Phase-space dynamics of Alfvén mode chirping
نویسندگان
چکیده
منابع مشابه
On the structure of wave-particle interactions and nonlinear Alfvénic fluctuation dynamics
Nonlinear dynamics, such as saturation and frequency chirping of Alfvénic fluctuations driven by energetic particles are investigated by means of the nonlinear hybrid magnetohydrodynamics gyrokinetic code (XHMGC). Saturation mechanism due to resonance detuning and/or radial decoupling are discussed. It will be shown that saturation field level exhibits a quadratic scaling with the growth rate, ...
متن کاملNonlinear frequency oscillation of Alfvén eigenmodes in fusion plasmas.
A nonlinear oscillation of frequency and amplitude is found by massively parallel gyrokinetic simulations of Alfvén eigenmodes excited by energetic particles in toroidal plasmas. The fast and repetitive frequency chirping is induced by the evolution of coherent structures in the phase space. The dynamics of the coherent structures is controlled by the competition between the phase-space island ...
متن کاملDynamics as Shadow of Phase Space Geometry
Starting with the generally well accepted opinion that quantizing an arbitrary Hamiltonian system involves picking out some additional structure on the classical phase space (the shadow of quantummechanics in the classical theory), we describe classical as well as quantum dynamics as a purely geometrical effect by introducing a phase space metric structure. This produces an O(h̄) modification of...
متن کاملPhase-space Lagrangian dynamics of incompressible thermofluids
Phase-space Lagrangian dynamics in ideal fluids (i.e, continua) is usually related to the so-called ideal tracer particles. The latter, which can in principle be permitted to have arbitrary initial velocities, are understood as particles of infinitesimal size which do not produce significant perturbations of the fluid and do not interact among themselves. An unsolved theoretical problem is the ...
متن کاملPhase space dynamics of overdamped quantum systems
The phase space dynamics of dissipative quantum systems in strongly condensed phase is considered. Based on the exact path integral approach it is shown that the Wigner transform of the reduced density matrix obeys a time evolution equation of Fokker-Planck type valid from high down to very low temperatures. The effect of quantum fluctuations is discussed and the accuracy of these findings is t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2020
ISSN: 1070-664X,1089-7674
DOI: 10.1063/5.0004610