Difference between revisions of "JEF meeting, January 24, 2020"

From GlueXWiki
Jump to: navigation, search
Line 24: Line 24:
 
* [https://halldweb.jlab.org/wiki/index.php/Module_Design Preparation for module fabrication]
 
* [https://halldweb.jlab.org/wiki/index.php/Module_Design Preparation for module fabrication]
 
* [https://logbooks.jlab.org/entry/3769748 Studies of light guides (larger diameter)]
 
* [https://logbooks.jlab.org/entry/3769748 Studies of light guides (larger diameter)]
 +
 +
=Minutes=
 +
Attendees:  Varun, Jon Z., Tim W., Tim B., Arshak, Igal, Zisis, Josh, Sasha, Liping, Jane, Phil C., S.T.
 +
* Module fabrication area in TEDF has been cleaned out, tables are available, Walt A. has order shelves -- space is almost ready to go (some stuff will be moved out on Monday 1/27/20).
 +
* SICCAS update:  160 crystals packed and ready to be shipped to us in 4 boxes
 +
** 60 intended for NPS
 +
** Visual inspection and initial QA by Jane lead to rejection of 16% of crystals the company produced
 +
*** Some of the 160 crystals we accepted warrant further study
 +
*** NPS found discrepancies between their transmission measurements and the company's, we will test several to check
 +
*** Need to provide feedback to company after crystals arrive (in 2 weeks?)
 +
*Light yield setups: NPS setup is fully operational -- we are in the process of making a duplicate setup in EEL126, almost ready to go pending computer connections.
 +
* We went over Sasha's spreadsheet for module procurement
 +
** Some work on inner surface of mu-metal shields needs to be done by the company that does the welding
 +
** Plan to buy ESR (reflective material) and possibly mu-metal for entire 1600 crystal set.
 +
*** Some indication that putting ESR on end opposite to PMT leeds to ~5% larger yield -- reduce hole size?
 +
** Light guide diameter still not entirely pinned down -- 18 mm is standard size but we gain some light collection benefit going to 18.8 mm, which would require machining.  Question: is the extra $ expense worth it?
 +
** Tim B. has machine shop at UNCW that could be used for many possible tasks -- we are in the process of trying to find tasks that would be appropriate for him/his students to do.  Brass flanges?  PMT testing?
 +
** Need to find another source for brass straps (company we used before no longer carries exactly what we used).
 +
*** Still planning destructive stress test.

Revision as of 14:04, 27 January 2020

Meeting time and location= 10:00 am EST (JLab time) F226


Connection instructions

We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 992533564. Click "Expand" for more details.

  • Make sure you have created a BlueJeans account via your JLab CUE account using this link:
  • If connecting via Web Browser: click this link (no passcode is needed):
  • If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
  • If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above

Agenda

Minutes

Attendees: Varun, Jon Z., Tim W., Tim B., Arshak, Igal, Zisis, Josh, Sasha, Liping, Jane, Phil C., S.T.

  • Module fabrication area in TEDF has been cleaned out, tables are available, Walt A. has order shelves -- space is almost ready to go (some stuff will be moved out on Monday 1/27/20).
  • SICCAS update: 160 crystals packed and ready to be shipped to us in 4 boxes
    • 60 intended for NPS
    • Visual inspection and initial QA by Jane lead to rejection of 16% of crystals the company produced
      • Some of the 160 crystals we accepted warrant further study
      • NPS found discrepancies between their transmission measurements and the company's, we will test several to check
      • Need to provide feedback to company after crystals arrive (in 2 weeks?)
  • Light yield setups: NPS setup is fully operational -- we are in the process of making a duplicate setup in EEL126, almost ready to go pending computer connections.
  • We went over Sasha's spreadsheet for module procurement
    • Some work on inner surface of mu-metal shields needs to be done by the company that does the welding
    • Plan to buy ESR (reflective material) and possibly mu-metal for entire 1600 crystal set.
      • Some indication that putting ESR on end opposite to PMT leeds to ~5% larger yield -- reduce hole size?
    • Light guide diameter still not entirely pinned down -- 18 mm is standard size but we gain some light collection benefit going to 18.8 mm, which would require machining. Question: is the extra $ expense worth it?
    • Tim B. has machine shop at UNCW that could be used for many possible tasks -- we are in the process of trying to find tasks that would be appropriate for him/his students to do. Brass flanges? PMT testing?
    • Need to find another source for brass straps (company we used before no longer carries exactly what we used).
      • Still planning destructive stress test.