May 27, 2010 Calorimetry

Teleconference Time: 11:00 a.m. EDT

• ESNET and EVO session
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Items for followup from previous meeting(s)

1. Monitoring
   • Bcal: Testing to see if LED sources can be viewed by pmts on both sides of the module (UofR/UofA).
2. Fcal
   • Draft agenda for Readiness Review (Elton and Matt)
   • Decision on rad hard detectors
3. Bcal
   • Send copy of contract with Ross to JLab
   • Report on beam test data at small incidence angles. Ongoing work.

Discussion of Options for Radiation-Hard Insert

Options for Radiation-Hard Insert

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Calibration/Monitoring (Zisis)
4. FCAL
   1. Construction status
   2. FCAL Fabrication Readiness Review
   3. To shashlyk or not to shashlyk. Options (Elton) see Table. Physics Impact, see GlueX-doc-1481
   4. PbWO Insertion. (Ashot) . see [1]
5. BCAL
   1. Calorimeter input to PAC (Zisis)
   2. Construction Status
   3. Lead: 6th order of 13cm-wide sheets
   4. Fibres: Media:FibresAttenLenShips1-12.png
   5. Npe corrected numbers: Media:ZoomedPage31.png and Media:ZoomedPage38.png
   6. USM MPPC test stand design update
6. Simulations
7. Other Updates

Minutes

Attendees:

1. Announcements
   • USM MOU has been finalized. Document will be sent to Will to start collecting signatures.
2. Review of Action Items
   • Athens has received two Winston Cones for testing of calibration sources.
   • Stamatis is working on this data as part of his master's thesis. Will report soon on results.
3. Calibration/Monitoring (Zisis, George)
4. FCAL
   1. Construction status
      • New tech, Steve, started 3 weeks ago. Waiting for parts (face plates and jack plates) to start work. Delay due to getting purchase out. Company is now starting to produce pieces, which can be delivered in smal batches to allow assembly work to proceed.
   2. Electronic bases
      • 3 out of 4 boards working just fine.
      • Problem with multiplier board. Sparking causing failures. Problem traced to spacing between components. Potting the board with epoxy fixed problem.
      • Plan is to make another layout of the board with increased spacing, and try to avoid potting. If potting is unavoidable, will only pot with epoxy sensitive areas for access to most of the components on the board.
      • Shipped 16 Fcal cables to Fernando for evaluation of fire rating.
      • Plan to send the Fcal time NIM article out tomorrow.
   3. FCAL Fabrication Readiness Review
      • Confirmed June 23-24 as dates for Readiness Review
      • Electronics review will be delayed till new layout is complete and under test. This will likely be 30-45 days.

1. BCAL
   1. Calorimeter input to PAC (Zisis)
   2. Construction Status
   3. Lead: 6th order of 13cm-wide sheets
   4. Fibres: Media:FibresAttenLenShips1-12.png
   5. Npe corrected numbers: Media:ZoomedPage31.png and Media:ZoomedPage38.png
   6. USM MPPC test stand design update
2. Discussion of Fcal Insert
   1. To shashlyk or not to shashlyk. Options (Elton) see Table. Physics Impact, see GlueX-doc-1481
   2. PbWO Insertion. (Ashot). See [2]
3. Simulations

Elton and Fernando: I corrected the dynamic range of BCAL according to Irina's results (from gluex-doc-1474 note). The attachment contains "zoomed" plots from the note pages 31 and 38 (for easy reading of the spectra edges). Please use the corrected numbers for your references in the future. Thank you, Andrei ********************************************************************** All Data from GlueX-doc-1474 Shower Upstream Fig Downstream Fig Eg (GeV) Theta Phi Sum Npe Npe 0.06 105 gap Inner-3 120 30 50 31(zoom) 0.06 105 gap Inner-1 90 38 40 38(zoom) 2.5 12 center Inner-3 7500 15 17000 14 2.5 12 center Inner-1 5500 34 13000 33 Ratio (dynamic range) 62.5 340 61 325

1. Other Updates