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Manuscript Title: Numerical evaluation of magnetic coordinates for toroidal magnetic confinement devices.
Authors: G. Kuo-Petravic
Program title: MAGCFA
Catalogue identifier: ACCO_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 33(1984)353
Programming language: Fortran.
Computer: CRAY-1.
Operating system: COSMOS.
RAM: 208K words
Word size: 64
Peripherals: graph plotter.
Keywords: Plasma physics, Toroidal magnetic fields, Fourier transform, Stability.
Classification: 19.6.

Nature of problem:
Given a toroidal magnetic field we seek to describe this field in magnetic field line coordinates. This description is widely used for calculations on plasma motion in magnetic fusion research.

Solution method:
A field line is integrated on a given flux surface. Subsequent Fourier decomposition using Fast Fourier Transform provides the value of the magnetic field in the magnetic coordinates.

This program is applicable to any toroidal confinement system where the magnetic field is known everywhere and whose value is computed from a package supplied by the user.

Running time:
This depends very much on the quality of the magnetic field representation required. Usually the time is < 120 sec on CRAY-I.