GlueX PID Meeting, September 3, 2010

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Location, Time

Friday, September 3, 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/2010-09 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/2010-09/ .

Agenda

  1. Announcements
  2. Minutes from the last meeting
  3. Time-of-Flight
    1. Prototype Status
    2. Calibration system: what is the plan?
    3. Mechanical interface to support structure: real estate planning
    4. MOU status
  4. Start Counter Status
  5. Target
    1. Refrigerator update
    2. MOU status
  6. Action Items

Minutes

pid meeting

pmt purchase 

 now have two hamatsu pmt's
 one with anode only
 one with anode and dynode
 gain 4.4 10^6
         5.3  10^6
     from H. documentation
 1.2 and 1.5 before
 2 10^6 is minimum
 running new tubes

MOU 

 meeting
 elton created a schedule in Fastrack
   project probably within budget
   contributions from shop offset increases in overhead
   allow us to move ahead with MOU on the JLab side 
   Paul will send out new version of MOU
   schedule posted on the docdb

Splitters 

 Fernando

Prototype 

 want to compare with splitting, 
 new trigger system, working, take higher rate, daq-wise
   still old trigger paddles
 new trigger paddles are there, but no room in current light-tight box
 received new JLab leading edge discriminator, doing test to compare with philips, prelim: Jlab looks better
 Sasha has written code to control thresholds
 results not completely ready

fernando also promised flash, want 12-bit, fernando offered 10-bit Next steps: Move out of black box, new trigger scheme, new wrapping Light guide design more or less ready changing thickness of the bar? to cover pmt surface, one paddle 3 cm thick in hand

Calibration system fibers on both sides with laser? common with whole experiment?

real estate: problem fitting in bent light guides and PMT's

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