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Gyrokinetic Theory Of Fast Wave Transmission With Arbitrary Parallel Wave Number In A Non Uniformly Magnetized Plasma
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Book Synopsis Gyrokinetic Theory of Fast Wave Transmission with Arbitrary Parallel Wave Number in a Non-uniformly Magnetized Plasma by : C. N. Lashmore-Davies
Download or read book Gyrokinetic Theory of Fast Wave Transmission with Arbitrary Parallel Wave Number in a Non-uniformly Magnetized Plasma written by C. N. Lashmore-Davies and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gyrokinetic Theory of Fast-wave Transmission with Arbitrary Parallel Wave Number in a Non-uniformally Magnetized Plasma by : Chris Lashmore-Davies
Download or read book Gyrokinetic Theory of Fast-wave Transmission with Arbitrary Parallel Wave Number in a Non-uniformally Magnetized Plasma written by Chris Lashmore-Davies and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-11 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Euroabstracts written by and published by . This book was released on 1990 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Euro Abstracts written by and published by . This book was released on 1991 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1992-04 with total page 1522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Short Introduction to General Gyrokinetic Theory by : Hong Qin
Download or read book A Short Introduction to General Gyrokinetic Theory written by Hong Qin and published by . This book was released on 2005 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Theory of Fast Wave Absorption, Transmission and Reflection in the Ion Cyclotron Range of Frequencies by :
Download or read book A Theory of Fast Wave Absorption, Transmission and Reflection in the Ion Cyclotron Range of Frequencies written by and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gyrokinetic Particle Simulations of Reversed Shear Alfvén Eigenmodes in Fusion Plasmas by : Wenjun Deng
Download or read book Gyrokinetic Particle Simulations of Reversed Shear Alfvén Eigenmodes in Fusion Plasmas written by Wenjun Deng and published by . This book was released on 2011 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nonlinear gyrokinetic simulation model, which recovers the ideal magnetohydrodynamic (MHD) theory in the linear long-wavelength regime is formulated for studying kinetic MHD processes in magnetized plasmas. This comprehensive formulation enables gyrokinetic simulation of both pressure gradient-driven and current-driven instabilities including ideal and kinetic ballooning modes, kink modes, and shear Alfvén waves, as well as their nonlinear interactions in multi-scale simulations. Implemented in the gyrokinetic toroidal code (GTC), the new formulation is verified in simulations of reversed shear Alfvén eigenmode (RSAE) in fusion plasmas. The antenna excitation of RSAE provides verifications of its mode structure, frequency and damping rate from the initial perturbation simulation with kinetic thermal ions. When excited by fast ions, their non-perturbative contributions modify the mode structure relative to the ideal MHD theory. With inclusion of thermal plasma pressure, the mode frequency increases due to the elevation of the Alfvén continuum by the geodesic compressibility. The GTC simulations have been benchmarked with extended hybrid MHD-gyrokinetic simulations. The verified gyrokinetic simulation model is applied to studying the linear properties of RSAE driven by density gradient of neutral beam injected fast ions in a well-diagnosed DIII-D tokamak experiment (discharge #142111). GTC simulations find that weakly damped RSAE exists due to toroidal coupling and other geometric effects. Various damping and driving mechanisms are identified and measured in the simulations, which shows that accurate damping and growth rate calculation requires true mode structure from non-perturbative, fully self-consistent simulation. The mode structure has no up-down symmetry mainly due to the radial symmetry breaking by the radial variation of fast ion density gradient, as measured in the experiment by electron cyclotron emission imaging. The RSAE frequency up-sweeping and the mode transition from RSAE to toroidal Alfvén eigenmode are in good agreement with the experimental results when scanning the values of the minimum safety factor in simulations. Good agreements in frequencies, growth rates, and mode structures are obtained among simulations of gyrokinetic codes GTC and GYRO, and an MHD-hybrid code TAEFL, which provide further verification and validation of the gyrokinetic model for simulating the kinetic MHD processes. As a prelude to nonlinear simulations of RSAE and associated fast ion transport, properties of microturbulence in reversed shear plasmas are also studied.
Book Synopsis A Theory of Fast Wave Absorption, Transmission and Reflection in the Ion Cyclotron Range of Frequencies by : Chris Lashmore-Davies
Download or read book A Theory of Fast Wave Absorption, Transmission and Reflection in the Ion Cyclotron Range of Frequencies written by Chris Lashmore-Davies and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Gyrokinetic Equations for Low-frequency Electromagnetic Waves in General Plasma Equilibria by :
Download or read book Nonlinear Gyrokinetic Equations for Low-frequency Electromagnetic Waves in General Plasma Equilibria written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A nonlinear gyrokinetic formalism for low-frequency (less than the cyclotron frequency) microscopic electromagnetic perturbations in general magnetic field configurations is developed. The nonlinear equations thus derived are valid in the strong-turbulence regime and contain effects due to finite Larmor radius, plasma inhomogeneities, and magentic field geometries. The specific case of axisymmetric tokamaks is then considered, and a model nonlinear equation is derived for electrostatic drift waves. Also, applying the formalism to the shear Alfven wave heating sceme, it is found that nonlinear ion Landau damping of kinetic shear-Alfven waves is modified, both qualitatively and quantitatively, by the diamagnetic drift effects. In particular, wave energy is found to cascade in wavenumber instead of frequency.
Download or read book Science Abstracts written by and published by . This book was released on 1992 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ICRF Wave Propagation and Absorption in Plasmas with Non-thermal Populations by : R. J. Dumont
Download or read book ICRF Wave Propagation and Absorption in Plasmas with Non-thermal Populations written by R. J. Dumont and published by . This book was released on 2002 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gyrokinetic Particle Simulation Model by :
Download or read book Gyrokinetic Particle Simulation Model written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new type of particle simulation model based on the gyrophase-averaged Vlasov and Poisson equations is presented. The reduced system, in which particle gyrations are removed from the equations of motion while the finite Larmor radius effects are still preserved, is most suitable for studying low frequency microinstabilities in magnetized plasmas. It is feasible to simulate an elongated system (L/sub parallel/” L/sub perpendicular/) with a three-dimensional grid using the present model without resorting to the usual mode expansion technique, since there is essentially no restriction on the size of .delta.x/sub parallel/ in a gyrokinetic plasma. The new approach also enables us to further separate the time and spatial scales of the simulation from those associated with global transport through the use of multiple spatial scale expansion. Thus, the model can be a very efficient tool for studying anomalous transport problems related to steady-state drift-wave turbulence in magnetic confinement devices. It can also be applied to other areas of plasma physics.
Book Synopsis Hot-ion Bernstein Wave with Large K{sub Parallel} by :
Download or read book Hot-ion Bernstein Wave with Large K{sub Parallel} written by and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complex roots of the hot plasma dispersion relation in the ion cyclotron range of frequencies have been surveyed. Progressing from low to high values of perpendicular wave number k(up tack) we find first the cold plasma fast wave and then the well-known Bernstein wave, which is characterized by large dispersion, or large changes in k(up tack) for small changes in frequency or magnetic field. At still higher k(up tack) there can be two hot plasma waves with relatively little dispersion. The latter waves exist only for relatively large k(parallet to), the wave number parallel to the magnetic field, and are strongly damped unless the electron temperature is low compared to the ion temperature. Up to three mode conversions appear to be possible, but two mode conversions are seen consistently.
