Recent content by nevsf

Try Empire Magnetics. They make cryogenic rotary motors. The lead times are long and they're very expensive, but worth a try if you really need it.

I'm using a modified optical mirror mount with springs. It works fine at 30K. Not much should change going down to 4.2K. Unless the spring constant is very critical I'd suggest just trying the assembly. Conventional wisdom is that springs stay springs even at low temperature. FYI, I've also...

I am trying to align light from an optical fiber in an imaging assembly. Currently the optical fiber is outside of the cryostat and the light is coupled in through a window and the fiber is outside the cryostat. I am investigating putting the fiber and all the optics inside the cryostat, but I...