Dec 6, 2011 Calorimetry
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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)
- 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)
- FCAL
- Send IU the drawings for the FCAL welded frame. (Tim)
Tentative Agenda
- Announcements
- Review of Action Items
- Monitoring.
- Beam tests in Hall B (fall 2011) (John)
- FCAL
- Construction Status: mechanical, bases (notes from Matt)
- BCAL
- Construction Status: builds, mini module
- Fibres
- USM update
- Readiness Review: Testing of light sensors for Bcal
- Simulations/Reconstruction: Standalone MC, leakage at 12 degrees
- 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);
- Announcements
- Review of Action Items
- 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.
- 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
- FCAL
- Construction Status: mechanical, bases (notes from Matt)
- Received the second batch of 100 boards. 10 had soldering/cleaning problems.
- Continue to assess the pmts
- BCAL
- 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
- 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
- Celebration event
- Date is not yet final 27 or 30 of Jan.
- Claus is waiting to make travel arrangements.
- Construction Status: builds, mini module
- 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
- Readiness Review: Testing of light sensors for Bcal
- 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.
- Any other business