[Halld-pid] Minutes, GlueX TOF Meeting, Fri. Jan 21 '11

[Mark M. Ito]

Find the minutes at 
http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_TOF_Meeting%2C_January_21%2C_2011#Minutes 
and as text below.

==

GlueX TOF Meeting, January 21, 2011
Minutes

Present:
* FSU: Sasha Ostrovidov
* JLab: Hovanes Egiyan, Mark Ito (chair), Yi Qiang, Sascha Somov,
Simon Taylor, Beni Zihlmann


Status of the Prototype

* Mark needs to check on getting a crate for FSU.
* Paul has been thinking of a different geometry for the TOF, to aid
mechanical construction and support. The principal change would be
to go from 6 cm wide counters to 8 cm. This would allow all of the
phototubes to lie on the same plane; in the 6 cm design, the
μ-metal shield would cause interference if the tubes were
co-planar. Space between the tubes be used for a support structure.
Some implications:
1. The beam hole bigger would be bigger.
2. The double-hit probability would be higher.
3. The rate on the inner counters might increase (or decrease).
4. We would likely lose light with a wider paddle.
+ Sasha O. is running Monte Carlo to study the effect.
* FSU is exploring getting equipment to use UV-curing glue, as
suggested by Beni at the last meeting. They have been talking to
the Detector Meisters (Brian Cross and Carl Zorn) and folks in Hall
C on their experience. A system would cost a few thousand dollars.
+ JLab, groups, several K$
+ Brian and Carl, Hall C group
* The prototype is taking data. The data has not been analyzed
completely yet. There are some mysteries that Sasha is working to
understand.
* A Hamamatsu PMT was shipped to JLab from FSU. It should arrive
soon.


Status of the Contract

Mark showed [27]a wiki page listing items needed to put a construction
contract into place. Beni commented on his experience working on the
contract with CMU.

Retrieved from
"http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_TOF_Meeting%2C_January_21%2C_2011"

References

27. 
http://www.jlab.org/Hall-D/software/wiki/index.php/Private:Notes_on_the_TOF_Construction_Contract