On the stability of twisted magnetic fields

Details On the stability of twisted magnetic fields On the stability of twisted magnetic fields

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..53..165t&link_type=abstract

Astrophysics and Space Science, vol. 53, no. 1, Jan. 1978, p. 165-172. National Research Council of Canada

Astronomy and Astrophysics

Astrophysics

11

Flow Velocity, Lines Of Force, Magnetic Field Configurations, Magnetohydrodynamic Stability, Velocity Distribution, Energy Dissipation, Kinetic Energy, Space-Time Functions

Scientific paper

The stability of helical magnetic fields is investigated when fluid motions are present along the lines of force. The general dispersion relation is obtained and some limiting cases are examined. It is established that the configuration can be unstable when the velocity field exceeds a certain critical value. This result is to be compared with the case when the helical fields confined by a rigid boundary are stable when the energy density in the velocity field is at least equal to that of the magnetic field.

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