Abstract
It is now possible to achieve temperatures at least as low as 2.0 mK in a continuous way by dilution of He 3 in He 4 with the use of continuous Ag powder heat exchangers of very large area. The equation of a continuous heat exchanger is rewritten in a practical form. This equation allows the calculation of the area needed to achieve a given minimum temperature as a function of flow rate, heat leaks and Kapitza resistance. Heat leaks, and on the calculation of the heat exchanger channels sizes are discussed.
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