View source for October 25, 2019 FCAL Insert Design Meeting

= Meeting Time and Place ==

Wednesday Oct, 9 10:00 am
At Jefferson Lab, room TED 2504

* Present - Sasha Somov, Josh Crafts, Eugene, Stephanie, Keith Harding, Tim, Fernando, Chris Stanislav

== Agenda ==
* Action items from last meeting https://halldweb.jlab.org/wiki/index.php/October_9,_2019_FCAL_Insert_Design_Meeting
* Discuss Tungsten absorber
** Cover 1.5 crystals ok?
** Rohacell supported
* Monitoring System
** Testing plan
** 1mm fibers
** 15cm square with 6mm 45 degree bevel
* Cooling of blocks - 2.1 KW needed
* Support structure and assy sequence 
** [[Media:FCAL Insert Module installation procedure.pdf]]
* electronics patch panels DS of crystal pmts
* Discuss Testing of soldered assembly and mag field testing
* Discuss test fixture for PMTs in beam

== Minutes and Action Items ==

* Josh has 1mm fiber for test
* Mu metal shields are in house - 6mm shorter than steel
* 12 crystal test setup
** No Survey needed for 12 crystal tests (initially)
** Need vertical adjustment capability
* Need to ask Matt Shepherd for measurements of previous FCAL lead glass modules
* Keith presented a fairly detailed assembly sequence and plan
** Everyone was relatively happy but always a concern for stack up tolerances and forces
* Discussed Signal and HV cables and Fernado mentioned an alternate plan with patch panel at top and bottom of array
** More discussion needed