Journal ArticleDOI
Nonlinear dragging of particles during high-frequency heating
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TLDR
The total longitudinal force which acts on a high-frequency heated plasma column is derived for any arbitrary absorption mechanism as mentioned in this paper, which results in particle drifts and poloidal fields which may be relevant to toroidal plasma confinement.Abstract:
The total longitudinal force which acts on a high-frequency heated plasma column is derived for any arbitrary absorption mechanism. This force arises from any departure from longitudinal symmetry (longitudinal plasma motion, a single travelling wave, etc.). It results in particle drifts and poloidal fields which may be relevant to toroidal plasma confinement. High-frequency power of order 105 W is sufficient to replace the driving electric field in a moderate scale tokamak.read more
Citations
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Observation of lower-hybrid-current drive in the JIPP T-II torus
Kunizo Ohkubo,Shuichi Takamura,Kazuo Kawahata,T. Tetsuka,Kiyokata Matsuura,Nobuaki Noda,K. Sakurai,S. Tanahashi,Junji Fujita +8 more
TL;DR: In this article, it was confirmed that RF-driven current is generated by momentum transfer from lower hybrid waves to suprathermal electrons with an energy of 8-25 keV.
Journal Article
Observation of lower hybrid current drive in the jipp t-ii torus
Kunizo Ohkubo,Shuichi Takamura,Kazuo Kawahata,T. Tetsuka,Kiyokata Matsuura,Nobuaki Noda,K. Sakurai,S. Tanahashi,Junji Fujita +8 more
TL;DR: In this paper, it was confirmed that RF-driven current is generated by momentum transfer from lower hybrid waves to suprathermal electrons with an energy of 8-25 keV.
Journal ArticleDOI
High-frequency heating of plasma with two ion species
TL;DR: In this paper, the authors considered the penetration of electromagnetic waves with a frequency of the order of the ion cyclotron frequencies and with a fixed longitudinal wave number k||, so that N|| = k||cω 1 deep into an inhomogeneous plasma with two ion species.
Journal ArticleDOI
Current Sustaining by RF Travelling Field in a Collisional Toroidal Plasma
Masaji Fukuda,Kiyokata Matsuura +1 more
TL;DR: In this paper, the relation between the current generated by RF travelling field and the absorbed power is studied in a collisional toroidal plasma, parameters being phase velocity and filling gas pressure or electron collision frequency.
Journal ArticleDOI
Fluid description of particle transport in HF heated magnetized plasma
TL;DR: In this paper, an analysis of particle fluxes averaged over high frequency oscillations is presented, where collisional effects and kinetic mechanisms of energy absorption are included, and explicit expressions for steady state fluxes are given in terms of electromagnetic field quantities.
References
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Journal ArticleDOI
The peristaltic Tokamak
TL;DR: The Direct Current Tokamak (DCT) as discussed by the authors is one of the more successful devices on the road to controlled fusion, and it has been shown that it can be maintained indefinitely.
Journal ArticleDOI
Interaction of Travelling Magnetic Fields with Ionized Gases
TL;DR: In this paper, the magnetic field associated with an electromagnetic wave propagated along a conducting helix has been used for accelerating electrons in the direction of propagation of the wave, which is called magnetic magnetic acceleration.
Journal ArticleDOI
Resonant Interactions between Particles and Normal Modes in a Cylindrical Plasma
TL;DR: In this article, a plasma configuration with cylindrical symmetry is studied, containing axial and azimuthal magnetic fields and radial electric field, with arbitrary radial variation, and the particle motion is parameterized by three exact action invariants: radial action, canonical angular momentum, and canonical axial momentum; in the limit of small gyroradius they are equivalent to magnetic moment, radial guiding center position, and parallel velocity.
Journal ArticleDOI
Observation of Collisionless Electron Heating by Ion Cyclotron Waves
S. Yoshikawa,H. Yamato +1 more
TL;DR: In this paper, a dc electric current was observed when the wave was allowed to propagate in one direction, suggesting that the momentum of the wave is transmitted to electrons by Landau damping.