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Charged-particle orbits near a magnetic null point

Published online by Cambridge University Press:  14 February 2001

K. JAROENSUTASINEE  and
G. ROWLANDS
K. JAROENSUTASINEE
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, UK Present address: Walaik University, Thailand.
G. ROWLANDS
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, UK
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Extract

An approximate analytical expression is obtained for the orbits of a charged particle moving in a cusp magnetic field. The particle orbits pass close to or through a region of zero magnetic field before being reflected in regions where the magnetic field is strong. Comparison with numerically evaluated orbits shows that the analytical formula is surprisingly good and captures all the main features of the particle motion. A map describing the long-time behaviour of such orbits is obtained.

Type
Research Article
Information
Journal of Plasma Physics , Volume 64 , Issue 3 , September 2000 , pp. 255 - 262
Copyright
© 2000 Cambridge University Press

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