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Particle acceleration by a large-amplitude wave associated with an ion beam in a magnetized plasma

Published online by Cambridge University Press:  20 December 2006

HIROKI HASEGAWA ,
SEIJI ISHIGURO  and
MASAO OKAMOTO
HIROKI HASEGAWA
Affiliation:
Theory and Computer Simulation Center, National Institute for Fusion Science, Oroshi-cho 322-6, Toki 509-5292, Japan Present address: Earth Simulator Center, Japan Agency for Marine–Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan.
SEIJI ISHIGURO
Affiliation:
Theory and Computer Simulation Center, National Institute for Fusion Science, Oroshi-cho 322-6, Toki 509-5292, Japan The Graduate University for Advanced Studies (Soken-dai), Oroshi-cho 322-6, Toki 509-5292, Japan
MASAO OKAMOTO
Affiliation:
Theory and Computer Simulation Center, National Institute for Fusion Science, Oroshi-cho 322-6, Toki 509-5292, Japan The Graduate University for Advanced Studies (Soken-dai), Oroshi-cho 322-6, Toki 509-5292, Japan
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Abstract

Large-amplitude waves associated with a relativistic ion beam in a magnetized plasma are investigated by means of relativistic electromagnetic particle simulations. In the simulations, it is shown that electromagnetic fields are induced by an ion bunch which has Gaussian density distribution and that their profiles are similar to those of magnetosonic solitons. Further, when an ion beam propagates obliquely to the external magnetic field, it is found that an induced electric field has a parallel component along the magnetic field. Then, as the next step, giving another positron bunch, it is observed that some particles in a positron bunch are accelerated by the parallel electric field.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 941 - 944
Copyright
2006 Cambridge University Press

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