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Observation of a second critical field for negative ions in He II

Allum, D. R. and McClintock, Peter V. E. (1976) Observation of a second critical field for negative ions in He II. Journal of Physics C: Solid State Physics, 9 (14). L371-L375. ISSN 0022-3719

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Abstract

We have measured the drift velocity v of negative ions in He I1 near 1 K, under a pressure of 25 bar, for electric fields E up to 17 kV/cm. Beyond Ec1, the critical field for creation of stable charged vortex rings, we have observed a second critical field Ec2 at which v passes through a minimum and then starts to increase again. Numerical values of the rate nu at which rings are nucleated, and of the rate P at which the ions escape from the rings again when E > Ec2, are calculated from the experimental data.

Item Type: Article
Journal or Publication Title: Journal of Physics C: Solid State Physics
Subjects: ?? qc ??
Departments: Faculty of Science and Technology > Physics
ID Code: 32517
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 12:17
Refereed?: Yes
Published?: Published
Last Modified: 30 Aug 2017 12:56
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32517

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