Projects per year
Abstract
A theoretical study is presented of the electrostatic electron cyclotron instability involving Bernstein modes in a magnetized plasma. The presence of a tenuous thermal ring distribution in a Maxwellian plasma decreases the frequency of the upper hybrid branch of the electron Bernstein mode until it merges with the nearest lower branch with a resulting instability. The instability occurs when the upper hybrid frequency is somewhat above the third, fourth, and higher electron cyclotron harmonics, and gives rise to a narrow spectrum of waves around the electron cyclotron harmonic nearest to the upper hybrid frequency. For a tenuous cold ring distribution together with a Maxwellian distribution an instability can take place also near the second electron cyclotron harmonic. Noise-free Vlasov simulations are used to assess the theoretical linear growth-rates and frequency spectra, and to study the nonlinear evolution of the instability. The relevance of the results to laboratory and ionospheric heating experiments is discussed.
Original language | English |
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Article number | 095002 |
Number of pages | 10 |
Journal | Plasma Physics and Controlled Fusion |
Volume | 58 |
Issue number | 9 |
DOIs | |
Publication status | Published - 27 Jul 2016 |
Keywords
- electrostatic electron cyclotron instability
- thermal ring distribution
- delta-function ring distribution
- bernstein modes
- Maxwellian distribution
- ionospheric heating
- magnetized plasmas
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Dive into the research topics of 'Electrostatic electron cyclotron instabilities near the upper hybrid layer due to electron ring distributions'. Together they form a unique fingerprint.Projects
- 1 Finished
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Multi-Scale Numerical Modelling of Magnetised Plasma Turbulence
Eliasson, B. (Principal Investigator), Phelps, A. (Co-investigator) & Ronald, K. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
26/01/15 → 25/07/18
Project: Research
Datasets
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Electrostatic electron cyclotron instabilities near the upper hybrid layer due to electron ring distributions
Eliasson, B. (Creator), Speirs, D. (Creator) & Daldorff, L. K. S. (Contributor), University of Strathclyde, 23 May 2015
DOI: 10.15129/56448d9e-adb0-4d2b-afdb-029165a40f54
Dataset