View source for Optical Cryostat (Janis ST-100)

[[File:ST-100.JPG|thumb|400px|]]

==Files==
There is a hard copy of the manual in the lab.

[https://wiki.physics.wisc.edu/yavuz/images/c/c3/ST-100_Drawing.pdf Technical Drawing]


==Notes==

Here are some random useful pieces of information to know gathered mostly from emails with Dan Logan from Janis:

* The ST-100 is designed to hold and operate at <math>10^{-4}</math> Torr and the seals should hold this pressure for "several hours if not several days".
::It seems like this is not the case.  

* With continuous evacuation with a turbo pump the pressure should be able to reach <math>10^{-5}</math> or <math>10^{-6}</math> Torr, the ladish gaskets on the cryostat aren't able to hold this high of a vacuum without the pump on though.

* The performance of the cryostat will be better but the pressures as low as <math>10^{-3}</math> Torr can be acceptable.

* The ST-100 should not be baked out because the window block and electrical feedthroughs are sealed using epoxy and baking out the cryostat might cause the epoxy to melt.

* What we've seen is that at room temperature while continuously pumping with the [[Turbo Pump Station (HiCube 80 Eco)|Pfeiffer turbo pump]] the pressure is pretty constant around 5.6<math>*10^{-5}</math> mbar (~4.2<math>*10^{-5}</math> Torr).  While the cryostat is held around 5 K and continuously pumped down, the pressure gets as low as 4<math>*10^{-8}</math> mbar (~3<math>*10^{-8}</math> Torr).