Difference between revisions of "GlueX PID Meeting, October 1, 2010"

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(looks good)
 
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## MOU status
 
## MOU status
 
# [[Time-of-Flight/Start-Counter Action Items|Action Items]]
 
# [[Time-of-Flight/Start-Counter Action Items|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

Revision as of 15:02, 1 October 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

  1. Announcements
  2. Minutes from the last meeting
  3. Time-of-Flight
    1. Prototype Status
    2. Calibration system
    3. Mechanical interface to support structure: real estate planning
    4. MOU status
  4. Start Counter Status
    1. MOU plans
  5. Target
    1. Refrigerator update
    2. MOU status
  6. 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

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