A cryogenic system for studying the properties of He3 between 1 and 15 mK

Autor:	M. T. Loponen, Yu.D. Anufriyev, P. Buch Lund, H. K. Collan, T. A. Alvesalo
Rok vydání:	1974
Předmět:	Materials science General Physics and Astronomy Thermodynamics chemistry.chemical_element Heat capacity Copper Viscosity Circulation (fluid dynamics) chemistry Heat exchanger General Materials Science Dilution refrigerator Lambda point refrigerator Adiabatic process
Zdroj:	Cryogenics. 14:384-390
ISSN:	0011-2275
Popis:	A cryogenic system for studying the properties of He3 between 1 and 15 mK is described. The apparatus has been utilized for measurements of viscosity and heat capacity of liquid He3 along the melting curve. He3 is refrigerated in two steps. For temperatures down to about 15 mK a rather powerful dilution refrigerator, with a circulation rate of 70 μmoles s−1, is used. This machine has sintered copper heat exchangers of novel design. Below 15 mK He3 is self-cooled through adiabatic compression of a liquid/solid mixture (Pomeranchuk's method). A description of constructional details and performance characteristics of the dilution refrigerator and the compressional cooling cell is given. Some aspects of thermometry are also discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::feefc7aa6a606d733722f2e12e4c406a https://doi.org/10.1016/0011-2275(74)90079-4 Zobrazit plný text záznamu