This is a picture of the Orion chip’s sample holder attached to one of our dilution fridges, ready to begin a cooldown.
The base temperature at which we operate (5mK, or 0.005 degrees above absolute zero) is about 500 times colder than interstellar space. In other words the difference between interstellar space and the base temperature of our fridges is about 5 times greater than the difference between room temperature (about 300K) and interstellar space (about 2.7K).
This is a Leiden Cryogenics dilution fridge. These are beautiful, dependable machines that come highly recommended. We have three of these operational and haven’t had any problems with them in over 2 years of operation.