Nov 1, 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)
   • Progress on BCAL monitoring, test a new type of LED
4. USM Update
   1. All cards and boards installed in 32-MPPC test setup
   2. Extensive troubleshooting of problems such as oscillations, was completed today
   3. Database for MPPC tests is now viewable on web at this link: http://atlasusr.fis.utfsm.cl:8000/
5. SiPM update
6. Electrical/cooling (Elton)
7. Geometry and light guides
8. Simulations
9. Other - poster photos?

Minutes

Attending: Elton, Yi, Tim, Beni (JLab); Zisis, Andrei (UofR); Will, Hayk, Ricardo, Alam (USM); Christina, George, Pavlos (Athens)

1. Announcements
2. Review of Action Items
3. Monitoring Update (Athens)
   1. Progress on BCAL monitoring, test a new type of LED
   2. Found new LED to be used for monitoring
      • Previous tests with Winston cones gave a ratio of Far/Near ~ 3.5
      • New tests with trapezoidal guides measured ratio F/N ~ 4.1 - 6.4
      • LEDs are non-focusing, so gluing or grease seems to increase collection.
      • Zisis: There seems to be sufficient light, so propose to place LED in hole without grease but secure the board to the light guide.
   3. Light guides from Chile have been processed though customs and checking with boards for space requirements. Will double check the space and position of the holes.
   4. Christina: request that we send them more SiPM for further detailed testing. They request 4-6. Elton said that sensors may not be the problem, but we need to check on availability of electronics.
4. USM Update
   1. Serguei and Alam have been working on installing all electronics (8 big boards, all daughter boards and connections) in the dark box.
      • Initial problems with readout and noise, but initial issues addressed. Added capacitors on bias lines and changed some connectors.
      • Writing data to dB with dummy data.
      • Web site is ready, but waiting on approvals by university to post to external networks.
   2. All cards and boards installed in 32-MPPC test setup
   3. Extensive troubleshooting of problems such as oscillations, was completed today
   4. Database for MPPC tests is now viewable on web at this link: http://atlasusr.fis.utfsm.cl:8000/
      • Reading and writing to the dB. Demonstrated the interface at the meeting from a local screen at USM.
      • Three stages (stations) of testing and each reflected in the interface to the dB: Receiving and inspection; PDE tests on reference samples; dark box and relative testing of all units.
      • Interface allows for entering information to be stored in dB, which can be used for setting bias, etc on subsequent tests. Temperatures will also be monitored.
      • Will start very shortly to test with real data.
      • Should have a release of software in a couple of weeks. Add Yi to the github? group for code management.
   5. Readiness Review. The schedule calls for the Readiness Review to be completed before Dec 15. USM is planning to complete this milestone according to schedule. It will need to be scheduled after the test station is tested with 32 sensors. There is some uncertainty regarding the expected delivery of the first shipment and Will will confirm delivery dates with Hamamatsu.
5. SiPM update
   1. Fourteen sample units have been tested in the single-test setup
   2. Electronic boards are under review and should be sent out soon
   3. Mechanical pieces are coming in
   4. Should have the test station operational in a couple of weeks.
6. Electrical/cooling (Elton)
   1. Electrical boards for production prototypes are in final design and review
   2. Mechanical parts are out for order
7. Geometry and light guides
   1. Order for light guides has been awarded to USM
   2. There is some trouble finding material with haze<1%. We can relax that requirement to <2% for these short light guides.
8. Simulations
   1. Weekly meetings, coordinated by David Lawrence is studying the issue of granularity. Meeting notes are available or those interested.
9. Other - poster photos?
   1. Zisis will have Dani take some high resolution photos of the final production, which could be used in PR.