General

The word Cryogenics comes from the Greek language and means "the production of freezing cold"; however the term is used today as a synonym for the low-temperature state. There is no clear definition where refrigeration ends and cryogenics begins. Some definitions use 123 Kelvin, others use 93.15 Kelvin, because the boiling point of the so-called permanent gasses lies below that.

Cryogenic Coolers

The cryogenic temperature is the temperature to which the cooler is stabilized by regulating the input power to the cooler. Usually this is 75, 77 or 80K, depending on the required setpoint in the application. If full input power is applied to the cooler, the temperature that can be achieved is lower then these values.

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