanwhile, monitor the rate in 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 | ||
| + | #* | ||
Revision as of 19:29, 2 December 2014
Tune Photon Beam
- 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
- 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, gamma)
- 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, 5mm collimator)
- 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 in 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
