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Agenda

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Attendees: Sasha,Jane,Phil,Jon,Liping,Zisis,Bill,Arshak,Tim B.,Olga,Susan,Igor

Latest ETA for SICCAS crystals is end of June
- Want to arrange Jane to do pre-selection of crystals
Expect delivery of first batch of 50 PMTs in 3 months, with monthly batches thereafter
- 11 months total for full set of 1000
Sasha ordered 1200 flanges, working on brazing procedure
- Not happy with consistency of quality of results
- Would prefer to outsource to company
Sasha described black box containing laser+optical bench for PMT testing
Sasha performed check of 30 modified dividers (intended for COMCAL)
- Some bases were not functional or had small pulse amplification, so looks like need to check all
- Saw 1-2% gain degradation at 15 microAmps anode current
  - Need to keep anode current small to extend lifetime
  - High current leads to gain variation
PMT divider design for FCAL-2 still in the works; waiting for version from Fernando
- Zisis' group can look at replacing amplifier with simplified circuit in parallel
- Zisis can do tests when new design from Fernando becomes available
Azizah (U. Regina) will redo Indiana U.'s TMVA-based neural network study of FCAL, then try with FCAL-2
- Planned comparison of default vs island cluster algorithms