Kar, C. ; Sundaram, A. K. ; Sen, A. (1991) Nonlinear enhancement of drift waves by kinetic Alfvén waves Physica Scripta, 43 (3). pp. 290-295. ISSN 0031-8949
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Official URL: http://iopscience.iop.org/1402-4896/43/3/014
Related URL: http://dx.doi.org/10.1088/0031-8949/43/3/014
Abstract
The nonlinear decay of a kinetic Alfven wave into another kinetic Alfven wave and a drift wave is studied. In the collisionless regime the growth rate of drift waves is found to be comparable to the ion acoustic decay rate. Temperature gradient driven drift waves with larger growth rates are also excited. Effects of spatial inhomogeneity are considered using a perturbative scheme, and the condition for an absolute drift instability is obtained. The nonlinear process studied here could have application in the Alfven heating scheme where the excited kinetic Alfven wave has an enhanced amplitude.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Royal Swedish Academy of Sciences. |
| ID Code: | 85250 |
| Deposited On: | 02 Mar 2012 07:13 |
| Last Modified: | 02 Mar 2012 07:13 |
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