GlueX TOF Meeting, August 18, 2011
Contents
Location, Time
Thursday, August 18, 2011
10:00 am EDT
JLab: CEBAF Center, Room F326
Agenda
- Announcements
- Minutes from the last meeting
- Prototype Status
- Contract Status
Communication
Videoconference
- ESNet: 8542553
- EVO: EVO site
- direct meeting link
- Phone Bridge ID: 10 4388
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/halldweb/html/talks/2011-3Q
on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2011-3Q/ .
Minutes
Present:
- FSU: Sasha Ostrovidov
- JLab: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Simon Taylor, Beni Zihlmann
Statement of Work
Mark circulated a draft of the statement of work recently. Eugene had some questions:
- Is the resolution stated consistent with the proposal?
- Is the schedule realistic?
Mark received a copy of Elton's scintillator specification from CLAS. Eugene suggested getting a copy of the CLAS12 specification from Dan.
PMT Purchase
Mark is collecting documentation on the phototubes we are considering for purchase. Details of the procurement process are being discussed.
Items on the TOF Wiki Page
Mark has added a few items to the wiki page:
- Chuck Hutton's 3D drawing of the TOF mechanical conceptual design
- Paul Eugenio's photograph of a recently made light guide
- a TOF cheat sheet, with nominal module counts and a sketch
- another schematic of the H10534 phototube, this one without the dynode read-out
Prototype Report
Sasha has tried various splitters for one of the counters and measured mean-time resolution.
TDC (%) | ADC (%) | resolution (ps) |
---|---|---|
50 | 50 | 132 |
80 | 20 | 126 |
20 | 80 | about same as 50/50 |
A test with the trigger counter rotated so that 6-cm dimension is vertical is under-way.
Action Items
- Answer questions about SOW. -> Mark
- Get scintillator specifications used for purchase by CLAS12 (Dan Carman). -> Mark
- Get more splitters for FSU from Fernando. -> Mark