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--- wiki:1k_pot [2022/01/26 21:32]
henri.godfrin@neel.cnrs.fr
+++ wiki:1k_pot [2022/01/29 18:30] (current)
henri.godfrin@neel.cnrs.fr
@@ Line 9: / Line 9: @@
 ===== The "1K loop" in pulse-tube based dilution refrigerators =====
   * Dry dilution refrigerator with 4He-1K-loop, K. Uhlig, Cryogenics 66, 2015, 6-12. https://doi.org/10.1016/j.cryogenics.2014.10.004
+===== Condensing the 3He at high pressure  =====
+{{ condensing3he.jpg?400 |Condensing 3He}}
+At 4.2 K the minimum enthalpy (vs. Pressure) is Hm ≈ 42 J/mol near 3 bars, just above the enthalpy of the vapor at 0.7 K (35 J/mol). Steady state is possible using a heat exchanger to precool the incoming 3He:
+  * J. Kraus, Cryogenics 17, 173 (1977) [[https://doi.org/10.1016/0011-2275(77)90279-X]]
+  * A.T.A.M. de Waele, A.B. Reekers, H.M. Gijsman, Cryogenics 17, 175 (1977) [[https://doi.org/10.1016/0011-2275(77)90280-6]]

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