Refrigerators Pomeranchuck

The flexible material can be Be-Cu, but also plastic (Kapton). The starting temperature for the refrigeration of a Pomeranchuck cell is usually around 25 mK, produced by a DR. Recent realization of Pomeranchuck refrigerators can be found in ref. [6-7,13]... 

Fig. 7.3. Comparison of the relative cooling powers Qlh of a Pomeranchuck refrigerator and of a dilution refrigerator. In the former case, die liquid is converted into solid at a rate of 10 fxmol/s in die latter case, 3He is removed from the mixing chamber at the same rate. 

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