Exchange of submodules (pick-up of finished modules in Bochum, receive of ones that need repair from Bonn) foreseen for Wednesday this week (Christoph and Tom)
HV distributor board:
Bochum would like to get a working distributor board ("Schmidt board") in order to perform submodule readout and HV setting tests of the "Jülich" test stand currently build up in Bochum
There are four boards operated in Bonn, one more board may be finished soon to be given to Bochum, some more boards are foreseen to be produced anyway
There is some drift and slow settling effect of APD-HV setting with the distributor boards. A change in the voltage divider resistance dividing APD HV to ADC readout by a factor of 5 (20 M to 100 MOhms) reduces the time of stabilization (effect of resistance change due to power dissipation?)
However, need to check whether increasing voltage divider resistance does increase susceptibility to surface currents on PCB, maybe sealing necessary (rad. hard - Elastosil?)
There is also a long term drifting (in the order of 20 mV in 2 days) whose origin is not clear yet
Takeover of KVI work of Peter Schakel:
Who will be a suitable/willing/available candidate to take over the work preveiously done by Peter Schakel (KVI) for the SADC FPGA readout firmware? (Malte?, Johannes?)