GlueX PID Meeting, July 23, 2010

Location, Time

Friday, July 23, 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/2010-07 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/2010-07/ .

Agenda

1. Announcements
2. Minutes from the last meeting
3. Time-of-Flight
   1. Prototype progress [1]
   2. Status of the MOU
4. Start Counter
   1. prototype progress
5. Target
   1. Status of the MOU
   2. Status of refrigerator plan
6. Action Items

Minutes

• FSU: Paul Eugenio, Sasha Ostrovidov
• JLab: Eugene Chudakov, Hovanes Egiyan, Mark Ito (chair), Yi Qiang, Sascha Somov, Simon Taylor, Elliott Wolin, Beni Zihlmann

Review of minutes from the last meeting

• PMT purchase: The eight phototubes purchased for the TOF prototype have not arrived at FSU.
• LED pulsing system: Paul reminded us that although we have been discussing a calibration system for the TOF in the Hall, the LED system they have put together at FSU is aimed solely at understanding the prototype.
• Trip to Columbia?: Mark raised the idea, originally suggested by Elton Smith, that some of us visit Ralf Gothe at the University of South Carolina to see his TOF set-up and discuss issues with him. USC is building the forward TOF for CLAS12. Elton was there recently and saw the set-up. We agreed that this was a good idea. Paul thought that a good time would be after the semester starts up.
• USC items: Paul has been taking to Ralf from time to time.
  • They are using the same multi-paddle readout scheme that FSU will try.
  • They are using CAEN discriminators with a 25 ps least count, finer that what we are planning to use.
  • They are using much thicker scintillator than we are.

Time-of-flight prototype progress

esr: comes with adhesive backing, with or without uv inhibitor • longevity: others have not reported problems, outdoor, solar energy applications • non-metalic • Paul IU interesed? Beni was thinking the same. • mirror surface

Paul has a sample, enough for one paddle, maybe two if not continuous. Wants to buy roll. 12-15 k$

held off on data acquisition until these studies are done now going to merging tdc and adc read-out

MOU sent draft, sent to me

• opportunity to grab additional lab space • stations for productions requires quasi-permanent space for various production steps • section 5.1: no discussion of calibration system • added elton's comments and corrections • start moving this through

talkto fernando, splitting

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Footnotes