QUOTE (nprev @ Feb 7 2007, 06:19 PM)
I suspect that the root cause may well be the at the detector's electrical connections to the rest of the instrument, esp. if they're using something like socket ball-locks for critical board interfaces (the chip) instead of hard solder joins. Thermal expansion/contraction can play hell with the former, causing high-resistance pathways and consequent data dropouts.
Possibly. There could be many causes of early life degradation, there is not a lot of public information on the symptoms and on the system / board design details that I am aware of to speculate. Given that sockets (in a generalization) can have reliability issues in high vibration and high thermal cycling environments, why would they be used in a production board that operates in the aforementioned conditions? Sockets in protos, yes, but I would not spec them for production unless there is a very good reason to.