Aug 23, 2011 Readout

Teleconference Time: 11:00 a.m. EST

• ESNET 8542553 and EVO session
• JLab Phone: in CC F326 is 757-269-6337 (usual room)
• JLab Phone in CC L207 is 757-269-7084
• Phone in the Regina Videoconference Suite is 306-585-4204
• Athens Phone: in Christina's office is 011-30-210-727-6947
• Phone:
  • +1-866-740-1260 : US and Canada
  • +1-303-248-0285 : International
  • then use participant code: 3421244# (the # is needed when using the phone)
  • OR from www.readytalk.com type access code 3421244 into "join a meeting" without the # (you need java plugin)

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Monitoring Update (Athens)
4. USM Update
   1. MPPC dark box test station: database and interface (Ricardo Oyarzun and Hayk Hakobyan) Link here
   2. MPPC dark box test station: hardware update (Alam Toro and Sergey Kuleshov) Link here
5. SiPM update
6. Electrical/cooling (Elton)
7. Geometry and light guides
8. Simulations

Minutes

Attending: Elton, Will, Beni, Eugene (JLab); Christine (UA); Sergey (CERN); Hayk, Alam, Ricardo (USM); Andrei (UofR).

1. Announcements
2. Review of Action Items
3. Monitoring Update (Athens)
   1. George Voulgaris reported on studies on new OSRAM LEDs before he left on vacation
      • They measured various among the samples studied, and suggest to go back to the Kingbright LEDs for the monitoring system.
      • The Kingbright LEDs havea 3.2x1.6 mm2 footprint and the light is emitted vertical to the plane. Therefore, they might require (hand) soldering at an angle.
   2. Christine, Elton and Zisis will have phone conference on Thu at 9:30 to go over questions about the contract
4. USM Update
   1. MPPC dark box test station: database and interface (Ricardo Oyarzun and Hayk Hakobyan) Link here
      • QA, testing, user interface to MySql data base to hold SiPM data from the three SiPM test stations.
      • Elton: What information is kept in the data base? They will be parameters of interest and give specific list at the next meeting.
      • Web server is currently run on a local machine, but can be made available on the web at a later time
   2. MPPC dark box test station: hardware update (Alam Toro and Sergey Kuleshov) Link here
      • 10 big boards and 70 daughter boards have been received. They have not yet been stuffed with components, which will take several more weeks.
      • New boards have added daughter boards for modularity and to reduce complexity, as the mux are moved to the daughters.
      • Testing is proceeding using the old boards.
      • Checked pedestal widths for different grounding configurations. The width does seem to change, although additional grounding straps seem to degrade the peaks.
      • Beni: suggested to float the power supply and only use the signal ground connection.
      • Beni: Suggested to drill holes at the corners of the boards and use with stand-offs
5. SiPM update
   1. First Hamamatsu delivery expected for beginning of Sep.
6. Electrical/cooling (Elton)
   1. Major design decision is whether to proceed with an additional inner layer (e.g. the 1-2-3-4 configuration). Fernando is investigating the options of laying this out on his preamp/sum board.
   2. Mechanical pieces that do not depend on this decision will go out for fabrication.
7. Geometry and light guides
   1. JLab RFP was issued last week. Expect responses in a few weeks
   2. The light guide production at USM had started and they had 30 guides machined, but unpolished
      • Athens would like about 20 guides to assemble into two columns. These light guides are of the old design.
      • Alam will check the status of polishing and see if they can be provided to Athens for testing monitoring system with more realistic configurations.
8. Simulations