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Showing 1 to 11 of 11 for “"Cyclotron waves"”.
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Dispersion of Ion Cyclotron Waves in Magnetoplasmas
Made available in DSpace on 2014-12-04T21:03:21Z (GMT). No. of bitstreams: 1 6104289.pdf: 3615786 bytes, checksum: a417fd7c861925d1016c4c824958f99f (MD5) Previous issue date: 1961
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Current-drive and plasma-formation experiments on the Versator-II tokamak using lower-hybrid and electron-cyclotron waves
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Mode conversion current drive experiments on Alcator C-Mod
… with multiple ion species, fast magnetosonic waves (FW) in the Ion Cyclotron Range of Frequency can mode convert to shorter wavelength modes at the Ion-Ion hybrid layer, leading to localized electron heating and current drive. Due to k1l upshifts associated with the poloidal magnetic field, …
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Ion thermalization and wave excitation downstream of Earth's bow shock: Theory and observation
… is unstable to the excitation of ion-cyclotron waves. These waves in turn scatter the protons and ions to marginal stability. A quasilinear theory is presented for the relaxation of the proton and helium distribution functions and the associated excitation of ion cyclotron waves, …
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Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod
Radio frequency (rf) waves in the ion cyclotron range of frequencies (ICRF) are widely used for heating fusion plasmas. In a multi-ion-species plasma, the launched fast waves convert to ion cyclotron waves and ion Bernstein waves in the vicinity of the two-ion hybrid resonance between the cyclotron …
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Electron Bernstein wave current drive modeling in toroidal plasma confinement
… driven toroidal currents. Radio frequency waves in the electron cyclotron (EC) range of frequencies can drive localized currents and are thus particularly attractive for control of the current profile. In the high-[beta] regimes of spherical tokamaks (ST) such as NSTX and MAST, heating and …
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Radiation of VLF/ELF waves from a magnetospheric tether
… propagation and radiation of Electromagnetic Ion Cyclotron Waves (EMIC) from a high-voltage magnetospheric tether, which are the waves proposed to scatter protons. The plasma is anisotropic due to the external Earth's magnetic field and it is assumed to have sufficiently low density, temperature …
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Numerical Simulation of Ion-Cyclotron Turbulence Generated by Artificial Plasma Cloud Release
… lies near harmonics of the ring plasma ion cyclotron frequency and propagates nearly perpendicular to the background magnetic field as predicted by the linear theory. If the amplitude of the turbulence is sufficiently large, the quasi-electrostatic short wavelength ion cyclotron waves evolve …
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Experimental tests of parallel impurity transport theory in Tokamak plasmas
… Magnetically trapped fast ions, sustained by ion cyclotron waves, create a poloidally varying electrostatic potential which causes high-Z impurities to accunmulate on the inboard side. Existing theory is extended to include this effect by incorporating a species that has an anisotropic pressure …
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Wave-particle interactions in the solar wind and solar flares
… interactions between particles and plasma waves play an important role in both the solar wind and solar flares. The dynamics of plasma turbulence in these settings controls the strength of the interactions, by determining the amplitudes of the small-scale electromagnetic fluctuations that …
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A statistical study of plasmawaves and energetic particles in the outer magnetosphere
… field, and interacting with a variety of waves. The dynamics of energetic particles are often described in terms of three kinds of adiabatic invariants. Energetic electrons are often unstable to the whistler-mode chorus waves, and ions, to the electromagnetic ion cyclotron (EMIC) …