Difference between revisions of "GlueX Start Counter Meeting, December 20, 2010"
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[http://evo.caltech.edu EVO]: [http://evo.caltech.edu/evoNext/koala.jnlp?meeting=eiese9vBvvata2aDIi direct meeting link], phone bridge ID: 7 7569 <!-- This link is good through Jan. 13, 2011 --><br> | [http://evo.caltech.edu EVO]: [http://evo.caltech.edu/evoNext/koala.jnlp?meeting=eiese9vBvvata2aDIi direct meeting link], phone bridge ID: 7 7569 <!-- This link is good through Jan. 13, 2011 --><br> | ||
'''Slides''': talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2010-12</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2010-12/ . | '''Slides''': talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2010-12</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2010-12/ . | ||
+ | |||
+ | =Minutes= | ||
+ | |||
+ | Start Counter Meeting Notes, 12/20 | ||
+ | |||
+ | werner, lei, mark, sascha | ||
+ | |||
+ | esr sheets sent to fiu | ||
+ | |||
+ | • 500$ test work for 8 pieces, down to 3 pieces | ||
+ | • can do bending for no charge | ||
+ | • failure rate 3 of 8 | ||
+ | • few hundred per counter | ||
+ | • perhaps buy in sheets | ||
+ | • data acquisition | ||
+ | |||
+ | neutrons | ||
+ | • linked to bcal page | ||
+ | • dose comparable to bcal SiPM region | ||
+ | • polyethylene shielding helps, studied for the tagger, factor of 7 | ||
+ | • support structure could be made out of shielding material | ||
+ | |||
+ | • W. wants to look with new SiPM. timing dominated by light output | ||
+ | • Richard simulated discriminator with damaged sipm, timing resolution OK with a factor of 50 increase in timing resolution, he expects 300 pe total | ||
+ | • W. can change current with temperature. | ||
+ | • sc rate 12 kHz, vs 1 MHz for microscope | ||
+ | • ask Carl how hot does it have to be. | ||
+ | |||
+ | • focus on SiPM | ||
+ | • same SiPM as BCAL | ||
+ | • W has a 4x4 array | ||
+ | • W has one, F10943, Hamamatsu | ||
+ | • ask Carl for another one | ||
+ | • language | ||
+ | • MRI possibility | ||
+ | |||
+ | • changing set-up to do light output measurement to accomodate SiPM as main detector | ||
+ | • new scintillators as well, 2 mm and 3 mm | ||
+ | • 12 and 15 mm wide: 30 element for 15 mm | ||
+ | • light output reduced by edges, wider has fewer edge area fractionally | ||
+ | |||
+ | • light guides design | ||
+ | • | ||
+ | • tin viewer |
Revision as of 19:19, 20 December 2010
Contents
Location, Time
Monday, December 20, 2010
1:30 pm EST
JLab: CEBAF Center, Room F228
Agenda
- Announcements
- Review minutes from previous meeting: all
- Start Counter News: Werner
- Neutron flux and Start Counter SiPM's: Sascha
- Photodetector decision process: all
- MOU plans: all
Communication
Conference Group, US: 800-377-8846, Canada: 888-276-7715, International: 302-709-8424
participant code: 77438230
ESNet: 8542553
EVO: direct meeting link, phone bridge ID: 7 7569
Slides: talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2010-12
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2010-12/ .
Minutes
Start Counter Meeting Notes, 12/20
werner, lei, mark, sascha
esr sheets sent to fiu
• 500$ test work for 8 pieces, down to 3 pieces • can do bending for no charge • failure rate 3 of 8 • few hundred per counter • perhaps buy in sheets • data acquisition
neutrons • linked to bcal page • dose comparable to bcal SiPM region • polyethylene shielding helps, studied for the tagger, factor of 7 • support structure could be made out of shielding material
• W. wants to look with new SiPM. timing dominated by light output • Richard simulated discriminator with damaged sipm, timing resolution OK with a factor of 50 increase in timing resolution, he expects 300 pe total • W. can change current with temperature. • sc rate 12 kHz, vs 1 MHz for microscope • ask Carl how hot does it have to be.
• focus on SiPM • same SiPM as BCAL • W has a 4x4 array • W has one, F10943, Hamamatsu • ask Carl for another one • language • MRI possibility
• changing set-up to do light output measurement to accomodate SiPM as main detector • new scintillators as well, 2 mm and 3 mm • 12 and 15 mm wide: 30 element for 15 mm • light output reduced by edges, wider has fewer edge area fractionally
• light guides design • • tin viewer