Publication

Ideal MHD stability calculations for compact stellarators

Wilfred Anthony Cooper
2001
Journal Articles

Abstract

Stability results for high-n ideal local pressure-driven instabilities (ballooning and interchange: modes) are calculated from the COBRA and TERPSICHORE codes and compared for several low aspect ratio stellarators. Such a comparison is important because of the predominant roles that these codes are playing in the design of compact stellarators at several laboratories around the world. The code development required to reach the levels of convergence and accuracy needed for reliable operation at low aspect ratios is also described. (C) 2001 Elsevier Science B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/91251b54-454a-4a79-b68f-9c7c4c8b8efe

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Wilfred Anthony Cooper
2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/91251b54-454a-4a79-b68f-9c7c4c8b8efe

About this result

Related concepts (17)

Stellarator

A stellarator is a plasma device that relies primarily on external magnets to confine a plasma. Scientists researching magnetic confinement fusion aim to use stellarator devices as a vessel for nuclear fusion reactions. The name refers to the possibility of harnessing the power source of the stars, such as the Sun. It is one of the earliest fusion power devices, along with the z-pinch and magnetic mirror.

Interchange instability

The interchange instability, also known as the Kruskal–Schwarzchild instability or flute instability, is a type of plasma instability seen in magnetic fusion energy that is driven by the gradients in the magnetic pressure in areas where the confining magnetic field is curved. The name of the instability refers to the action of the plasma changing position with the magnetic field lines (i.e. an interchange of the lines of force in space) without significant disturbance to the geometry of the external field.

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).

Related publications (32)

Ideal MHD stability calculations for compact stellarators

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