July 9, 2009 Calorimetry

Teleconference Time: 11:00 a.m. EST

• EVO session
• Phone:
  • +1-800-377-8846 : US
  • +1-888-276-7715 : Canada
  • +1-302-709-8424 : International
  • then enter participant code: 39527048# (remember the "#")

Items for followup from previous meeting(s)

1. Resolution studies
   • Study impact of inactive material at the end of BCAL on acceptance.
2. Documentation on fiber first-article
3. Review calibration procedures
4. Update cost estimates
   • light guides (USM)
   • temperature stabilization (Tim and Fernando)
   • summing circuits for SiPMs (Fernando)
5. Impact of gain variations on resolution (especially for summed SiPMs) (Elton)

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Calibration (George Voulgaris): Summary
4. BCAL Fabrication (Zisis)
   • Contract status
   • Construction prototype update
   • Results from First Shipment of Production Fibers
     • Method: fiber in track, both ends polished, far end blackened, near end coupled to Hamamatsu S2281 photodiode, read out via a picoammeter
     • Sample exponential fits: Media:JS008graphs.png
     • Attenuation Length by Lot Number: Media:FiberShip01.png
     • Attenuation Length for all fibers (151 tested to date): Media:cummulativehist.png
5. FCAL Update
   • MOU, sow (Elton, Matt)
6. Simulations (Sasha)
   • Backgrounds from Cerenkov light
   • Acceptance loss due to light guides
7. BCAL Readout
   1. Update from USM (Will)
   2. Cost comparisons (Elton)
   3. Discussion of Bcal Readout Review (July 21)
      1. Stefano Miscetti can participate in the review via video. A test of ESNET connection yesterday was very successful.
      2. Other reviewers? (Stepan Stepanyan and Howard Fenker ?)
      3. Tentative schedule: July 10: pre-brief material, July 16: slides for presentations.
      4. Tentative Agenda Topics: BCAL Readout Review
8. Other business

Minutes

Attendees: