Publication

Low-Frequency Turbulence in a Linear Magnetized Plasma

Paolo Ricci
2010
Journal Articles

Résumé

Plasma turbulence in a linear device is explored for the first time with three-dimensional global twofluid simulations, focusing on the plasma parameters of the Large Plasma Device. Three instabilities are present in the simulations: the Kelvin-Helmholtz instability, a sheath-driven instability, and a resistive drift wave instability. The Kelvin-Helmholtz mode is shown to dominate the transport of plasma across the magnetic field. Simple scaling laws are obtained for the plasma profiles.

Source officielle

https://infoscience.epfl.ch/entities/publication/eeb9fe5d-2e80-4793-930b-b2181a5142af

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Paolo Ricci
2010
Journal Articles

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/eeb9fe5d-2e80-4793-930b-b2181a5142af

À propos de ce résultat

Concepts associés (24)

Focalisateur de plasma dense

Un focalisateur de plasma dense (en anglais dense plasma focus, abrégé DPF), est un appareil qui, par accélération et compression électromagnétiques, donne naissance à un cordon de plasma à vie courte qui produit, grâce aux températures et densités très élevées qu'il atteint, une abondance de rayonnements multiples. Sa conception, qui date du début des années 1960, est due à la fois à l'Américain J.W. Mather et au Russe N.V. Filippov, qui l'ont inventé parallèlement et indépendamment l'un de l'autre.

Plasma stability

The stability of a plasma is an important consideration in the study of plasma physics. When a system containing a plasma is at equilibrium, it is possible for certain parts of the plasma to be disturbed by small perturbative forces acting on it. The stability of the system determines if the perturbations will grow, oscillate, or be damped out. In many cases, a plasma can be treated as a fluid and its stability analyzed with magnetohydrodynamics (MHD).

Double layer (plasma physics)

A double layer is a structure in a plasma consisting of two parallel layers of opposite electrical charge. The sheets of charge, which are not necessarily planar, produce localised excursions of electric potential, resulting in a relatively strong electric field between the layers and weaker but more extensive compensating fields outside, which restore the global potential. Ions and electrons within the double layer are accelerated, decelerated, or deflected by the electric field, depending on their direction of motion.

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