Dilution Refrigeration
3He-4He DilutionThe CryostatDetails of the CryostatPicturesFridge Links

The Cryostat

Here is a rough schematic of the 75 microWatt cryostat used at Berkeley. This unofficial picture shows the basic structure of the cryostat, specifically the different stages of cooling that lead to the ultimate temperature of 20 milliKelvin, at which the particle detectors are tested.

For a detailed description of how the dilution fridge works, check out the ?