Jun 28, 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)

Items for followup from previous meeting

1. Chile will ship out 2 light guides as soon as possible to Athens for testing. (Will) Ready to ship.

Tentative Agenda

1. Announcements
2. Review of Action Items
3. USM Update
4. SiPM update
5. Electrical/cooling (Elton)
6. Geometry and light guides
   • Acceptance Studies for the Production Light Guides of the BCAL
7. Simulations

Minutes

Attending: John, Yi, Elton (JLab); Christine, George, Pavlos, Stratos (Athens); Zisis, Andrei (UofR); Will, Serguei, Alam (USM)

1. Announcements
2. Review of Action Items
3. Athens Update
   1. Athens has asked Zisis to order and ship them some LEDs, which they are having trouble obtaining. Zisis agreed. These will be used on the new cards for testing
   2. light_through_cal.pdf
      • "Well" hole (4mm diameter, 3mm deep) made perpendicular to Winston cone surface with a slow speed drill to prevent damage due to overheating
      • LED placed in well optically coupled through air with its axis aligned with that of the light guide.
      • Results obtained earlier showed a far/near ratio of about 3 with blue LED.
      • New results using a green LED. Ratio obtained is about 2.5. George thinks the difference is due to setup, not color of LED, but will check
      • The concept is to mount the LED on reverse side of board, so that the board can lay flat on the light guide and the LED point toward the opposite pmt.
      • The well concept with 'old' trapezoid light guides will be tested shortly.
      • Discussion followed on how to wrap the light guides and attach the LED boards.
   3. Request for proposals
      • Proposal is due on July 5, Christine believes she will need an extension. Elton suggested she request an extension to have sufficient time to produce a credible proposal.
4. USM Update
5. SiPM update
6. Electrical/cooling (Elton)
7. Geometry and light guides
   • Acceptance Studies for the Production Light Guides of the BCAL
8. Simulations