The figure below shows the operating principle of the HelioxVL where the cryogenic cycle consists of two main phases:
In phase 1, the 3He gas, cryo-pumped by the cryogenic pump (sorb), is free to condense in the 1 K plate region of the central tube and runs down to cool the 3He pot and sample. After approximately 20 minutes, most of the gas has been condensed and the 3He pot is nearly full of liquid 3He at approximately 1.5 K.
In phase 2, the sorb is cooled to below 10 K and begins to reduce the vapour pressure above the liquid 3He. The sample temperature cools to its base temperature.