New methods for nuclear cooling into the microkelvin regime

Autor:	George R. Pickett, I. E. Miller, D. I. Bradley, S. G. Mussett, V. Keith, C. J. Kennedy, A. M. Guénault, W. P. Pratt
Rok vydání:	1984
Předmět:	Materials science Nuclear engineering chemistry.chemical_element Refrigeration Thermodynamics Cryogenics Condensed Matter Physics Copper Atomic and Molecular Physics and Optics Refrigerant chemistry Thermometer Magnet General Materials Science
Zdroj:	Journal of Low Temperature Physics. 57:359-390
ISSN:	1573-7357 0022-2291
DOI:	10.1007/bf00681199
Popis:	We describe the philosophy and practice of a new method of nuclear cooling in which the copper refrigerant is immersed directly in the3He sample to be cooled using a guard cell configuration. The method has been used to cool liquid3He to ∼120 µK. We also describe a variant of the method intended for cooling metallic samples, by which a platinum NMR thermometer has been cooled to ∼13 µK. Finally, in an appendix we suggest a very simple nuclear cooling method utilizing the copper flakes used in the manufacture of paint, which will cool liquid3He to around 1 mK with a minimum of cryogenic effort.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29312a9337db60890f25227025426bb6 https://doi.org/10.1007/bf00681199 Zobrazit plný text záznamu Full text from SpringerLink