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Orbital spectrum analysis of non-axisymmetric perturbations of the guiding-center particle motion in axisymmetric equilibria
被引:4
|作者:
Zestanakis, P. A.
[1
]
Kominis, Y.
[2
]
Anastassiou, G.
[1
]
Hizanidis, K.
[1
]
机构:
[1] Natl Tech Univ Athens, Sch Elect & Comp Engn, Athens, Greece
[2] Natl Tech Univ Athens, Sch Appl Math & Phys Sci, Athens, Greece
关键词:
TRANSPORT;
SIMULATION;
DIFFUSION;
D O I:
10.1063/1.4943871
中图分类号:
O35 [流体力学];
O53 [等离子体物理学];
学科分类号:
070204 ;
080103 ;
080704 ;
摘要:
The presence of non-axisymmetric perturbations in an axisymmetric magnetic field equilibrium renders the Guiding Center (GC) particle motion non-integrable and may result in particle, energy, and momentum redistribution, due to resonance mechanisms. We analyse these perturbations in terms of their spectrum, as observed by the particles in the frame of unperturbed GC motion. We calculate semi-analytically the exact locations and strength of resonant spectral components of multiple perturbations. The presented Orbital Spectrum Analysis method is based on an exact Action-Angle transform that fully takes into account Finite Orbit Width effects. The method provides insight into the particle dynamics and enables the prediction of the effect of any perturbation to all different types of particles and orbits in a given, analytically or numerically calculated, axisymmetric equilibrium.
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页数:8
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