Apr 2, 2009 Calorimetry
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Teleconference Time: 4:45 p.m. EST
- 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
- Resolution studies (Blake)
- Develop criteria for evaluating resolution studies
- Study impact of inactive material at the end of BCAL on acceptance.
- Check what configuration (thresholds, step sizes, stack? parameters for secondaries, etc) is being used for the Hall D simulations (Regina)
- Review options for import/export to Chile (loans, donations, transfers, etc.)
- From stand-alone MC, or previous notes, collect the distribution of photons expected for numbers of photons for various showers (especially at low energies, e.g. 50 MeV - 200 MeV) and typicall positions (i.e angles) along the calorimeter. (Andrei).
- JLab to have some informal discussions on various cooling concepts to be presented at the next meeting.[http://www.jlab.org/~huttonc/siPM_layout.ppt cooling}
Documents to Review
- Fiber Summaries (JLab)
- Fiber Measurements
- Simulation of BCAL Threshold GlueX-doc-1231
Tentative Agenda
- Announcements
- FCAL Update
- Simulations
- Simulation of BCAL Threshold: GlueX-doc-1231 (Matt)
- BCAL Dark Hits (Matt)
- BCAL Update
- Preparations for construction
- Results of Fiber Tests
- Kuraray Fibre Tests - Regina - updated (Blake)
- Kuraray No of pe - April 2, 2009 - updated (Andrei, Kathryn)
- Cooling of BCAL Readout
- Review of Action Items
Minutes
- Announcements
- Cooling of BCAL Readout [moved forward due to accomodate Tim's schedule]
- Tim presented a preliminary concept for cooling the SiPMs GlueX-doc-1233 DRAFT Cooling Concept
- Based on JLab informal discussions.
- Idea is to directly cool the sensor via Peltiers to 5deg C with a cooling circuit at room temperature remove the heat generated by Peltier (~1.5 Watt/channel).
- SiPM geometry based on SensL ceramic design which allows cooling sensor directly by offsetting electronics via long pins.
- Peltier junction and sensor would be potted to prevent condensation on sensor. Needed is potting to have sufficient insulation to confine cold area.
- Should provide a concrete basis for further discussion.
- Matt: Mentioned that CLEO had good success with the following scheme for cooling their drift chamber electronics: Fill space with (dry) N2. Use polyethelne tubing with cooling liquid (PF200) to cool N2. System was robust and inexpensive.
- FCAL Update
- Simulations
- Simulation of BCAL Threshold: GlueX-doc-1231 (Matt)
- BCAL Dark Hits (Matt)
- BCAL Update
- Preparations for construction
- Results of Fiber Tests
- Kuraray Fibre Tests - Regina - updated (Blake)
- Kuraray No of pe - April 2, 2009 - updated (Andrei, Kathryn)
- Review of Action Items