Results 191 to 200 of about 1,463,568 (229)

Dynamics of the Sawtooth Collapse in Tokamak Plasmas

Physical Review Letters, 1994
Fast reconnection such as driven by electron inertia qualitatively changes the Kadomtsev picture of the sawtooth collapse in tokamak discharges. The collapse occurs in two steps, a fast Kadomtsev-type reconnection followed by a rapid reformation of a ${q}_{0}l1$ configuration.
Biskamp, D., Drake, J.
openaire   +3 more sources

Drift Eigenmodes in Rotating Tokamak Plasma

Physica Scripta, 2003
Summary: The effects of sheared plasma rotation on the toroidal drift eigenmodes are studied for an axisymmetric, large aspect-ratio tokamak with concentric, circular magnetic surfaces. The performed analysis is based on a consistent derivation of the drift eigenmode equations, which are coupled in the poloidal mode numbers due to toroidicity ...
Sandberg, Ingmar, Pavlenko, Vladimir P., Revenchuk, Sergey M.   +2 more
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Plasma transport in tokamaks

Plasma Physics and Controlled Fusion, 1993
The mechanism of high-power island pumping recently proposed by Kadomtsev, combined with the constraint that the plasma magnetic configuration of the tokamak is associated, under ohmic relaxation, with a stationary magnetic entropy (isoentropic state), allows the derivation of the ITER89-P scaling of the confinement time with considerable precision ...
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Waves and Turbulence in a Tokamak Fusion Plasma

Science, 1983
The tokamak is a prototype fusion device in which a toroidal magnetic field is used to confine a hot plasma. Coherent waves, excited near the plasma edge, can be used to transport energy into the plasma in order to heat it to the temperatures required for thermonuclear fusion.
C M, Surko, R E, Slusher
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The Control of Tokamak Configuration Variable Plasmas

Fusion Technology, 1997
AbstractThe general control of tokamak plasmas has evolved considerably over the past few years with an increase in the plasma pulse length, an increase in the control of additional heating and fueling, and an increase in the degree to which the shape of the plasma can be varied.
Lister, J. B., Hofmann, F., Moret, J. M., Buhlmann, F., Dutch, M. J., Fasel, D., Favre, A., Isoz, P. F., Marletaz, B., Marmillod, P., Martin, Y., Perez, A., Ward, D. J.   +12 more
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Plasma Equilibrium in Tokamak

2015
Plasma equilibrium is the state of force balance and is fundamental to understand charged particle orbit and the neoclassical transport, collective phenomena and MHD stability in the toroidal plasma. After introduction of topology of the magnetic confinement bottle in Sect.
Mitsuru Kikuchi, Masafumi Azumi
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Plasma transport in tokamaks

Nuclear Fusion, 1991
A new theoretical approach to plasma transport in tokamaks is proposed which takes into account the marginally stochastic behaviour of both ions and electrons in a magnetic configuration with broken symmetry. Magnetic noise is damped by electrons and is pumped up by ions via electrostatic fluctuations.
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Rotation of Tokamak Plasmas by Alfvén Waves

Astrophysics and Space Science, 1997
Rotational motions of tokamak plasmas play an important role in the efficiency of plasma confinement. A way to induce such motions is to apply external Alfvén waves to a collisional plasma which can absorb these waves. The authors study how the excited poloidal end toroidal velocity components of plasma depend on the ponderomotive radio-frequency force
Tsypin, V. S., Elfimov, A. G., De Azevedo, C. A., de Assis, A. S.   +3 more
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Tokamak plasma diagnostics

Nuclear Fusion, 1978
Tokamak plasma diagnostics is reviewed. Subjects are classified according to the physical quantities to be measured. Instrumental techniques and theoretical considerations are developed at length only when the development in question is relatively new. Present trends are emphasized, as well as diagnostic limitations and needs for future large tokamaks.
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Fluctuations in a tokamak plasma

1978
An experimental investigation of low frequency floating potential fluctuations (f ≤ 200 kHz) in a research tokamak plasma using two spatially separated electrostatic probes has been performed. The spectra, correlation length, and the phase velocity of the fluctuations in both the radial and azimuthal direction have been determined.
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