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On Resonant Excitations Of High N Magnetohydrodynamic Modes By Energetic Alpha Particles In Tokamaks
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Book Synopsis On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic/alpha Particles in Tokamaks by : Liu Chen
Download or read book On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic/alpha Particles in Tokamaks written by Liu Chen and published by . This book was released on 1989 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic/alpha Particles in Tokamaks by :
Download or read book On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic/alpha Particles in Tokamaks written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical theories for the excitations in tokamaks of magnetohydrodynamic (MHD) modes with large toroidal mode numbers (n”1) are presented. Specifically, only instability mechanisms due to resonances with energetic ions/alpha particles are considered. It is noted that, while trapped energetic particles contribute to the ideal region, circulating energetic particles contribute mainly to the singular layer dynamics. A unified dispersion relation manifesting both fishbone-like modes and beam transit-resonance modes is then driven. Finally, we also analyze the stability property of toroidicity-induced shear Alfven waves excited via transit resonances with alpha particles in ignited tokamaks. 11 refs.
Book Synopsis On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic by :
Download or read book On Resonant Excitations of High-n Magnetohydrodynamic Modes by Energetic written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical theories for the excitations in tokamaks of magnetohydrodynamic (MHD) modes with large toroidal mode numbers (n”1) are presented. Specifically, only instability mechanisms due to resonances with energetic ions/alpha particles are considered. It is noted that, while trapped energetic particles contribute to the ideal region, circulating energetic particles contribute mainly to the singular layer dynamics. A unified dispersion relation manifesting both fishbone-like modes and beam transit-resonance modes is then driven. Finally, we also analyze the stability property of toroidicity-induced shear Alfven waves excited via transit resonances with alpha particles in ignited tokamaks. 11 refs.
Book Synopsis Theory of Resistive Magnetohydrodynamic Instabilities Excited by Energetic-trapped Particles in Large-size Tokamaks by :
Download or read book Theory of Resistive Magnetohydrodynamic Instabilities Excited by Energetic-trapped Particles in Large-size Tokamaks written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is shown that, in present-day large-size tokamaks, finite resistivity modifies qualitatively the stability properties of magnetohydrodynamic instabilities resonantly excited by the unfavorable processional drift of energetic-trapped particles, i.e., the so-called ''fishbone''-type instabilities. Specifically, it is found that (1) the n = 1 energetic-trapped particle-induced internal kink (''fishbone'') instability is strongly stabilized by resistive dissipation and (2) finite resistivity lowers considerably the threshold conditions for resonant excitations of high-n ballooning/interchange modes. The possibility of exciting fishbones by alpha particles in ignition experiments is also considered.
Book Synopsis Excitation of High-n Toroidicity-induced Shear Alfven Eigenmodes by Energetic Particles and Fusion Alpha Particles in Tokamaks by :
Download or read book Excitation of High-n Toroidicity-induced Shear Alfven Eigenmodes by Energetic Particles and Fusion Alpha Particles in Tokamaks written by and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stability of high-n toroidicity-induced shear Alfven eigenmodes (TAE) in the presence of fusion alpha particles or energetic ions in tokamaks is investigated. The TAE modes are discrete in nature and thus can easily tap the free energy associated with energetic particle pressure gradient through wave particle resonant interaction. A quadratic form is derived for the high-n TAE modes using gyro-kinetic equation. The kinetic effects of energetic particles are calculated perturbatively using the ideal MHD solution as the lowest order eigenfunction. The finite Larmor radius (FLR) effects and the finite drift orbit width (FDW) effects are included for both circulating and trapped energetic particles. It is shown that, for circulating particles, FLR and FDW effects have two opposite influences on the stability of the high-n TAE modes. First, they have the usual stabilizing effects by reducing the wave particle interaction strength. Second, they also have destabilizing effects by allowing more particles to resonate with the TAE modes. It is found that the growth rate induced by the circulating alpha particles increase linearly with toroidal mode number n for small?{sub?}?{sub?}, and decreases as 1/n for?{sub?}?{sub?} {much gt} 1. The maximum growth rate is obtained at?{sub?}?{sub?} on the order of unity and is nearly constant for the range of 0.7
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Unified Theory of Resonant Excitation of Kinetic Ballooning Modes by Energetic Ions/alpha Particles in Tokamaks by : Hamid Biglari
Download or read book A Unified Theory of Resonant Excitation of Kinetic Ballooning Modes by Energetic Ions/alpha Particles in Tokamaks written by Hamid Biglari and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory of Kinetic Ballooning Modes Excited by Energetic Particles in Tokamaks by :
Download or read book Theory of Kinetic Ballooning Modes Excited by Energetic Particles in Tokamaks written by and published by . This book was released on 1993 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have analyzed theoretically the resonant excitations of kinetic ballooning modes (KBM) by the energetic ions/alpha particles in tokamaks. Our theory includes finite-size orbit effects of both circulating and trapped particles. With energetic-particle contributions suppressed in the singular inertial layer, an analytic.dispersion relation can then be derived via an asymptotic matching analysis. The dispersion relation, in particular, demonstrates the existence of two types of modes; that is, the magnetohydrodynamic (MHD) gap mode and the energetic-particle continuum mode. Specific expressions for real frequencies, growth rates and threshold conditions are also derived for a model slowing-down beam ion distribution function.
Book Synopsis Theory of Energetic/alpha Particle Effects on Magnetohydrodynamic Modes in Tokamaks by :
Download or read book Theory of Energetic/alpha Particle Effects on Magnetohydrodynamic Modes in Tokamaks written by and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Excitation of High-n Toroidicity-induced Shear Alfven Eigenmodes by Energetic Particles and Fusion Alpha Particles in Tokamaks by : C. Z. Cheng
Download or read book Excitation of High-n Toroidicity-induced Shear Alfven Eigenmodes by Energetic Particles and Fusion Alpha Particles in Tokamaks written by C. Z. Cheng and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of High Energy Particles in Toroidal Systems by : Toshiki Tajima
Download or read book Physics of High Energy Particles in Toroidal Systems written by Toshiki Tajima and published by Springer. This book was released on 1994 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation US and Japanese physicists from SSC accelerator, space, tokamak, and alternative fusion physics discuss the physical effects that are wrought on a plasma or a beam by the presence of high energy or energetic particles. The 23 papers cover generic processes involving high energy particles, ignited tokamaks, helical systems, field reversed configurations, and systems with large orbit particles. Reproduced from typescripts, some double spaced. Annotation c. by Book News, Inc., Portland, Or.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1987 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetohydrodynamic Stability of Tokamaks by : Hartmut Zohm
Download or read book Magnetohydrodynamic Stability of Tokamaks written by Hartmut Zohm and published by John Wiley & Sons. This book was released on 2014-11-24 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book bridges the gap between general plasma physics lectures and the real world problems in MHD stability. In order to support the understanding of concepts and their implication, it refers to real world problems such as toroidal mode coupling or nonlinear evolution in a conceptual and phenomenological approach. Detailed mathematical treatment will involve classical linear stability analysis and an outline of more recent concepts such as the ballooning formalism. The book is based on lectures that the author has given to Master and PhD students in Fusion Plasma Physics. Due its strong link to experimental results in MHD instabilities, the book is also of use to senior researchers in the field, i.e. experimental physicists and engineers in fusion reactor science. The volume is organized in three parts. It starts with an introduction to the MHD equations, a section on toroidal equilibrium (tokamak and stellarator), and on linear stability analysis. Starting from there, the ideal MHD stability of the tokamak configuration will be treated in the second part which is subdivided into current driven and pressure driven MHD. This includes many examples with reference to experimental results for important MHD instabilities such as kinks and their transformation to RWMs, infernal modes, peeling modes, ballooning modes and their relation to ELMs. Finally the coverage is completed by a chapter on resistive stability explaining reconnection and island formation. Again, examples from recent tokamak MHD such as sawteeth, CTMs, NTMs and their relation to disruptions are extensively discussed.
Book Synopsis Alpha-particle Effects on High-n Instabilities in Tokamaks by :
Download or read book Alpha-particle Effects on High-n Instabilities in Tokamaks written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot .cap alpha.-particles and thermalized helium ash particles in tokamaks can have significant effects on high toroidal mode number instabilities such as the trapped-electron drift mode and the kinetically calculated magnetohydrodynamic ballooning mode. In particular, the effects can be stabilizing, destabilizing, or negligible, depending on the parameters involved. In high-temperature tokamaks capable of producing significant numbers of hot .cap alpha.-particles, the predominant interaction of the mode with the .cap alpha.-particles is through resonances of various sorts. In turn, the modes can cause significant anomalous transport of the .cap alpha.-particles and the helium ash. Here, results of comprehensive linear eigenfrequency-eigenfunction calculations are presented for relevant realistic cases to show these effects. 24 refs., 12 figs., 6 tabs.
Book Synopsis On Resonant Destabilization of Toroidal Alfven Eigenmodes by Circulating and Trapped Energetic Ions/alpha Particles in Tokamaks by : Hamid Biglari
Download or read book On Resonant Destabilization of Toroidal Alfven Eigenmodes by Circulating and Trapped Energetic Ions/alpha Particles in Tokamaks written by Hamid Biglari and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory of Fusion Plasmas by : J. Vaclavik
Download or read book Theory of Fusion Plasmas written by J. Vaclavik and published by . This book was released on 1989 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Energy Update written by and published by . This book was released on 1982-04 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
