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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.

Restrictions:
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.