Difference between revisions of "GlueX Start Counter Meeting, January 27, 2011"
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# Review [[GlueX Start Counter Meeting, December 20, 2010#Minutes|minutes from previous meeting]]: all | # Review [[GlueX Start Counter Meeting, December 20, 2010#Minutes|minutes from previous meeting]]: all | ||
# Start Counter News: Werner, Lei, Eric | # Start Counter News: Werner, Lei, Eric | ||
− | * | + | #* For pictures see http://wanda.fiu.edu/boeglinw/GlueX/SC |
# MOU plans: all | # MOU plans: all | ||
Revision as of 09:54, 28 January 2011
Contents
Location, Time
Thursday, January 27, 2011
3:30 pm EST
JLab: CEBAF Center, Room F326/7
Agenda
- Announcements
- Review minutes from previous meeting: all
- Start Counter News: Werner, Lei, Eric
- For pictures see http://wanda.fiu.edu/boeglinw/GlueX/SC
- MOU plans: all
Communication Information
Telephone
To connect by telephone:
- dial:
- US and Canada: (866)740-1260 (toll free)
- International: (303)248-0285 (toll call) or look up toll-free number at http://www.readytalk.com/intl
- enter access code followed by the # sign: 3421244#
Video Conferencing
- ESNet: 8542553
- EVO:
- Meeting URL: http://evo.caltech.edu/evoNext/koala.jnlp?meeting=eaeDetvlv8a9asasIa
- Phone Bridge ID: 8 5557
Slides
Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2011-1Q
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-1Q/ . You have to be a member of the "halld" Unix group to do this.
Minutes
Present:
- FIU: Werner Boeglin, Lei Guo, Eric Pooser
- JLab: Eugene Chudakov, Mark Ito (chair), Sascha Somov, Simon Taylor, Beni Zihlmann
$190 a piece, sent to furniture company, with diamond milled edges plastic craft : bend cut and polish
sasha: richard wrote a note estimating impact of dark current • timing resolution not much affected by rate • went to GHz • photonique recover rate gives fluctuation • hamamtsu has faster recovery rate
measurements with new SiPM • timing resolution a bit disappointing • more test with the new scintillator, with PMT ∘ light output ∘ attentuaion length • then with SiPM ∘ even with same amount of light, get factor 1.5-2 worse resolution ∘ pulse with led works well with SiPM ∘ more study needed ∘ cannot see single pe peak, pedestal is wide
50 mV signal from SiPM, amplified to 200 mV ADC uses direct signal
don't think it is the amount of light played a bit with bias voltage, nominally 71 V using what Carl ways
using cfd's
peltier element
werner will send MOU
time resolution requirement: what is it? what do we put in MOU.
E. put in purpose
W. may take some details out.
photo-detectors in a region of substantial magnetic field
sascha: use the tagger to help
total 56 K$ labor: 170 man-weeks for labor