Neuware -In fusion plasmas, generated from heating sources or fusion products, energetic particles can excite Alfv�n eigenmodes, which undermines energetic particle confinement. To reduce or avoid this problem, behaviors of energetic particles and Alfv�n eigenmodes need to be studied in detail. In this book, 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 Alfv�n 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 Alfv�n eigenmode (RSAE). The verified model is then 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.Books on Demand GmbH, �berseering 33, 22297 Hamburg 148 pp. Englisch.

Bestandsnummer des Verk�ufers 9783659168864

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Titel: Simulations of reversed shear Alfv�n eigenmodes in fusion plasmas
Verlag: LAP Lambert Academic Publishing Jul 2012
Ver�ffentlichungsdatum: 2012
Sprache: Englisch
ISBN-10: 3659168866
ISBN-13: 9783659168864
Bindung: Taschenbuch
Zustand: Neu

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In fusion plasmas, generated from heating sources or fusion products, energetic particles can excite Alfv�n eigenmodes, which undermines energetic particle confinement. To reduce or avoid this problem, behaviors of energetic particles and Alfv�n eigenmodes need to be studied in detail. In this book, 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 Alfv�n 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 Alfv�n eigenmode (RSAE). The verified model is then 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.

�ber die Autorin bzw. den Autor

Wenjun Deng is currently an Associate Research Physicist at Princeton Plasma Physics Laboratory. His research interests are in the area of fusion plasma modeling and large scale computer simulation. He obtained his B.S. from University of Science and Technology of China in 2006 and his Ph.D. from University of California, Irvine in 2012.

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