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Critical flow of superfluid helium-4 through a submicron aperture: Dependence on pressure

โœ Scribed by O. Avenel; E. Varoquaux; W. Zimmermann Jr.

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
215 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

We report the existence of a pressure dependence of the critical velocity of flow of superfluid 4He through a submicron aperture. Combined with the already-known temperature dependence of the critical velocity at very low temperatures, this observation puts further experimental constraints on the mechanism responsible for the nucleation of phase slips in 4He.

๐Ÿ“œ SIMILAR VOLUMES

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Critical flow of superfluid helium-4 through a submicron aperture: width of the critical transition
โœ W. Zimmermann Jr; O. Avenel; E. Varoquaux ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 221 KB

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LIgUID HELIUM S 143 heat transport by liquid 4He through a narrow slit at eleven temperatures between 1. IยฐK and 2. IยฐK for values of AT up to 1000 millidegrees. The slit (1.9 cm long and 2 microns wide) connects two reservoirs of liquid helium, one thermally isolated and fitted with a heater, the o