Difference between revisions of "JEF meeting, February 3, 2023"

From GlueXWiki
Jump to: navigation, search
(Created page with "Meeting time and location: *9:30 am EST (JLab time) remote only *Zoom meeting ID: [https://jlab-org.zoomgov.com/j/1610509142?pwd=STNZUmNoMElqbHRVdjlVb0ZzR1piZz09 161 050 9142]...")
 
m (→‎Minutes)
 
(6 intermediate revisions by 3 users not shown)
Line 6: Line 6:
  
 
*'''Preparation of parts for FCAL2 modules''' -- Sasha  
 
*'''Preparation of parts for FCAL2 modules''' -- Sasha  
 +
** Received all 150 CRYTUR crystals from physics division (22-C0275) [https://halldweb.jlab.org/wiki/index.php/CRYTUR ]
 +
*** Expect to receive 95 more CRYTUR crystals in May (835 + 95 = 930 in total)
 +
**[https://halldweb.jlab.org/detectors/fcal2/module_fabrication/wrapped/wrapped_crytur.pdf Wrapped CRYTUR crystals: 835 (ALL available CRYTUR) ]
 +
*** Available for wrapping: 60 SICCAS crystals from CCAL && prototype [https://halldweb.jlab.org/wiki/index.php/All_modules_(with_SICCAS_crystals)_are_removed] [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/wrapped/ccal_crystals.pdf]
 +
*** George (DSG group) started disassembling CCAL modules and removing LMS caps.
 +
*** Mindy (DSG group) continues wrapping crystals and soldering wires to sockets
 +
**  Disassembling CCAL
 +
*** CCAL moved to the ESB
 +
*** [[All modules (with SICCAS crystals) are removed]]
 +
** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/part_preparation.pdf List of available parts]
 +
*** Some PMT housing are missing ( > 60, trying to find with Tim)
 
* '''Module fabrication'''  -- Sasha
 
* '''Module fabrication'''  -- Sasha
−
* '''Testing of PMT dividers''' -- Sasha / Arshak
+
<!-- ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf  Status of fabrication ] -->
 +
** Fabricated modules: <span style="color:#FF0000"> Total 1420 </span> (7 modules fabricated since last week)
 +
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 + 3 SICCAS]
 +
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 834 CRYTUR], available: 1
 +
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/11_11_22 Moving modules to the new lab (EEL108)]
 +
* '''[[Testing of PMT dividers]]''' -- Sasha / Arshak
 +
** Most parts for dividers have been received
 +
** 25 dividers for the prototype are ready (have to be tested), expect to receive the LV patch panel prototype
 +
during next week. The CCAL prototype should be ready by the end of next week (?)
 +
* '''Installation of the FCAL2 detector''' -- Sasha / Arshak
 +
** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page]
 +
** Updates from the meetings with Tim's group
 +
** Manpower and division of tasks
 +
** [https://halldweb.jlab.org/wiki/index.php/List_of_tasks_and_manpower Projects for summer students]
 +
** Meeting with the detector imaging group
 
* '''Light Monitoring System''' -- Arshak
 
* '''Light Monitoring System''' -- Arshak
 +
** [https://userweb.jlab.org/~aasatury/Fcal_LMS/500mkm_fiber/ 500mkm Fiber tests]
 
* '''Simulations/Analysis'''
 
* '''Simulations/Analysis'''
 +
 +
=Minutes=
 +
Attendees: Igal, Zisis, Sasha, Igor, Arshak, Phil, Olga, Liping, Azizah, Jon, Malte, Mark D., Jane, Axel, S.T.
 +
* George from detector support group disassembling COMCAL modules:  10 unwrapped, removed caps for fiber insertion
 +
* ~60 SICCAS crystals ready for rewrapping
 +
* Some PMT housings still missing -- may need to reorder
 +
* 1420 FCAL-2 modules have been assembled to date
 +
* 5x5 prototype of patch panel for LV distribution has been fabricated
 +
** Install in Hall for testing with beam
 +
** Plan for full scale design is for 4 long patch panels on each side of beam pipe
 +
** LV/HV/signal cables will be separated into different patch panels
 +
** LV will be supplied by unshielded ribbon cables w/ 8 lines, only using 3 -- consider shielded alternative?
 +
* List of summer students (~10 so far) coming together
 +
* Discussed graduate student and postdoc involvement (after construction:  data anlysis, calibration, etc.)
 +
* Malte will give a talk at the collaboration meeting on current FCAL plans and preparations for lead glass
 +
* Sasha will give the FCAL-2 talk, including a couple of slides on the LMS
 +
** Plexiglas is a viable solution, but with a small amount of cross talk
 +
** Fiber option:  no cross talk, but need to confirm light uniformity is good enough
 +
* LMS update: Arshak completed tests using individual 500 micron diameter fibers
 +
** Made 64 fiber bundle, one end at integrating sphere, the other individual separated holes in test setup
 +
** Uniformity at ~15-20% level, better than 250 micron fibers, with more light
 +
** Need to put fibers into donuts to attach to crystals
 +
** Need to make large bundle with sufficient spares (total number of fibers 1650-1700? Need 1596.)
 +
** Do we need multiple LED wavelengths? Useful for monitoring radiation damage.
 +
** Add time-stable reference?  Americium source.  Also for FCAL.  Malte suggested adding a fiber to each of the 4 existing plexiglas plates for use later.
 +
* LMS will add material in front of the insert and would make putting foam support upstream of the insert in the recess difficult
 +
** Simulate impact of material on cluster positions
 +
* Existing FCAL plexiglas needs to be modified for the new hole.
 +
** Inspect after removal, may need to replace
 +
* Expect electronics for LMS to be same as for DIRC/COMCAL

Latest revision as of 09:26, 6 February 2023

Meeting time and location:

  • 9:30 am EST (JLab time) remote only
  • Zoom meeting ID: 161 050 9142 Passcode: 004965

Agenda

during next week. The CCAL prototype should be ready by the end of next week (?)

Minutes

Attendees: Igal, Zisis, Sasha, Igor, Arshak, Phil, Olga, Liping, Azizah, Jon, Malte, Mark D., Jane, Axel, S.T.

  • George from detector support group disassembling COMCAL modules: 10 unwrapped, removed caps for fiber insertion
  • ~60 SICCAS crystals ready for rewrapping
  • Some PMT housings still missing -- may need to reorder
  • 1420 FCAL-2 modules have been assembled to date
  • 5x5 prototype of patch panel for LV distribution has been fabricated
    • Install in Hall for testing with beam
    • Plan for full scale design is for 4 long patch panels on each side of beam pipe
    • LV/HV/signal cables will be separated into different patch panels
    • LV will be supplied by unshielded ribbon cables w/ 8 lines, only using 3 -- consider shielded alternative?
  • List of summer students (~10 so far) coming together
  • Discussed graduate student and postdoc involvement (after construction: data anlysis, calibration, etc.)
  • Malte will give a talk at the collaboration meeting on current FCAL plans and preparations for lead glass
  • Sasha will give the FCAL-2 talk, including a couple of slides on the LMS
    • Plexiglas is a viable solution, but with a small amount of cross talk
    • Fiber option: no cross talk, but need to confirm light uniformity is good enough
  • LMS update: Arshak completed tests using individual 500 micron diameter fibers
    • Made 64 fiber bundle, one end at integrating sphere, the other individual separated holes in test setup
    • Uniformity at ~15-20% level, better than 250 micron fibers, with more light
    • Need to put fibers into donuts to attach to crystals
    • Need to make large bundle with sufficient spares (total number of fibers 1650-1700? Need 1596.)
    • Do we need multiple LED wavelengths? Useful for monitoring radiation damage.
    • Add time-stable reference? Americium source. Also for FCAL. Malte suggested adding a fiber to each of the 4 existing plexiglas plates for use later.
  • LMS will add material in front of the insert and would make putting foam support upstream of the insert in the recess difficult
    • Simulate impact of material on cluster positions
  • Existing FCAL plexiglas needs to be modified for the new hole.
    • Inspect after removal, may need to replace
  • Expect electronics for LMS to be same as for DIRC/COMCAL
Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=JEF_meeting,_February_3,_2023&oldid=118873"