Back to Search Start Over

Response of a charged particle in contact with a chaotic thermostat to an oscillating electric field

Authors :
George Morales
Source :
Physics of Plasmas. 27:052105
Publication Year :
2020
Publisher :
AIP Publishing, 2020.

Abstract

A numerical investigation is made of the response of a thermalized charge in contact with a chaotic thermostat to an externally applied, oscillating electric field, with and without a confining magnetic field. This study is based on the recent theoretical development of a chaotic thermostat [G. J. Morales, Phys. Rev. E 99, 062218 (2019)] for which the static properties of a thermalized charge (spatial diffusion and mobilities) were previously established. It is found here that in the unmagnetized case, to extract significant power from the oscillating electric field requires that the oscillatory velocity be larger than the thermal velocity. The spatial diffusion caused by the self-consistent, chaotic fluctuations is shown to be reduced, and even suppressed, by the coherent oscillations. The frequency-dependent mobilities, including cyclotron resonance, are determined, and the nonlinear modifications produced by large electric fields are explored. The value of the mobilities and the modifications to the diffusion coefficient exhibit non-monotonic dependencies on the control parameters.

Details

ISSN :
10897674 and 1070664X
Volume :
27
Database :
OpenAIRE
Journal :
Physics of Plasmas
Accession number :
edsair.doi...........24ef768d7b88db7d6a2559bbda328006