Minutes of the Forward Endcap EMC Vibe/eZuce meeting, 10th of August 2020, 14:00-15:00

Presence:

• Bochum: Matthias, Jan R.,Malte, Miriam, Tobias H., Tobias T., Sebastian, Thorsten
• Basel: -
• Bonn: Christoph, Johannes
• Groningen: -
• Uppsala: -
• Giessen: Hans Georg, Markus

Submodule Measurements Bonn:

• Jan promised to send the relevant bias voltage data for the APD submodules currently in Bonn for cosmics tests today or tomorrow

HV Control Board:

• Three boards manufactured (two for Bonn, one for Bochum)
• The non irradiated boards show no drifting voltages as the latest tested ones (voltages stable to +/- 10 mV)
• However, as also MOSFET and BJT were exchanged to originally foressen types the absense of drifting may have other reasons

SADC Board:

• SADC crosstalk measurements (Sebastian Otto, Bonn) show 3 MeV intrusion 'into crystal' in neighborhood of 12 GeV signal receiving one
• Malte proposed to show pictures and thermogrammes of SADC cooling crates
• Bochum workshop finished redesigned parts for SADCs