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

[whitey at jlab.org]

A comment on the shielding for the PMT's. The steel tube planned can
probably be thinner. We can layout the geometry and probably reduce the
needed width below 8cm.

Tim

> 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
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