GlueX Start Counter Meeting, March 25, 2011

From GlueXWiki
Revision as of 17:23, 31 March 2015 by Marki (Talk | contribs) (Text replacement - "www/halldweb1/" to "www/halldweb/")

Jump to: navigation, search

Location, Time

Friday, March 25, 2011
4:30 pm EDT
JLab: CEBAF Center, Room F326/7


  1. Announcements
  2. Review minutes from previous meeting: all
  3. Start Counter News
  4. MOU status

Communication Information


To connect by telephone:

  1. dial:
  2. enter access code followed by the # sign: 3421244#

Video Conferencing


Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2011-1Q on the JLab CUE. This directory is accessible from the web at . You have to be a member of the "halld" Unix group to do this.


Present: Werner Boeglin, Eugene Chudakov, Lei Guo, Mark Ito (chair), Simon Taylor, Beni Zihlmann

We had an informal discussion of various issues related to the start counter.

  • Werner is going to test some 3x3 mm fibers for light guides
  • Currently FIU is seeing 20 ns rise time from the 16 cell array.
  • Werner is interested in getting another pre-amp for the SiPM*
  • He is also interested in obtaining a Peltier element; he is hopeful that cooling the SiPM may help timing resolution.
  • Mark will set up a conference call with Werner, Fernando Barbosa, and Yi Qiang to discuss the previous two items.
  • Beni lent the FIU guys an Ortec constant fraction discriminator (physically handed it over) to see if that helps with timing resolution in their set-up.
  • Puneet Khetarpal, an FIU post-doc, might be able to start working on the start counter project part-time. His main responsibilities are in Hall B.
  • The MOU between FIU and JLab will be circulated next week among Hall D staff for comment.