Difference between revisions of "GlueX TOF Meeting, March 15, 2012"
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==Slides== | ==Slides== | ||
− | Talks can be deposited in the directory <code>/group/halld/www/ | + | 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/ . |
==Chairman's Cell Phone== | ==Chairman's Cell Phone== | ||
Line 44: | Line 44: | ||
* The main support structure has been changed from a bent 1/2-inch plate to machined U-channel, where the basic stock is a standard item. This simplifies the manufacturing considerably, reducing it to machining one edge and possible straightening. | * The main support structure has been changed from a bent 1/2-inch plate to machined U-channel, where the basic stock is a standard item. This simplifies the manufacturing considerably, reducing it to machining one edge and possible straightening. | ||
− | * Mark reported | + | * Mark reported Elton's concern about avoiding putting pressure on the scintillator to prevent crazing. This would mean support by the light guide only. |
** Tim pointed out that there might be significant stresses on the scintillator even then and wondered if that was a worry. Mark agreed to look into this. | ** Tim pointed out that there might be significant stresses on the scintillator even then and wondered if that was a worry. Mark agreed to look into this. | ||
** Chuck was concerned that the flat section of the light guide next to the scintillator was a bit narrow to be used to support the entire module, given other tolerances that might move the support area. The flat section is only about 1 cm wide. | ** Chuck was concerned that the flat section of the light guide next to the scintillator was a bit narrow to be used to support the entire module, given other tolerances that might move the support area. The flat section is only about 1 cm wide. | ||
− | full scale model | + | * Tim brought re-raised the idea of scale models |
− | 1/4 scale | + | ** a full-scale model of a corner of the array as Paul suggested last time |
− | + | ** a 1/4-scale of the entire assembly, to look for assembly/installation problems | |
− | + | ** If the FSU Physics machine shop is available for this kind of work, then there are huge cost savings. | |
+ | * We will aim for another design meeting on Tuesday, March 20. Mark will try to set it up. | ||
==Action Items== | ==Action Items== | ||
* Look into issue of avoiding pressure on the scintillator. -> Mark | * Look into issue of avoiding pressure on the scintillator. -> Mark | ||
+ | * Set up next design meeting. -> Mark |
Latest revision as of 00:14, 1 April 2015
Thursday, March 15, 2012
10:00 am EST
JLab: ARC, Room 428
Contents
Agenda
- Announcements
- Minutes from the last meeting
- Mechanical design: Tim, Chuck
- Prototype status: Paul, Sasha
- TDC choice: all
- Contract Status: Mark, Paul
- Calibration and Alignment discussion.
Communication
Videoconference
- ESNet: 8542553
- EVO: EVO site
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/ .
Chairman's Cell Phone
(757)504-0664.
Minutes
Present:
- FSU: Sasha Ostrovidov
- JLab: Chuck Hutton, Mark Ito (chair), Tim Whitlatch
Prototype Status
Sasha working on attaching the light guides to the prototype in a removable manner.
Mechanical Design
Tim and Chuck have been working on changes from discussions at the last meeting. He remarked that good recommendations were offered by the FSU team.
- The main support structure has been changed from a bent 1/2-inch plate to machined U-channel, where the basic stock is a standard item. This simplifies the manufacturing considerably, reducing it to machining one edge and possible straightening.
- Mark reported Elton's concern about avoiding putting pressure on the scintillator to prevent crazing. This would mean support by the light guide only.
- Tim pointed out that there might be significant stresses on the scintillator even then and wondered if that was a worry. Mark agreed to look into this.
- Chuck was concerned that the flat section of the light guide next to the scintillator was a bit narrow to be used to support the entire module, given other tolerances that might move the support area. The flat section is only about 1 cm wide.
- Tim brought re-raised the idea of scale models
- a full-scale model of a corner of the array as Paul suggested last time
- a 1/4-scale of the entire assembly, to look for assembly/installation problems
- If the FSU Physics machine shop is available for this kind of work, then there are huge cost savings.
- We will aim for another design meeting on Tuesday, March 20. Mark will try to set it up.
Action Items
- Look into issue of avoiding pressure on the scintillator. -> Mark
- Set up next design meeting. -> Mark