Capture Width of Vortex Lines for Negative Ions in Helium II

1966 ◽  
Vol 141 (1) ◽  
pp. 192-197 ◽  
Author(s):  
R. L. Douglass
Keyword(s):  
Negative Ions ◽  
Helium Ii ◽  
Vortex Lines

Capture Cross Sections for Negative Ions in Rotating Helium II

1965 ◽  
Vol 14 (15) ◽  
pp. 585-587 ◽  
Author(s):  
B. E. Springett ◽  
D. J. Tanner ◽  
R. J. Donnelly
Keyword(s):  
Cross Sections ◽  
Negative Ions ◽  
Capture Cross ◽  
Helium Ii ◽  
Capture Cross Sections

Negative Ions in Liquid Helium II

1965 ◽  
Vol 14 (1) ◽  
pp. 11-13 ◽  
Author(s):  
Boyce Burdick
Keyword(s):  
Liquid Helium ◽  
Negative Ions ◽  
Helium Ii

Negative-Ion Capture by Vortex Lines in Helium II

1966 ◽  
Vol 152 (1) ◽  
pp. 121-128 ◽  
Author(s):  
D. J. Tanner
Keyword(s):  
Negative Ion ◽  
Helium Ii ◽  
Vortex Lines

Motion of Negative Ions Along Quantized Vortex Lines

1968 ◽  
Vol 20 (25) ◽  
pp. 1428-1431 ◽  
Author(s):  
William I. Glaberson ◽  
Donald M. Strayer ◽  
Russell J. Donnelly
Keyword(s):  
Negative Ions ◽  
Quantized Vortex ◽  
Vortex Lines

Nonlinear Taylor–Couette flow of helium II

1995 ◽  
Vol 283 ◽  
pp. 329-340 ◽  
Author(s):  
Karen L. Henderson ◽  
Carlo F. Barenghi ◽  
Chris A. Jones
Keyword(s):  
Couette Flow ◽  
Equations Of Motion ◽  
Experimental Results ◽  
Second Sound ◽  
Helium Ii ◽  
Vortex Lines ◽  
Taylor Couette ◽  
First Time ◽  
Two Fluid ◽  
Taylor Couette Flow

We solve the nonlinear two-fluid Hall–Vinen–Bekharevich–Khalatnikov equations of motion of helium II for the first time and investigate the configuration of quantized vortex lines in Taylor–Couette flow. The results are interpreted in terms of quantities which can be observed by measuring the attenuation of second sound. Comparison is made with existing experimental results.

Roton Emission from Negative Ions in Helium II

1966 ◽  
Vol 16 (21) ◽  
pp. 934-936 ◽  
Author(s):  
G. W. Rayfield
Keyword(s):  
Negative Ions ◽  
Helium Ii

Growth of Pinned Quantized Vortex Lines in Helium II

1966 ◽  
Vol 141 (1) ◽  
pp. 208-210 ◽  
Author(s):  
W. I. Glaberson ◽  
R. J. Donnelly
Keyword(s):  
Quantized Vortex ◽  
Helium Ii ◽  
Vortex Lines

Radii of Positive and Negative Ions in Helium II

1966 ◽  
Vol 16 (2) ◽  
pp. 45-48 ◽  
Author(s):  
Peter E. Parks ◽  
R. J. Donnelly
Keyword(s):  
Negative Ions ◽  
Helium Ii

The behaviour of vortex lines near a wire in liquid helium II

1964 ◽  
Vol 277 (1369) ◽  
pp. 214-236 ◽  
Keyword(s):  
Vortex Core ◽  
Vortex Line ◽  
Core Radius ◽  
Potential Barriers ◽  
Helium Ii ◽  
Upper Limit ◽  
Vortex Lines ◽  
Large Vortex ◽  
The Wire ◽  
The Stability

By the application of classical hydrodynamics to the interaction between a wire and a parallel vortex line it is shown that states having different numbers of quanta of superfluid circulation about the wire are separated by high potential barriers. Possible ways of overcoming or avoiding the barriers are discussed, and it is concluded that such states are normally metastable. A method for finding steady vortex-line configurations is then developed, and it is found that, in an apparatus of the type used by Vinen (1961 b ) to detect single quanta of circulation, states having vortex lines partly attached to the wire are metastable in certain circumstances. These results are compared with Vinen’s account of his experiment. They agree well with the observations made when the apparatus had ceased to rotate. During rotation some points remain puzzling, but the failure to attain equilibrium, ascribed by Vinen to an anomalously large vortex core, is now seen to arise from the trapping of vortex lines in metastable states. A critical superfluid velocity of about 10 3 cm/s for the creation of vortex lines at a solid surface is derived, and, from this and the experimental observation of the stability of integral circulation about the wire against vibration, an upper limit of 3 x 10 -6 cm to the vortex core radius is tentatively deduced. It is concluded that the theory of quantized vortex lines of small (≈ 10 -7 cm) core radius can account fairly well for the observations. Further possible tests of the theory are suggested.

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