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The guys a linustechtips watercooled one of their Red Helium 8k Cameras. And the actually did cool the sensor itself and not the processor.

Its a video series but the final assembly and test is shown here: https://www.youtube.com/watch?v=OEUCNh5g-2I

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I have a friend who does amateur astrophotography and talks a lot about modifying DSLRs to cool the sensor and things like that. I never listen very carefully because I'm never going to devote the time and money the hobby requires, but I take it there's a dedicated community that does this kind of thing.

With that name, they should have liquid-helium-cooled them.

IIRC, they had to be careful not to _overcool_ the sensor because the sensors have an acceptable range in which they work.

Anyway, the entire series of videos is pretty fun to watch.

Yes, too low a temperature also messes with electrical properties. And makes everything very brittle, too.

A lot of the scientific sensors are Peltier cooled to -20C to reduce noise, particularly IR.

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