Difference between revisions of "GlueX PID Meeting, July 9, 2010"
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## Status of refrigerator plan | ## Status of refrigerator plan | ||
# [[Time-of-Flight/Start-Counter Action Items|Action Items]] | # [[Time-of-Flight/Start-Counter Action Items|Action Items]] | ||
| + | |||
| + | =Miutes= | ||
| + | |||
| + | pid meeting, 7/9 | ||
| + | |||
| + | Elton, Tim, Elliott, Mark, yi, beni, eugene, sascha | ||
| + | FSU sasha | ||
| + | |||
| + | cryo review, tim still needs to do this, cost estimate needed as well | ||
| + | chris confident about He4, but need verification | ||
| + | chris was going to talk to vendor | ||
| + | |||
| + | LED pulser system up running, not yet tried with counter | ||
| + | used for time walk corrections for time-of-flight | ||
| + | useful but a lot of effort | ||
| + | could it have been done with the data, but difficult | ||
| + | data does not have a start time | ||
| + | need to have the scintillator excite | ||
| + | |||
| + | Elton down at USC, similar things being done for CLAS12 | ||
| + | they decided against a laser system, will do everything with data | ||
| + | with cosmic ray set up they got time-walk correction | ||
| + | we will have two planes, that will help | ||
| + | large dynamic range in energies needed | ||
| + | if it can be done from the data, the calibration system will not be done | ||
| + | need a study | ||
| + | |||
| + | Flash ADC would be desireable at some time. | ||
| + | time difference idea: Yi | ||
| + | |||
| + | trapezoidal light guide not large enough to cover PMT | ||
| + | |||
| + | new data acquisition system written, not used yet | ||
| + | doing measurements with different wrappings want to keep set-up constant | ||
| + | |||
| + | 40 cm long trigger counters | ||
| + | |||
| + | cosmic ray measurements using different | ||
| + | pedestal reduction program, 400-> 200 counts | ||
| + | adjustment on ADC | ||
| + | 3 days to collect statistics | ||
| + | new material ESR/VM2000, mylar to come | ||
| + | then switch to new daq and led pulser | ||
| + | |||
| + | Ralf using aluminized mylar, works well in Germany | ||
| + | want a stable material | ||
| + | CLAS6 used aluminum foil | ||
| + | |||
| + | Eugene | ||
| + | use pair spectrometer, change pair spectrometer magnet to vary opening angle, solenoid will move pairs around | ||
| + | acceptance: small opening angle to get through beam tube | ||
| + | 2 cm target, vacuum chamber | ||
| + | |||
---- | ---- | ||
Revision as of 15:46, 9 July 2010
Location, Time
Friday, July 9, 2010
2:00 pm EDT
JLab: CEBAF Center, Room F326/7
ESNet: 8542553
EVO: direct meeting link[1]
Conference Group: 800-377-8846, participant code: 77438230
Slides: talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2010-07 on the JLab CUE (you have to be a member of the "halld" group). This directory is accessible from the web at https://halldweb1.jlab.org/talks/2010-07/ .
Agenda
- Announcements
- Minutes from the last meeting
- Time-of-Flight
- Prototype progress [1]
- Status of the MOU
- Start Counter
- prototype progress
- Target
- Status of the MOU
- Status of refrigerator plan
- Action Items
Miutes
pid meeting, 7/9
Elton, Tim, Elliott, Mark, yi, beni, eugene, sascha FSU sasha
cryo review, tim still needs to do this, cost estimate needed as well chris confident about He4, but need verification chris was going to talk to vendor
LED pulser system up running, not yet tried with counter used for time walk corrections for time-of-flight useful but a lot of effort could it have been done with the data, but difficult data does not have a start time need to have the scintillator excite
Elton down at USC, similar things being done for CLAS12 they decided against a laser system, will do everything with data with cosmic ray set up they got time-walk correction we will have two planes, that will help large dynamic range in energies needed if it can be done from the data, the calibration system will not be done need a study
Flash ADC would be desireable at some time. time difference idea: Yi
trapezoidal light guide not large enough to cover PMT
new data acquisition system written, not used yet doing measurements with different wrappings want to keep set-up constant
40 cm long trigger counters
cosmic ray measurements using different pedestal reduction program, 400-> 200 counts adjustment on ADC 3 days to collect statistics new material ESR/VM2000, mylar to come then switch to new daq and led pulser
Ralf using aluminized mylar, works well in Germany want a stable material CLAS6 used aluminum foil
Eugene use pair spectrometer, change pair spectrometer magnet to vary opening angle, solenoid will move pairs around acceptance: small opening angle to get through beam tube 2 cm target, vacuum chamber
Footnotes
- ↑ This link is good through 8/20
