Minutes of the forward endcap EMC eZuce SRN meeting, 25th of March 2019, 14:00-14:45

Presence:

• Basel: -
• Bochum: Fritz-Herbert, Claudius, Malte, Matthias, Miriam, Tobias H., Tom
• Bonn: Christoph
• Groningen: -
• Stockholm: -
• Uppsala: Pawel
• Giessen: Markus
• GSI: -

APD-Submodule Material Bonn:

• 600 more pieces of signal coaxial cables will be manufactured by the Bonn electronics workshop
• Shipping of the cables together with the last 200 drilled capsules and the newly ordered ground strips
• HV and LV plug housings for the complete FWEC all available at Bonn, also to be sent to BO

Cosmics Tests Summary of all VPTT-Submodules:

• 2 VPTT submodules (the latest ones repaired in BO) still running in the climate chamber test stand
• Student is working on vptt submodule measurement summary

SADC crate:

• Backplane PCB went to production
• First version of power supplies went to production
• Irradiation tests at KVI: power supply did not survive
  • 3 chips on supplies: 1 controller, 2 drivers for DC/DC converters
  • 10^11 protons: 1 driver okay, the other one died (voltages tripped)
  • Reason/actual damage not yet clear - device still too hot to handle (waiting 1-2 weeks of declining radioactivity)
  • Too high rate (10^9 protons/(cm^2 s)) reason for damage?