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1991•Physics of Fluids B Plasma PhysicsRequires access

Trapped ion nonlocal effect in ion cyclotron radio-frequency heating

Yan Ping Chen, Shih Tung Tsai

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Abstract

A general formula for the nonlocal absorption power of trapped ions averaged over a magnetic surface in ion cyclotron radio-frequency (ICRF) heating is derived. The gyrokinetic equation is adopted and a full particle orbit and wave coupling are kept. The resulting expression for a Maxwellian plasma in tokamaks is compared with Stix’s theory [Nucl. Fusion 15, 737(1975)], which shows that Stix’s theory is rather good for the fundamental cyclotron frequency heating and the nonlocal effect is not negligible for the second-harmonic cyclotron frequency heating.

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A general formula for the nonlocal absorption power of trapped ions averaged over a magnetic surface in ion cyclotron radio-frequency (ICRF) heating is derived. The gyrokinetic equation is adopted and a full particle orbit and wave coupling are kept. The resulting expression for a Maxwellian plasma in tokamaks is compared with Stix’s theory [Nucl. Fusion 15, 737(1975)], which shows that Stix’s theory is rather good for the fundamental cyclotron frequency heating and the nonlocal effect is not negligible for the second-harmonic cyclotron frequency heating.

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Available abstract

A general formula for the nonlocal absorption power of trapped ions averaged over a magnetic surface in ion cyclotron radio-frequency (ICRF) heating is derived. The gyrokinetic equation is adopted and a full particle orbit and wave coupling are kept. The resulting expression for a Maxwellian plasma in tokamaks is compared with Stix’s theory [Nucl. Fusion 15, 737(1975)], which shows that Stix’s theory is rather good for the fundamental cyclotron frequency heating and the nonlocal effect is not negligible for the second-harmonic cyclotron frequency heating.

Key concepts: Cyclotron, Tokamak, Physics, Ion cyclotron resonance, Atomic physics, Ion, Harmonic, Plasma

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