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Author(s):
T.Yamagishi
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Title:
Electrostatic Drift Mode in Toroidal Plasma with Minority Energetic Particles
Date of publication:
Feb. 1991
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Key words:
Electrostatic drift wave, toroidal propagator, tokamak, toroidal resonance, finite Larmor radius effect, energetic ions, temperature inhomogeniety, growth rate, shear damping
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Abstract:
The electrostatic drift wave theory is developed in the toroidal plasma with minority energetic particles and temperature inhomogenieties by taking into account the global toroidal gyromotion and arbitrary Larmor radius effect of particle making use of the toroidal propagator. When the toroidal eigenmode equation is approximated by the Weber type function, the dispersion relation indicates that the toroidal effect strongly destabilizes the ion drift mode even in uniform temperature plasmas. The electrostatic toroidal drift ion mode is insensitive to the presence of energetic ions with the Maxwellian distribution except small Larmor radius and small toroidal effects cases (cylindrical fluid like plasmas) , in which the mode is stabilized by the energetic ions.
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