Aug 2, 2011 Calorimetry
From GlueXWiki
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
- Zisis will remind George to send Christina some pricing information for testing of monitoring boards.
Tentative Agenda
- Announcements
- Review of Action Items
- Monitoring
- FCAL (notes from Matt)
- Construction Status: mechanical, bases
- BCAL
- Construction Status: builds, fibre QA
- Simulations
- Beam tests in Hall B (fall 2011)?pdf (Kei)
- Any other business
Minutes
Attending: Elton, Eugene,Tim,Beni,Lubomir (Jlab); Kei, Matt (IU); Andrei (UofR)
- Announcements
- Review of Action Items
- Monitoring
- Christine sent the response to the JLab RFP for the cal monitoring system on Friday.
- FCAL
- Started cutting metal for support frame in machine shop
- Procurement for 2500 bases proceeding well
- Expect first delivery at the end of the month
- Test stand for bases
- Kei is getting test stand up and running and reviewing proceedures
- PMTs were tested years ago, rechecking
- First verify procedures and compare to documentation
- Glue light guides to pmts, wrap and then test in groups of 30; archive test data
- Need to interface calibration sequences with slow control system
- May wish to bring this up at an online meeting to clarify guidelines
- Sent a CAEN-Ethernet and PS this week to Hovanes
- Interlock system for dark box
- Elton: Likely use the hardware interlock from power supplies.
- Lubomir: suggested to also monitor temperature and humidity and add to interlock
- Matt: May add this information to the CAEN controller, so that any trips can be diagnosed quickly.
- BCAL Progress
- Module 43 build will finish tomorrow; Module 44 build will finish on Friday; on schedule to complete 45 and 46 by August 31.
- Machining of Modules 37-40 is done. Inspection will take place tomorrow (Aug. 3) and pickup for the shipment is on August 5 with arrival at JLab on August 8.
- Fibre QA of shipment 46: nominal atten len, Npe=7.45 +/- 0.48.
- Fibre Shipment 27 arrived on July 29; crate was damaged, fibres boxes inside were ok.
- Simulations
- Beam tests in Hall B (fall 2011)?pdf (Kei)
- Considering using the tagger alcove with more space
- Elton: check the multiple scattering in the tagger counters and box
- Tentative size is 5x5 array. Lubomir mentioned that a 3x3 array is sufficient for energy measurement, a 5x5 useful for position measurements.
- Detector about 1 m long, 10lbs/block
- Eugene: noted that it is difficult to calibrate the edges of array. Will need to move the detector left/right for calibration
- Eugene: there is a counter of strips in Hall A that could be used to define the vertical position of impact. This is connected to a multi-anode pmt, which could be read out with the data.
- Accelerator schedule for 3/4/5 pass beam is Nov 19-Dec 22 and Jan 5-May 13.
- Next step is to develop a conceptual design for the support structure.
- Any other business
- Will Brooks sent a short progress report from USM:
- Making good progress toward light-based tests this week. Currently trying to reduce leakage currents on the boards, which are mounted in the dark box
- Expect a large shipment of the new-design boards next week.
- Will Brooks sent a short progress report from USM: