GlueX TOF Meeting, August 30, 2012
From GlueXWiki
GlueX TOF Meeting
Thursday, August 30, 2012
10:00 am EDT
JLab: CEBAF Center, F326
Contents
Agenda
- Announcements
- Review of last TOF bi-weekly meeting
- Mechanical design
- Prototype status
- TDC Purchase
- Contract Status
- Calibration and Alignment
- Technical Design Report contribution
Communication
Videoconference
- ESNet: 8542553
- EVO: EVO site
- meeting link
- Phone bridge ID: 13 7104
Slides
Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2012-3Q
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2012-3Q/ .
Minutes
Present:
- FSU: Paul Eugenio, Sasha Ostrovidov, Randall Smith, Ian Winger
- JLab: Fernando Barbosa, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann
Re-cap of Last Meeting
Paul summarized items discussed at the last meeting, on August 16.
- There was a short discussion of items purchased
- FSU gave an update on mini-TOF construction
- There was discussion of changing materials due to length and weight.
- Sasha presented ideas on calibration.
Electronics
TDC Purchase
Fernando reported.
- The TDCs have been ordered.
- Signal distribution issues need to be planned, in particular, additional modules need to be built by us. Hall B has prototypes of these boards but Sergey Boyarinov thinks a new design is needed.
Flash ADCs and the Prototype
Paul expressed interest in gaining experience with flash ADCs.
- FSU has a VME 64X crate with pins removed for to accomodate the serial connector on the Flash 250. With this set-up one must use the internal clock on the module or provide external clock signals. Since only one ADC is needed for this exercise, the internal clock should be fine.
- Fernando will look and see what is available.
- Production units will go to UMass in a month, he hopes that we can receive tested modules from UMass in late October. These will add to the supply.
Mini-TOF Update
Randall and Ian gave the update.
- The package of bent plates arrived from JLab, but some may not work. They were not stainless as expected. More individual plates may have to be made.
- They are making lightguides. The long versions have been made for the first time.
- PMT sleeves have been completed.
- Shield holders have been completed.
- Some more raw more materials are needed. Paul had transmitted the list to Mark. He will place the order.
- This afternoon Paul and Ian will meet to discuss the gluing fixture for assembling five paddles at once.
Contract Status
Calibration and Alignment
A new version of the calibration document will be distributed shortly.