checked current: turns out no bias is reaching the detector, detector short on the cold side
remembered recurring tower short during installation. We got rid of it at the end of installation by pushing the SQUET around, and it was still not present at 77K. Checked at breakout box: this short is back (~2 MOhm)
I was hopeful that Side2-readout HV would work because the shorted channel is on Side 2. But it has the same problem…
There’s an additional short somewhere in Cable 1 too, this is evident from measuring resistance at the HV connector. But I can’t find it at the breakout box. Will investigate further.