Dec 6, 2011 Calorimetry

Teleconference Time: 11:00 a.m. EST'

• ESNET (Number is 8542553) and EVO session (GlueX Calorimetry meeting room)
• JLab Phone: in CC F326 is 757-269-6337; JLab Phone in CC L207 is 757-269-7084
• Athens Phone: in Christina's office is 011-30-210-727-6947
• Regina Phone: in LB228 is 306-585-4204
• Phone connection only upon request.
  • +1-866-740-1260 : US+Canada
  • +1-303-248-0285 : International
  • then enter participant code: 3421244# (remember the "#").
  • or www.readytalk.com (and code without the #)

Items for followup from previous meeting(s)

1. Monitoring
   • Send additional SiPMs to Athens for tests (Elton)
   • Measure stability of light intensity as a function of time. Measurement in progress, will report at a later meeting.
   • Jlab to generate a drawing of the plexiglass sheet to be used in next batch of tests.
   • Specify/clarify requirement for monitoring light uniformity into the Pb glass (Matt)
2. FCAL
   • Send IU the drawings for the FCAL welded frame. (Tim)

Tentative Agenda

1. Announcements
2. Review of Action Items
3. Monitoring.
4. Beam tests in Hall B (fall 2011) (John)
5. FCAL
   1. Construction Status: mechanical, bases (notes from Matt)
6. BCAL
   1. Construction Status: builds, mini module
   2. Fibres
7. USM update
8. Readiness Review: Testing of light sensors for Bcal
9. Simulations/Reconstruction: Standalone MC, leakage at 12 degrees
10. Any other business

Minutes

Attending: Zisis, George, Andrei (UofR); Alam, Ricardo (USM); Christina, George, Pavlos (Athens); Elton, David, Yi, John D., Eugene, John L. (Jlab); Matt, Kei (IU);

1. Announcements
2. Review of Action Items
3. Monitoring.
   • Action items need to be acted on. Elton will check up on drawing for plexiglass.
   • Matt checked work by Claire Tarbert. GlueX document assumes that input monitoring constants are determined to +/- 20%. Suggest illumination uniformity of plane to be within +/-20% of mean.
   • Mail exchanges with Kappos, promised delivery of design by mid Jan for Jlab approval.
   • George: Intensity test are ongoing to determine stability of system. Will report at a later meeting.
4. Beam tests in Hall B (fall 2011) (John)
   • Collecting data for several weeks
   • Daq issues found and resolved.
   • Aligning detector using coincidences of trigger counters. Finding alignment such that there is uniform distribution around triggered counter
   • Gain balancing is under way
   • Dave Lawrence is taking advantage of the beam test to develop some online tools for viewing the data
   • One base is acting up and is under investigation
   • Data is being logged onto the elog hdfcaltest
5. FCAL
   1. Construction Status: mechanical, bases (notes from Matt)
   • Received the second batch of 100 boards. 10 had soldering/cleaning problems.
   • Continue to assess the pmts
6. BCAL
   1. Construction Status: builds, mini module
      • Last Bcal modules arrived intact this morning. Modules 45-49 + mini-Bcal
      • The support frame for the mini-Bcal was also included. A manual is available at a time that the detector will be assembled
   2. Fibres
      • All fibers have been measured.
      • Evaluation is not yet complete, but will be summarized into a final report
      • There is left over lead and fibers (approx. 10,000 fibers)
      • Spectral analysis of one fiber from each of the batches has been taken at various positions along the fiber for reference
   3. Celebration event
      • Date is not yet final 27 or 30 of Jan.
      • Claus is waiting to make travel arrangements.
7. USM update
   • PDE data is now appearing on web site
   • Data for testing the web interface is almost complete
   • There a still some mapping problems, which need to be resolved
   • Student is working on fitting data.
   • Yi took a first look at some spectra and finds some non-linearities between peaks
   • Decided to try to find a time on Friday to discuss the USM data
8. Readiness Review: Testing of light sensors for Bcal
9. Simulations/Reconstruction: Standalone MC, leakage at 12 degrees
   • Simulations have been completed at 12 degrees to cover the angular range on the Bcal
   • Leakage was studied out the front (albedo), back, sides and ends. Leakage was measured, and is about 8% at high energies.
   • Simulations were conducted for B=0.
10. Any other business