Difference between revisions of "GlueX TOF Meeting, April 11, 2013"
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Talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2013-2Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2013-2Q/ . | Talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2013-2Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2013-2Q/ . | ||
+ | |||
+ | =Minutes= | ||
+ | |||
+ | Present: | ||
+ | * '''FIU''': Sasha Ostrovidov | ||
+ | * '''JLab''': Chuck Hutton, Beni Zihlmann (chair) | ||
+ | |||
+ | # first 5 production paddles have light guides glued to them and are now in the wrapping room for wrapping. | ||
+ | 2) the wrapping procedure has been changed slightly such that the light | ||
+ | guide | ||
+ | is wrapped with a separate independent piece of reflective material | ||
+ | that is | ||
+ | templated to fit the light guide better. A small strip of aluminium | ||
+ | foils is used | ||
+ | at the intersection between the scintillator and the light guide. | ||
+ | 3) currently Paul Eugenio is doing the wrapping. He has not yet trained | ||
+ | students | ||
+ | to do the job. And because he is currently at the APS meeting the | ||
+ | wrapping is | ||
+ | on hold. | ||
+ | 4) Maurizio is polishing the light guides. 70 LG have been already polished. | ||
+ | 5) 10 out of the 92 production bars have been measured in the dark box using | ||
+ | UV led to determine the attenuation length. It was found that one | ||
+ | paddle had | ||
+ | a very small attenuation length. After contacting ELJEN the | ||
+ | manufacturer agreed | ||
+ | to send them a new paddle. According to them it could be that this | ||
+ | paddle came | ||
+ | from the edge of a batch and probably should never have been | ||
+ | shipped in the first | ||
+ | place as there edge parts are usually discarded. | ||
+ | 6) During the attenuation measurement the paper is completely removed | ||
+ | from the paddle | ||
+ | as the glue of the paper destroys the internal reflection and | ||
+ | distorts the measurement. | ||
+ | 7) Chuck is working on the TOF-frame design but is not yet finished. | ||
+ | 8) the Mini-TOF stand is still assembled as it is still in used as show | ||
+ | and tell object for the | ||
+ | FSU administration. |
Revision as of 15:36, 12 April 2013
GlueX TOF Meeting
Thursday, April 11, 2013
10:00 am EDT
JLab: CEBAF Center, F326/327
Agenda
- Announcements
- Review of last TOF bi-weekly meeting
- Construction news
- Invoicing changes and status
- Installation plan and document
Communication
Videoconference
- ESNet: 8542553
- SeeVogh:
- SeeVogh site
- Direct meeting link
- Phone Bridge ID: 15 5564
Desktop Sharing
- Go to http://esnet.readytalk.com
- In the "join a meeting" box enter the Hall D code: 3421244
- Fill in the participant registration form.
Slides
Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2013-2Q
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2013-2Q/ .
Minutes
Present:
- FIU: Sasha Ostrovidov
- JLab: Chuck Hutton, Beni Zihlmann (chair)
- first 5 production paddles have light guides glued to them and are now in the wrapping room for wrapping.
2) the wrapping procedure has been changed slightly such that the light guide
is wrapped with a separate independent piece of reflective material
that is
templated to fit the light guide better. A small strip of aluminium
foils is used
at the intersection between the scintillator and the light guide.
3) currently Paul Eugenio is doing the wrapping. He has not yet trained students
to do the job. And because he is currently at the APS meeting the
wrapping is
on hold.
4) Maurizio is polishing the light guides. 70 LG have been already polished. 5) 10 out of the 92 production bars have been measured in the dark box using
UV led to determine the attenuation length. It was found that one
paddle had
a very small attenuation length. After contacting ELJEN the
manufacturer agreed
to send them a new paddle. According to them it could be that this
paddle came
from the edge of a batch and probably should never have been
shipped in the first
place as there edge parts are usually discarded.
6) During the attenuation measurement the paper is completely removed from the paddle
as the glue of the paper destroys the internal reflection and
distorts the measurement. 7) Chuck is working on the TOF-frame design but is not yet finished. 8) the Mini-TOF stand is still assembled as it is still in used as show and tell object for the
FSU administration.