GlueX Start Counter Meeting, March 21, 2013

GlueX Start Counter Meeting
Thursday, March 21, 2013
10 am EDT
JLab: CEBAF Center F326/327

Agenda

1. Announcements
2. Review minutes from previous meeting
3. Counter Construction
4. Light pulsing system or not?
5. Installation Document
6. Contract

Communication Information

Video Conferencing

• ESNet: 8542553
• ReadyTalk Desktop Sharing
  • In addition to the SeeVogh desktop sharing we will try the Readytalk version in parallel. You will need a web browser open to view the desktop at JLab.
  1. Go to http://esnet.readytalk.com
  2. In the "join a meeting" box enter the Hall D code: 3421244
  3. Fill in the participant registration form. A random name alone is sufficient.
• SeeVogh

Slides

Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2013-1Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2013-1Q/ .

Minutes

Present:

• FIU: Werner Boeglin, Eric Pooser
• JLab: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Beni Zihlmann

Review minutes from previous meeting

We went over the minutes from the March 7th meeting.

Eric reports that he re-did the gain measurement and indeed the ×5 amplifier was there for the previous measurement. He has sent Fernando detailed information on the new measurement. Essentially the old results need to be scaled by a factor of 5.

Counter Construction

Eric heard from Chuck Hurlbut of Eljen. They have reported that their first attempt at bending scintillators for us did not work. The bars did not hold their intended shape; on cooling they relaxed back somewhat toward their original flat shape. They are exploring modifications to their procedures. Eric will check this week with them on progress.

We should talk to Youri about the procedure that he used. FIU also had success with their bending procedure in the past.

1. Light pulsing system or not?
2. Installation Document
3. Contract