SBS Weekly
April 11, 2018

Present

Riordan, Shahinyan, Tireman, Annand, Cornejo, Montgomery
Wojtsekhowski, Quinn, Puckett, Camsonne, Fuchey
Cao


Agenda - Shahinyan, ECal Progress

Frame is designed into two parts by JLab designers

Have significant work for front end electronics
DAQ platform layout is ready for test lab

PMT bases will need to be rebuilt (being done by JMU, Niculescu)

Have ordered 300 light guides of BK7, to order high temperature epoxy

New light guides 25% less transparency, not sure if due to polishing

Modules will be tightened with spring

Shows picture of assembled supermodule
Using 5mil copper foil to wrap blocks
Has elliptic Al tube, two holes to flow air to rear

Not using silicon rings yet - may damage foil wrapping, not tested

Heating similar to C16

Able to estable heating gradient with 3x3 module, ~60W
    40C in rear with no PMTs and full cooling (40inH2O)
    goes to 60C with no cooling

Shows drawings from JLab designers

Front frame ordered, arrive July or August

Needs lots of manpower to build

Jack will develop flowmeter for GEM chambers as well as this using hot wire

Andrew wants to know density of blocks
    Not clear how many of different blocks are available
    Albert says number of yellow blocks are 5-10%