Theory of high-power cyclotron-resonance heating in an inhomogeneous magnetic field

Journal Article · Sun Mar 15 04:00:00 EST 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.3920· OSTI ID:7205616

Sugihara, R ^[1]; Ogawa, Y ^[2]

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1. Plasma Science Center, Nagoya University, Nagoya 464-01 (Japan)
2. National Institute for Fusion Science, Nagoya 464-01 (Japan)

Wave-energy absorption of a plasma due to cyclotron harmonic resonance is evaluated analytically and by a simulation. The static magnetic field is characterized with {bold B}{center dot}{del}{ital B}=0, and a longitudinal wave is supposed to propagate across the magnetic field. In the calculation an orbit modification of the cyclotron motion of particles is taken into account. It is found that the absorption for the fundamental harmonic resonance ({ital m}=1) is depressed from that of the conventional linear theory while the absorptions for {ital m}{ge}2 are enhanced, where {ital m} is the harmonic number. The enhancement is significant when {ital k}{rho}{sub {ital t}}{much lt}1 ({ital k} the perpendicular wave number and {rho}{sub {ital t}} the gyroradius of the thermal particle) and when the interaction time between the plasma particles and the wave exceeds a critical value that is obtainable analytically. For all {ital m} and {ital k}{rho}{sub {ital t}}, there appear peaks or saturations in the time evolution of the absorbed energy.

• OSTI ID: 7205616
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:6; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
ANALYTICAL SOLUTION
COMPUTERIZED SIMULATION
CYCLOTRON RESONANCE
DIFFERENTIAL EQUATIONS
ELECTRIC FIELDS
EQUATIONS
EQUATIONS OF MOTION
HARMONICS
HEATING
NONLINEAR PROBLEMS
OSCILLATIONS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA HEATING
RESONANCE
SIMULATION