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Solitons in a magnetized ion-beam plasma system

Published online by Cambridge University Press:  13 March 2009

B. C. Kalita ,
M. K. Kalita  and
R. P. Bhatta
B. C. Kalita
Affiliation:
Department of Mathematics, Gauhati University, Guwahati 781 014, Assam, India
M. K. Kalita
Affiliation:
IASST, Khanapara, Guwahati 781 022, Assam, India
R. P. Bhatta
Affiliation:
Department of Physics, Nalbari College, Nalbari 781 335, Assam, India
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Abstract

The formation of ion-acoustic solitary waves in a magnetized plasma with stationary ions and beam ions together with inertia-less electrons is investigated. The generation of waves in a plane is assumed to be one-dimensional, in a direction inclined at an angle θ to the direction of the magnetic field, with constant drift velocity of the ion beam. Remarkably, the amplitudes of the solitons are found to attain a maximum value at a particular beam-ion velocity γ, and then decrease slightly and remain almost constant for higher γ. The width of the waves is large at small y for small beam-ion density Nb, but it attains a constant minimum value at a particular value of γ. The amplitude decreases sharply to zero with decreasing y, whereas it remains almost constantly high for larger y. It is observed that as a wave approaches the direction of the magnetic field, its amplitude increases to a constant maximum value, which is larger for higher beam-ion velocities.

Type
Research Article
Information
Journal of Plasma Physics , Volume 50 , Issue 3 , December 1993 , pp. 349 - 357
Copyright
Copyright © Cambridge University Press 1993

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