Publication

Direct Measurement of the Damping of Toroidicity-Induced Alfven Eigenmodes

Ambrogio Fasoli, Jonathan Bryan Lister, Jean-Marc Moret, Philippe Marmillod, Pierre Lavanchy
1995
Journal Articles

Abstract

This Letter presents the first direct experimental measurements of the damping of toroidicity-induced Alfven eigenmodes (TAE), carried out in the JET tokamak. These measurements were obtained during the first experiments to drive these modes with antennas external to a tokamak plasma. Different regimes corresponding to different dominant TAE absorption mechanisms with a wide range of damping rates, 10(-3) less than or equal to gamma/omega less than or equal to 10(-1), have been identified in Ohmically heated plasma discharges.

Official source

https://infoscience.epfl.ch/entities/publication/73ae0414-f716-42ee-90c8-3f307cc16271

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Ambrogio Fasoli, Jonathan Bryan Lister, Jean-Marc Moret, Philippe Marmillod, Pierre Lavanchy
1995
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/73ae0414-f716-42ee-90c8-3f307cc16271

About this result

Related concepts (25)

Tokamak

A tokamak (ˈtoʊkəmæk; токамáк) is a device which uses a powerful magnetic field to confine plasma in the shape of a torus. The tokamak is one of several types of magnetic confinement devices being developed to produce controlled thermonuclear fusion power. , it was the leading candidate for a practical fusion reactor. Tokamaks were initially conceptualized in the 1950s by Soviet physicists Igor Tamm and Andrei Sakharov, inspired by a letter by Oleg Lavrentiev. The first working tokamak was attributed to the work of Natan Yavlinsky on the T-1 in 1958.

Spherical tokamak

A spherical tokamak is a type of fusion power device based on the tokamak principle. It is notable for its very narrow profile, or aspect ratio. A traditional tokamak has a toroidal confinement area that gives it an overall shape similar to a donut, complete with a large hole in the middle. The spherical tokamak reduces the size of the hole as much as possible, resulting in a plasma shape that is almost spherical, often compared to a cored apple. The spherical tokamak is sometimes referred to as a spherical torus and often shortened to ST.

Magnetic confinement fusion

Magnetic confinement fusion is an approach to generate thermonuclear fusion power that uses magnetic fields to confine fusion fuel in the form of a plasma. Magnetic confinement is one of two major branches of fusion energy research, along with inertial confinement fusion. The magnetic approach began in the 1940s and absorbed the majority of subsequent development. Fusion reactions combine light atomic nuclei such as hydrogen to form heavier ones such as helium, producing energy.

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Direct Measurement of the Damping of Toroidicity-Induced Alfven Eigenmodes

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