Difference between revisions of "JEF meeting, April 15, 2022"
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*** Crystal wrapping is very slow, only about 15 crystals have been wrapped during this week. | *** Crystal wrapping is very slow, only about 15 crystals have been wrapped during this week. | ||
** Production of Silicon cookies at the GWU [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_8_22/image_50394113.JPG]. See Olga's report. Contract with the GWU is under preparation. | ** Production of Silicon cookies at the GWU [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_8_22/image_50394113.JPG]. See Olga's report. Contract with the GWU is under preparation. | ||
− | ** Igal: continues wrapping | + | ** Igal: continues wrapping ESR for crystals and Tedlar |
** Procurement of spare PMTs and sockets: no price increase [https://halldweb.jlab.org/detectors/fcal2/pmt/4125_quotes_fcal_04_06_22.pdf]. Submitted PR for 100 PMTs and 200 sockets; not clear when it will be signed. | ** Procurement of spare PMTs and sockets: no price increase [https://halldweb.jlab.org/detectors/fcal2/pmt/4125_quotes_fcal_04_06_22.pdf]. Submitted PR for 100 PMTs and 200 sockets; not clear when it will be signed. | ||
− | |||
* Module fabrication -- Sasha | * Module fabrication -- Sasha | ||
+ | **[https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf Modules fabricated by Arshak and Sasha] [https://docs.google.com/document/d/1upI9M_RNR4qipzwg-SmxmzkqoCDU294x7Y3jT5M6DVY/edit (list on Google Drive)] (grand total 290) | ||
+ | ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_8_22/modules_in_tedf_4_8_22.jpg Fabricated modules in TEDF ] | ||
+ | ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf Status of fabrication ] | ||
+ | * Cable distribution of the FCAL insert -- Sasha | ||
+ | ** Connection of LV cables to the PMT base [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_15_22/lv_cables.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_15_22/lv_cables2.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/4_15_22/lv_cables1.jpg] | ||
+ | ** [https://halldweb.jlab.org/wiki/images/d/d3/FCAL2_Readout_Layout.pdf Draft of the cable distribution in the FCAL dark room] (meeting with Fernando and Tim) | ||
+ | ** Submitted PR for procurement of LEMO (signal) connectors (Chris and Fernando) | ||
* Light Monitoring System -- Arshak | * Light Monitoring System -- Arshak | ||
**https://halldweb.jlab.org/DocDB/0055/005557/001/lms_update_04_14_22.pdf | **https://halldweb.jlab.org/DocDB/0055/005557/001/lms_update_04_14_22.pdf | ||
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* Simulations | * Simulations | ||
** [[Plots for informal island algorithm discussion]] -- Simon | ** [[Plots for informal island algorithm discussion]] -- Simon | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Bill, Zisis, Sasha, Olga, Igal, Liping, Arshak, Tegan, Jon, Susan, Tim B., Tim W., Jane, S.T. | ||
+ | * Situation for students coming to JLab in the summer is becoming clearer | ||
+ | ** Lab is able to pay for lodging and per diem, maybe transportation | ||
+ | ** Phil will send 2 students, GWU has 3 students + 1 from community college, Liping looking at applications from 4 students, 2 students from URegina possible | ||
+ | ** Most pressing task is crystal wrapping; Sasha could also have students work on tagger hodoscope repairs or COMCAL refurbishment | ||
+ | * Since we are using 16 ESR jigs borrowed from NPS, we agreed to produce foils for NPS as their fabrication ramps up | ||
+ | * GWU working on silicon cookies -- currently done by Olga, but soon a student will be doing this | ||
+ | * FCAL2 module count now up to 290 | ||
+ | * Discussions with Tim W. and Fernando regarding cabling in the dark room taking place | ||
+ | ** Space for low voltage cables tight but seems manageable | ||
+ | ** Need to pay attention to strain relief and ease of access | ||
+ | ** Made 4x4 array to test cabling | ||
+ | * Arshak continues to work on LMS development | ||
+ | ** Plexiglas delivered from machine shop attenuates injected light to much -- Arsak ordered new cast acrylic plate from outside vendor | ||
+ | ** Some LEDs arrived but integrating sphere is going through procurement process | ||
+ | ** Looking at using connectors for light injection as opposed to gluing fibers directly to plastic sheet | ||
+ | *** 3D printed vs commercial connectors? | ||
+ | ** How to hold in place in front of insert? Discussed angle holders on 4 sides | ||
+ | ** 4-piece plexiglas in front of existing FCAL needs to be modified | ||
+ | * After the meeting we discussed the state of the island algorithm reconstruction and the isolation of the η→π0γγ channel | ||
+ | ** Simon's results don't completely agree with things seen by other people -- not clear tweaking parameters helps in the final analysis | ||
+ | ** TOF veto is important, but backsplash from showers from photons in the FCAL could be a problem |
Latest revision as of 08:01, 18 April 2022
Meeting time and location=
- 9:30 am EST (JLab time) remote only
- Zoom meeting ID: 161 050 9142 Passcode: 004965
Agenda
- Preparation for mass production of FCAL2 modules -- Sasha
- Getting summer students involved in the project. Vaccinated students will be permitted to the lab according to the communication with Brian Hanlon (still to be checked). Not a problem to get 5 - 6 students involved (List of possible tasks).
- Chris continues brazing brass straps. The quality has been improved. We have many brass assemblies now.
- DSG:
- About 700 ESR foils (SICCAS) have been preshaped. Start preshaping foils for CRYTUR crystals (after 900 foils for SICCAS are produced). Need new cutting template.
- Crystal wrapping is very slow, only about 15 crystals have been wrapped during this week.
- Production of Silicon cookies at the GWU [1]. See Olga's report. Contract with the GWU is under preparation.
- Igal: continues wrapping ESR for crystals and Tedlar
- Procurement of spare PMTs and sockets: no price increase [2]. Submitted PR for 100 PMTs and 200 sockets; not clear when it will be signed.
- Module fabrication -- Sasha
- Cable distribution of the FCAL insert -- Sasha
- Connection of LV cables to the PMT base [3][4][5]
- Draft of the cable distribution in the FCAL dark room (meeting with Fernando and Tim)
- Submitted PR for procurement of LEMO (signal) connectors (Chris and Fernando)
- Light Monitoring System -- Arshak
- COMCAL tests, TAC running, etc. -- Sasha
- Data analysis
- Simulations
Minutes
Attendees: Bill, Zisis, Sasha, Olga, Igal, Liping, Arshak, Tegan, Jon, Susan, Tim B., Tim W., Jane, S.T.
- Situation for students coming to JLab in the summer is becoming clearer
- Lab is able to pay for lodging and per diem, maybe transportation
- Phil will send 2 students, GWU has 3 students + 1 from community college, Liping looking at applications from 4 students, 2 students from URegina possible
- Most pressing task is crystal wrapping; Sasha could also have students work on tagger hodoscope repairs or COMCAL refurbishment
- Since we are using 16 ESR jigs borrowed from NPS, we agreed to produce foils for NPS as their fabrication ramps up
- GWU working on silicon cookies -- currently done by Olga, but soon a student will be doing this
- FCAL2 module count now up to 290
- Discussions with Tim W. and Fernando regarding cabling in the dark room taking place
- Space for low voltage cables tight but seems manageable
- Need to pay attention to strain relief and ease of access
- Made 4x4 array to test cabling
- Arshak continues to work on LMS development
- Plexiglas delivered from machine shop attenuates injected light to much -- Arsak ordered new cast acrylic plate from outside vendor
- Some LEDs arrived but integrating sphere is going through procurement process
- Looking at using connectors for light injection as opposed to gluing fibers directly to plastic sheet
- 3D printed vs commercial connectors?
- How to hold in place in front of insert? Discussed angle holders on 4 sides
- 4-piece plexiglas in front of existing FCAL needs to be modified
- After the meeting we discussed the state of the island algorithm reconstruction and the isolation of the η→π0γγ channel
- Simon's results don't completely agree with things seen by other people -- not clear tweaking parameters helps in the final analysis
- TOF veto is important, but backsplash from showers from photons in the FCAL could be a problem