Difference between revisions of "GlueX Start Counter Meeting, February 9, 2012"

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GlueX Start Counter Meeting<br>
 
GlueX Start Counter Meeting<br>
−
Thursday, January 12, 2012<br>
+
Thursday, February 9, 2012<br>
 
10 am EST<br>
 
10 am EST<br>
 
JLab: CEBAF Center, Room F326<br>
 
JLab: CEBAF Center, Room F326<br>
Line 7: Line 7:
  
 
# Announcements
 
# Announcements
−
# Review [[GlueX Start Counter Meeting, December 15, 2011#Minutes|minutes from previous meeting]]
+
# Review [[GlueX Start Counter Meeting, January 12, 2012#Minutes|minutes from previous meeting]]
 
# Prototype Report
 
# Prototype Report
 
# SiPM configuration
 
# SiPM configuration
 
#* [[Conference Call with Hamamatsu Representatives, January 5, 2012|Conference call with Hamamatsu representatives]]
 
#* [[Conference Call with Hamamatsu Representatives, January 5, 2012|Conference call with Hamamatsu representatives]]
 +
#* [http://www.jlab.org/Hall-D/procurements/start_counter_sipm/Quote%2328298,%20SMD%20MPPC.pdf Quote from Hamamatsu]
 +
#* [https://halldweb.jlab.org/detectors/start_counter/ITO_1_27_12.pptx Drawing from Chuck]
 
# Contract Status
 
# Contract Status
−
# Simulation Status
+
# Simulation [[Start_Counter_Simulations|Status]]
  
 
=Communication Information=
 
=Communication Information=
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==Video Conferencing==
 
==Video Conferencing==
  
−
* ESNet: 8542554 (non-standard and incorrect for this meeting)
+
* ESNet: 8542553
 
* [http://evo.caltech.edu/ EVO]:
 
* [http://evo.caltech.edu/ EVO]:
 
** Meeting URL: http://evo.caltech.edu/evoNext/koala.jnlp?meeting=e9eIeivevnaeaBIsaaI9 <!--good through April 5-->
 
** Meeting URL: http://evo.caltech.edu/evoNext/koala.jnlp?meeting=e9eIeivevnaeaBIsaaI9 <!--good through April 5-->
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==Slides==
 
==Slides==
  
−
Talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2012-1Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2012-1Q/ .
+
Talks can be deposited in the directory <code>/group/halld/www/halldweb/html/talks/2012-1Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2012-1Q/ .
 +
 
 +
==Chair's Cell Phone==
 +
 
 +
(757)504-0664
  
 
=Minutes=
 
=Minutes=
  
−
Present: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann
+
Present:
 +
* '''FIU''': Werner Boeglin, Lei Guo, Puneet Khetarpal, Eric Pooser
 +
* '''JLab''': Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann
  
−
==SiPM Meeting==
+
==SiPM configuration==
  
−
We reviewed notes from last week's [[Conference Call with Hamamatsu Representatives, January 5, 2012|conference call with Hamamatsu representatives]].
+
* We reviewed the [[Conference Call with Hamamatsu Representatives, January 5, 2012|Conference call with Hamamatsu representatives]] and the solution we have decided to pursue: 4 SMD-type 3×3 mm devices in a row.
 +
* We reviewed the recently received [http://www.jlab.org/Hall-D/procurements/start_counter_sipm/Quote%2328298,%20SMD%20MPPC.pdf quote from Hamamatsu] for the relevant devices. (See Mark for the username and password).
 +
* We looked at the latest drawings from Chuck, [https://halldweb.jlab.org/detectors/start_counter/ITO_1_27_12.pptx 3-D close-up version] and [https://halldweb.jlab.org/talks/2012-1Q/SC_LAYOUT_1_26_12.pdf line-drawing version] and discussed various mechanical considerations for the read-out design.
  
−
* Mark spoke with Werner Boeglin by phone earlier in the week. Werner had reviewed the notes from the meeting and did not have any issues with the general direction we agreed on. He mentioned that the 4-device configuration with no light guide would probably do no worse than an arrangement with more complete coverage requiring a light guide. He also endorsed Carl Zorn's suggestion that we use 100 micron pixels for this application.
+
==Prototype Report==
−
* We discussed generally the geometry and associated considerations. If four devices are used and they are placed on a 4 mm pitch, then the center of the inner edge of the counters sits at 76.1 mm for 30-fold azimuthal segmentation. Other arrangements discussed were varying the number of SiPM devices, the number of counters, leaving room for some kind of vertex detection, etc.
+
−
* Mark discussed the project briefly with Fernando Barbosa a few days ago. Fernando has requested a schedule for the the project. He also mentioned that right now his highest priority is the SiPM read-out for the pair spectrometer. He will start on the start counter design after that.
+
  
−
==Review of Minutes from the Previous Meeting==
+
* Werner has placed an order with [http://www.mcnealplasticmachining.com/ McNeal] to make a sample counter.
  
−
We reviewed [[GlueX Start Counter Meeting, December 15, 2011#Minutes|minutes from the December 15th meeting]].
+
==Simulation Report==
  
−
* Earlier, Werner mentioned on the phone that one of the companies [which one?] identified to shape the scintillator had received the samples he sent to them.
+
Puneet showed results recent results from [[Start Counter Simulations|new studies that model light collection]] in the counters. He uses Geant4. He described:
−
* We agreed that a lot had been learned about how to proceed with SiPM read-out since last time.
+
# Geometry and set-up
 +
# Material properties used
 +
# Optical surface options explored
 +
Results are not inconsistent with what has been observed on the bench. See his wiki page for details.

Latest revision as of 06:10, 1 April 2015

GlueX Start Counter Meeting
Thursday, February 9, 2012
10 am EST
JLab: CEBAF Center, Room F326

Agenda

  1. Announcements
  2. Review minutes from previous meeting
  3. Prototype Report
  4. SiPM configuration
  5. Contract Status
  6. Simulation Status

Communication Information

Video Conferencing

Slides

Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2012-1Q on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2012-1Q/ .

Chair's Cell Phone

(757)504-0664

Minutes

Present:

  • FIU: Werner Boeglin, Lei Guo, Puneet Khetarpal, Eric Pooser
  • JLab: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann

SiPM configuration

Prototype Report

  • Werner has placed an order with McNeal to make a sample counter.

Simulation Report

Puneet showed results recent results from new studies that model light collection in the counters. He uses Geant4. He described:

  1. Geometry and set-up
  2. Material properties used
  3. Optical surface options explored

Results are not inconsistent with what has been observed on the bench. See his wiki page for details.

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