Find the minutes at
https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_12,_2012#Minutes
and below.
_____
GlueX TOF Meeting, April 12, 2012
Minutes
Present:
* FSU: Paul Eugenio, Sasha Ostrovidov, Randall Smith, Ian Winger
* JLab: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Tim
Whitlatch, Beni Zihlmann
Contract
Mark finally got the proposal materials from Procurement. He will be
sending it out to the Technical Review committee soon.
PMT Purchase
Procurement received a bid from a vendor. Evaluation is underway.
Calibration and Alignment
Sasha agreed to write something up about how we plan to calibrate the
TOF. Mark suggested with a wiki page outlining the ideas; essentially a
conceptual design of the calibration process. We will need something
like this before the Software Review in early June. A full GlueX note
should follow when plans are more detailed.
Technical Design Report Contribution
Paul agreed to look over what exists now and update the appropriate
section.
Mechanical Design
Tim and Chuck presented a [22]new idea for the mechanical support. The
new design was motivated by two requirements, (a) that we support the
light guides at some point close to the PMT's and (b) that we not put
pressure on the scintillator surfaces. This lead to a scheme where the
light guides are supported at two points, one near the joint with the
scintillator as in the previous design, but also with a collar just on
the in-board side of the steel magnetic shield.
Chuck will draw up another iteration of the concept and send it to the
FSU design team for their review and comments.
Once a design is agreed on, we will build a full-scale mock-up of the
center section of the array to test the ideas. The counter line-up will
be:
1. full
2. half-width
3. half-length
4. half-length
5. half-width
6. full
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References
22. https://halldweb1.jlab.org/talks/2012-2Q/tof_4_12_12.pptx
--
Mark M. Ito
Jefferson Lab (www.jlab.org)
(757)269-5295