Apr 23, 2009 Readout

Teleconference Time: 11:00 a.m. EST

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Items for followup from previous meeting

1. Timeline for producing a concept for FM light collection
2. Elton will send the Regina MOU to Will
3. Will requested that Elton start a schedule in FastTrack to start specific discussions on timelines and milestones
4. Review literature on cooling
5. Hand sketches on the board produced a concept, which Tim will draw up for further discussions.
6. Tim agreed to do "excel calculation" of heat transfer including time to cooldown for this concept.

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Review timeline
   • Materials for prototyping
4. MOU with USM

Minutes

1. Announcements
   • New student (Eduardo Mora) will dedicate his thesis work to study of light collection for the FM pmt option.
   • Hamamatsu representatives met with JLab staff on Tuesday primarily to SiPMs. Elton will circulate meeting notes shortly.
2. Review of Action Items
   • All issues have been addressed since the last meeting.
   • Elton sent a draft schedule to Will, and a revised schedule was returned back today just before the meeting.
3. Review timeline
   • New draft divides project into design, prototyping and management.
   • Conceptual design completed by end of June
   • Prototyping materials to be purchased starting now, so that fabrication can start in mid June, with measurements in July.
4. Materials for prototyping
   1. A preliminary list of materials is on the schedule, but some lead times are long
   2. Source for testing
      • Likely a UV source to stimulate scintillators
      • An "uncomfortably hot" radioactive source is also available.
   3. Scintillation material
      • Bcal slice (20 cm "long", with a cross sectional area of about 5 x 5 cm2 to cover the largest segment (See Alternative readout#Cathode coverage using fine-mesh pmts).
      • Zisis will get a quote from Ross machining to find out how much it would cost to polish a segment (both ends).
      • Will will send a shipping address.
      • Single fibers can also be used. We might be able to provide some number of cut SCSN-78 fibers to make into Al (or some other material) matrix. For a 2x2 cm2 section (inner segment), we would need about 250 fibers. For a 5x5 section (outer segment) we would need about 1600. Plenty of fibers (of say 20 cm lengths) would be available once production starts. In the meantime, JLab will see how many fibers might be provided for this activity.
   4. Light detector
      • Availability of FM pmts? (Elton will ask Hamamatsu). Werner (Athens?) also has at least one FM pmt which might be able to be loaned. Elton will also inquire about "green sensitive" FM pmts.
5. MOU with USM
   • Not much progress specifically on the MOU. USM grant is for a "Center of Science and Technology". Current effort is directed at defining the organizational structure, and intellectual property rights will be a topic for clarification, especially since one of the Center's goals will be to promote commercial applications of technology.