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Showing 1 to 8 of 8 for “"collisionless plasmas"”.
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Electron equations of state during magnetic reconnection
… local electron dynamics. Particularly in collisionless plasmas, velocity-space anisotropy of the electrons plays a leading role in governing the energy exchanges and shaping the currents that develop during reconnection. The anisotropy results from an electric field parallel to the …
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Magnetic reconnection physics in the solar wind with Voyager 2
… by which the magnetic topology evolves in collisionless plasmas. This phenomenon is fundamental to a broad range of astrophysical processes such as stellar flares, magnetospheric substorms, and plasma accretion, yet it is poorly understood and difficult to observe in situ. In this thesis, …
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Analytic calculations of MHD equilibria and of MHD stability boundaries in fusion plasmas
… the ideal MHD energy principle in fusion grade plasmas is assessed. Six models are introduced, which are constructed to better describe plasma collisonality regimes for which the approximations of ideal MHD are not justified. General 3-D quadratic energy relations are derived for each of these …
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Electrostatic Trapping as a Self-Consistent Phenomenon in Plasmas and other Collective Systems
… self-consistent electrostatic structures in plasmas and related collective systems. They are coherent structures in which particles become trapped in the wave potential. These phenomena require a kinetic description i.e. a description in which the velocity distribution of the particles is …
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Energy partition in magnetic reconnection and kinetic turbulence in weakly collisional plasmas
… and decaying turbulence in weakly collisional plasmas. One of the open questions regarding magnetic reconnection is how magnetic energy is dissipated into particle heating, kinetic energy, and supra-thermal particle acceleration; an understanding of energy partition in reconnection may be used …
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Wave-particle interactions in the solar wind and solar flares
… Although resonant interactions in turbulent plasmas have been studied extensively, most previous studies have employed highly simplified assumptions about the wave power spectra and/or particle velocity distributions, for example, taking the wave power spectra to be isotropic, or taking all …
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Extended general relativistic magnetohydrodynamics: Formulation and application to black hole accretion
… larger than the inflow time. Thus, the plasma is collisionless and is subject to a wide range of kinetic phenomena that are absent from current general relativistic ideal magnetohydrodynamic models. We exploit the gyro ordering of a collisionless magnetized plasma, and use Israel-Stewart formalism …
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Experimental investigation of nonlinear interactions of drift waves
Collisionless cesium and potassium plasmas are investigated in a single-ended Q-machine. A wave associated with the circular plasma-limiting aperture is observed when the plate temperature is high enough. This wave and the ordinary drift wave interact nonlinearly to produce new waves at the sum and …