Guio, P;
Pecseli, HL;
(2016)
Weakly nonlinear ion waves in striated electron temperatures.
Physical Review E
, 93
(4)
10.1103/PhysRevE.93.043204.
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Abstract
The existence of low-frequency waveguide modes of electrostatic ion acoustic waves is demonstrated in magnetized plasmas for cases where the electron temperature is striated along magnetic field lines. For low frequencies, the temperature striation acts as waveguide that supports a trapped mode. For conditions where the ion cyclotron frequency is below the ion plasma frequency we find a dispersion relation having also a radiative frequency band, where waves can escape from the striation. Arguments for the formation and propagation of an equivalent of electrostatic shocks are presented and demonstrated numerically for these conditions. The shock represents here a balance between an external energy input maintained by ion injection and a dissipation mechanism in the form of energy leakage of the harmonics generated by nonlinear wave steepening. This is a reversible form for energy loss that can replace the time-irreversible losses in a standard Burgers equation.
| Type: | Article |
|---|---|
| Title: | Weakly nonlinear ion waves in striated electron temperatures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevE.93.043204 |
| Publisher version: | http://dx.doi.org/10.1002/aenm.20150 |
| Additional information: | This article is available under the terms of the Creative Commons Attribution 3.0 License (CC-BY). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. For further information, see http://creativecommons.org/licenses/by/3.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1485901 |
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