GlueX TOF Meeting, May 27, 2011
Contents
Location, Time
Friday, May 26, 2011
2:00 pm EDT
JLab: CEBAF Center, Room F326
Agenda
- Announcements
- Minutes from the last meeting
- Prototype Status [1]
- Contract Status
Communication
Videoconference
- ESNet: 8542553
- EVO: EVO site
- direct meeting link
- Phone Bridge ID: 9 8450
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#
Slides
Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2011-2Q
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-2Q/ .
Minutes
Present:
- FSU: Sasha Ostrovidov
- JLab: Eugene Chudakov, Mark Ito (chair), Elton Smith, Sascha Somov, Simon Taylor, Ivan Tolstukhin, Beni Zihlmann
Status Report from Paul
Paul Eugenio could not join us, but sent in a written report:
We received the VM2000ma from 3M, and I sent 3 sheets to FIU. We also received the VXS crate, and have swapped it into our test system. We discovered that our test counter PMTs were sagging and separating at the light guide. This was due to using a silicon cookie rather than a glued pmt/light guide joint. We have glued all PMTs now, and Sasha is ready to restart tests.
I have two new students joining our tof effort: Aristedis Tsaris and Hussein Al Goul. They have started getting familiar with our test set up, measuring plateaus, efficiencies, and spectra. They are constructing short paddles and will study single pmt readout and coupling of light from bar to bar, but they will now spend a few weeks at JLab for Hugs.
Status Report from Sasha
Sasha reported on several items.
- The new crate is working well. Now, all modules can be plugged into the single crate with no sag in the power supplies.
Summary of Goals from Beni
repeat resolution measurements with cosmics
light guide production, 6 of them, one not bent now light guides glued
one straight, one bent comparison tapered section factor of two longer, with same overall length
see effect of taper both straight light guides
try elgen discriminator with new set-up
talked to tim
has assigned chuck hutton as designer will talk next week with chuck, get him in contact with designer at FSU
buy light guide material
need to pick that up, they are running out