GlueX PID Meeting, October 1, 2010
Location, Time
Friday, October 1, 2010
2:00 pm EDT
JLab: CEBAF Center, Room F326/7
ESNet: 8542553
EVO: direct meeting link
Conference Group: 800-377-8846, participant code: 77438230
Slides: talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2010-10
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/2010-10/ .
Agenda
- Announcements
- Minutes from the last meeting
- Time-of-Flight
- Prototype Status
- Calibration system
- Mechanical interface to support structure: real estate planning
- MOU status
- Start Counter Status
- MOU plans
- Target
- Refrigerator update
- MOU status
- Action Items
Minutes
Present: Beni, Simon, Mark, sasha, elton, eugene fsu: sasha O
Sasha
did some time resolution measurements with new pmt back to CAEN cfd to do time measurements old h: 2000v 124 ps new h: recommended voltage, 1750, 140 ps at 2000 v: 114 ps
did different wrapping w/ tyvek 114 112 with ESR 50-50 split: 116 ps, no effect
beni: worry about running pmt's at maximum voltage request for lifetime estimate, lifetime usually quoted in terms of charge
fernando has sent 2 splits and 2 inverters to fsu
new production lab, cleaning it, furnishing it
Beni: resolution goes linear with light output
tuning the constant fraction
have not gone to new trigger paddles
using new data acquition system
with leading edge discriminator: no timewalk correction 180 ps
(t1 - t2)/2
Paul sent new language , Elton put it in, will send to Glenn and Allison, liability language