June 25, 2009 Calorimetry
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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 "#")
Contents
Items for followup from previous meeting(s)
- Resolution studies
- Study impact of inactive material at the end of BCAL on acceptance.
- Documentation on fiber first-article
- Review calibration procedures
- Update cost estimates
- light guides (USM)
- temperature stabilization (Tim and Fernando)
- summing circuits for SiPMs (Fernando)
- Impact of gain variations on resolution (especially for summed SiPMs) (Elton)
Documents to Review
Tentative Agenda
- Announcements
- Review of Action Items
- Calibration (George Voulgaris): Summary
- 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
- FCAL Update
- MOU, sow (Elton, Matt)
- Simulations (Sasha)
- Backgrounds from Cerenkov light
- Acceptance loss due to light guides
- BCAL Readout
- Update from USM (Will)
- Cost comparisons (Elton)
- Discussion of Bcal Readout Review (July 21)
- Stefano Miscetti can participate in the review via video. A test of ESNET connection yesterday was very successful.
- Other reviewers? (Stepan Stepanyan and Howard Fenker ?)
- Tentative AgendaTopics
- Status/overview of Bcal construction, geometry - Eugene/George/Zisis
- Calorimeter requirements and resolution - Elton
- readout specifications
- number of p.e.
- light collection
- dark rate
- dynamic range
- gain
- calibration
- Status of sensor development (Carl)
- SensL SiPM
- Hamamatsu SiPM
- Fine mesh PMTs
- Electrical requirements - Fernando
- readout granularity
- discrimination
- FADCs, TDCs
- Simulations - Sasha
- Backgrounds
- Acceptance gap bcal-fcal
- gain stabilization / cooling
- Infrastructure/production at USM? - Will
- Cost and Schedule - Eugene/Elton
Minutes
Attendees: