Minutes of the forward endcap EMC eZuce SRN meeting, 8th of April 2019, 14:15-15:00
Bochum: Fritz-Herbert, Jan, Matthias, Miriam, Tobias T., Tom
Bonn: Christoph, Tobias, Ulrike
Giessen: Hans, Markus
APD-Submodule Material Bonn:
Coaxial cable manufactured by the Bonn electronics workshop will start today (delay because of other priorities)
C-shaped distributor boards (for Juelich test stand) will be delivered on 10th of April
All (35 more) submodule handles are finished (with rubber grips!), mounting to the submodules only after glueing of inserts into alveoles!
Tobias (Bonn) presented an overview of the Bonn cosmics stand measurements
Some channels would benefit from higher gain/higher VPTT bias voltage in terms of S/N ratio, resulting in less maximum detectable energy deposit. As the 12 GeV maximum detectable energy threshold is only valid for the very inner VPTT equipped crystals, a lower maximum detectable energy will be tolerable in the outer VPTT-equipped forward endcap region.
No recently manufactured SADC power supplies, no orders pending - maybe orders from Bochum (about 4 pieces?) got lost (Malte will clarify with Pawel)
APD Irradiation/Handling PCBs:
Bochum colleagues would prefer spring contacts rather than machined connectors on the boards, the Giessen colleagues, however, are pretty satisfied with the PCBs as they are, provided that a modified IC extraction tool is used (they will send the drawings)