Oct 7, 2010 Readout

Teleconference Time: 11:00 a.m. EST

• ESNET and EVO session
• Phone in CC L207 is 757-269-7084
• Phone:
  • +1-800-377-8846 : US
  • +1-888-276-7715 : Canada
  • +1-302-709-8424 : International
  • then enter participant code: 77438230# (remember the "#"). Phone connection only upon request.

Items for followup from previous meeting

1. Collect this information of testing (including goals and setup) on the wiki for ease of presenting information. (USM)

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Update - USM
4. SiPM Radiation Hardness Test (Update from Yi)
5. Electronics/cooling
6. Geometry and light guides
7. Simulation runs

Minutes

Attendees: Eugene, Fernando, Beni, Yi, John (Jlab), Zisis (Regina)

1. Announcements: none
2. Review of Action Items: USM was not online today. A new item has been added, concerning a NIM article on SiPM radiation hardness.
3. Update - USM
4. SiPM Radiation Hardness Test (Update from Yi)
   • The decision to proceed with SiPMs was taken in yesterday's Hall-D meeting. Glen Young has been informed, but the decision has yet not been communicated higher up. We have used up one month from our float and need to proceed to procurement soon.
   • Sasha found a paper that showed measurements of after pulsing down to 100 K, of the order of a few percent. Neither Carl nor Yi have seen anything noticeable, but Yi will look at it more closely and examine the pulse shape at room temperature and also at 0 C. Hamamatsu puts a strict range on Vop, in order to minimize this effect.
5. Electronics/cooling:
   • As soon as the SiPM decision is official, Fernando will get the BCAL CAD file from Chuck, import it into his CAD system and start working on dimensional details for electronics and cooling.
6. Geometry and light guides
7. Simulation runs: no report.