Stability of magnetic configurations containing the toroidal and axial fields

Details Stability of magnetic configurations containing the toroidal and axial fields Stability of magnetic configurations containing the toroidal and axial fields

2007-10-25

arxiv.org/abs/0710.4588v1

Astronomy and Astrophysics

Astrophysics

8 pages, 7 figures, A&A, to appear

Scientific paper

10.1051/0004-6361:20077476

Stability properties of magnetic-field configurations containing the toroidal and axial field are considered. The stability is treated by making use of linear analysis. It is shown that the conditions required for the onset of instability are essentially different from those given by the necessary condition $d (s B_{\phi})/ds > 0$, where $s$ is the cylindrical radius. The growth rate of instability is calculated for a wide range of the parameters. We argue that the instability can operate in two different regimes depending on the strength of the axial field and the profile of the toroidal field.

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