Ion Heating by Fast Particle Induced Alfvin Turbulence | Zendy

D. Gates | Zendy; Н. Н. Гореленков | Zendy; and R.B. White | Zendy

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Ion Heating by Fast Particle Induced Alfvin Turbulence

Author(s) -

D. Gates,

Н. Н. Гореленков,

and R.B. White

Publication year - 2001

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/786534

Subject(s) - ion , atomic physics , turbulence , physics , plasma , range (aeronautics) , excitation , excited state , particle (ecology) , thermal , diffusion , computational physics , materials science , mechanics , nuclear physics , thermodynamics , quantum mechanics , oceanography , composite material , geology

A novel mechanism that directly transfers energy from Super-Alfvenic energetic ions to thermal ions in high-beta plasmas is described. The mechanism involves the excitation of compressional Alfvin eigenmodes (CAEs) in the frequency range with omega less than or approximately equal to omega(subscript ci). The broadband turbulence resulting from the large number of excited modes causes stochastic diffusion in velocity space, which transfers wave energy to thermal ions. This effect may be important on the National Spherical Torus Experiment (NSTX), and may scale up to reactor scenarios. This has important implications for low aspect ratio reactor concepts, since it potentially allows for the modification of the ignition criterion

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