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A particle-in-cell approach to obliquely propagating electrostatic waves
KTH, School of Electrical Engineering (EES). Space Commercial Serv Holdings SCSH Grp, South Africa; SANSA, South Africa.ORCID iD: 0000-0002-4030-1014
2014 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 21, no 9Article in journal (Refereed) Published
Abstract [en]

The electron-acoustic and beam-driven modes associated with electron beams have previouslybeen identified and studied numerically. These modes are associated with Broadband ElectrostaticNoise found in the Earth’s auroral and polar cusp regions. Using a 1-D spatial Particle-in-Cell sim-ulation, the electron-acoustic instability is studied for a magnetized plasma, which includes coolions, cool electrons and a hot, drifting electron beam. Both the weakly and strongly magnetizedregimes with varying wave propagation angle, h, with respect to the magnetic field are studied. Theamplitude and frequency of the electron-acoustic mode are found to decrease with increasing h.The amplitude of the electron-acoustic mode is found to significantly grow at intermediate wave-number ranges. It reaches a saturation level at the point, where a plateau forms in the hot electron velocity distribution after which the amplitude of the electron-acoustic mode decays

Place, publisher, year, edition, pages
2014. Vol. 21, no 9
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-151413DOI: 10.1063/1.4894529ISI: 000342760900012OAI: diva2:748552

QC 20141104

Available from: 2014-09-19 Created: 2014-09-19 Last updated: 2014-11-04Bibliographically approved

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Koen, Etienne
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