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Helium‐3 Dilution Makes Millidegree Temperatures

JUL 01, 1967

DOI: 10.1063/1.3034403

Physics Today

A new kind of refrigerator for cooling below 0.1 °K holds great promise for cryogenics. Over the past year several groups have built ${He}^{3}$ ‐dilution refrigerators that can cool samples continuously below 0.2°. Although adiabatic‐demagnetization methods have traditionally been used to cool below 0.3°, the new refrigerator is much simpler to use. At the April American Physical Society meeting John Wheatley (formerly of the University of Illinois and now at the University of California, San Diego) reported that his continuously operating ${He}^{3}$ ‐dilution refrigerator had reached 0.020° and his single‐cycle device had reached 0.0044°.

© 1967. American Institute of Physics

This Content Appeared In

Volume 20, Number 7

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