Observation of an unstable l =1 diocotron mode on a hollow electron column
Journal Article
·
· Physical Review Letters; (USA)
- University of California at San Diego, La Jolla, California 92093 (US)
Stable and unstable diocotron modes varying as {ital e}{sup {ital il}{theta}}, with {ital l}=1, are measured on a magnetized, partially hollow electron column. The unstable mode is observed to grow exponentially over several decades, in contradiction to present 2 D fluid theory. This {ital l}=1 instability can dominate the evolution well into the nonlinear regime, resulting in cross-field transport to a stable, monotonically decreasing density profile. To the extent this process is described by 2D {bold E}{times}{bold B} drifts, it is isomorphic to the Kelvin-Helmholtz shear-flow instability of inviscid fluids.
- OSTI ID:
- 6981936
- Journal Information:
- Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:6; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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