Publication

Kinetic Alfven eigenmodes in a hot tokamak plasma

Ambrogio Fasoli, Jonathan Bryan Lister, Laurent Villard, Jan Vaclavik, Kurt Appert
1997
Journal Articles

Abstract

Kinetic effects such as finite ion Larmor excursions and resonant Landau interactions are studied in the toroidicity Alfven eigenmode (TAE) range of frequencies. A new Alfven mode conversion mechanism is described taking place away from the resonances through toroidal mode coupling. It generates a group of kinetic Alfven eigenmodes (KAE) in the neighbourhood of each fluid eigenmode, with wavefields that extend throughout the plasma radius and could lead to substantial a particle losses. Comparisons carried out with measurements from the JET tokamak show that the multiple peaks observed on the response are KAE-induced in the neighbourhood of an elongation-induced Alfven eigenmode.

Official source

https://infoscience.epfl.ch/entities/publication/2721c49b-0e98-4161-b96e-60021644384a

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Ambrogio Fasoli, Jonathan Bryan Lister, Laurent Villard, Jan Vaclavik, Kurt Appert
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2721c49b-0e98-4161-b96e-60021644384a

About this result

Related concepts (32)

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.

Related publications (32)

Kinetic Alfven eigenmodes in a hot tokamak plasma

Chat with Graph Search

Validation of 3d Mhd Simulations of Ne/d2 Mixed Shattered Pellet Injection in Jet

Study of the fast-ion confinement via velocity-space resolved measurements in several plasma scenarios in the TCV tokamak

Non-inductive high-performance discharges on TCV on the path to steady state