Zobrazeno 1 - 10
of 464
pro vyhledávání: '"Qiu, Zhiyong"'
The indirect nonlinear interactions between toroidal Alfv\'en eigenmode (TAE) and ion temperature gradient mode (ITG) are investigated using nonlinear gyrokinetic theory and ballooning mode formalism. More specifically, the local nonlinear ITG mode e
Externí odkaz:
http://arxiv.org/abs/2408.15782
The self-consistent nonlinear interaction of drift wave (DW) and zonal flow (ZF) is investigated using nonlinear gyrokinetic theory, with both spontaneous excitation and beat-driven of ZF by DW treated on the same footing. DW solitons are formed in t
Externí odkaz:
http://arxiv.org/abs/2408.05983
Effects of plasma nonuniformity on zero frequency zonal structure (ZFZS) excitation by drift Alfven wave (DAW) instabilities in toroidal plasmas are investigated using nonlinear gyrokinetic theory. The governing equations describing nonlinear interac
Externí odkaz:
http://arxiv.org/abs/2408.00324
A nonlinear saturation mechanism for reversed shear Alfven eigenmode (RSAE) is proposed and analysed, and is shown to be of relevance to typical reactor parameter region. The saturation is achieved through the generation of high-frequency quasi-mode
Externí odkaz:
http://arxiv.org/abs/2406.05731
A workflow is developed based on the ideal MHD model to investigate the linear physics of various Alfv\'en eigenmodes in general axisymmetric toroidal geometry, by solving the coupled shear Alfv\'en wave (SAW) and ion sound wave (ISW) equations in ba
Externí odkaz:
http://arxiv.org/abs/2404.06296
Using the slab plasma as a paradigm model, we have derived analytically equations for the nonlinear generation of zero-frequency zonal flows by electron drift waves including, on the same footing, both the beat-driven and spontaneous excitations. It
Externí odkaz:
http://arxiv.org/abs/2402.07399
In this work, gyrokinetic theory of drift waves (DWs) self-regulation via the forced driven zonal flow (ZF) is presented, and finite diamagnetic drift frequency due to plasma nonuniformity is shown to play dominant role in ZF forced generation. The o
Externí odkaz:
http://arxiv.org/abs/2402.07390
The parametric decay of toroidal Alfv\'en eigenmode (TAE) in nonuniform plasmas is investigated using nonlinear gyrokinetic equation. It is found that, the plasma nonuniformity not only significantly enhances the nonlinear coupling cross-section, but
Externí odkaz:
http://arxiv.org/abs/2401.07507
A general equation describing the resonant nonlinear mode-coupling among kinetic Alfv\'en waves (KAWs) is derived using nonlinear gyrokinetic theory, which can be applied to study the potentially strong spectral energy transfer of KAWs. As a first ap
Externí odkaz:
http://arxiv.org/abs/2401.02711
Core localized alpha-channeling via low frequency Alfven mode generation in reversed shear scenarios
A novel channel for fuel ions heating in tokamak core plasma is proposed and analyzed using nonlinear gyrokinetic theory. The channel is achieved via spontaneous decay of reversed shear Alfv\'en eigenmode (RSAE) into low frequency Alfv\'en modes (LFA
Externí odkaz:
http://arxiv.org/abs/2307.04388