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Generation of a poloidal magnetic field in a noncollisional plasma by an elliptically polarized Gaussian laser beam

Published online by Cambridge University Press:  15 October 2009

M.K. Srivastava ,
S.V. Lawande ,
D. Dutta ,
S. Sarkar ,
M. Khan  and
B. Chakraborty
M.K. Srivastava
Affiliation:
Theoretical Physics Division, Bhabha Atomic Research Centre, Bombay, 400 085, India
S.V. Lawande
Affiliation:
Theoretical Physics Division, Bhabha Atomic Research Centre, Bombay, 400 085, India
D. Dutta
Affiliation:
Centre for Plasma Studies, Jadavpur University, Calcutta, 700 032, India
S. Sarkar
Affiliation:
Centre for Plasma Studies, Jadavpur University, Calcutta, 700 032, India
M. Khan
Affiliation:
Centre for Plasma Studies, Jadavpur University, Calcutta, 700 032, India
B. Chakraborty
Affiliation:
Centre for Plasma Studies, Jadavpur University, Calcutta, 700 032, India
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Abstract

The generation of poloidal magnetic field in an inhomogeneous cold, collisionless plasma by an elliptically polarized Gaussian laser beam is discussed. A field in the range of megagauss is induced by the laser inhomogeneity effect even for a normal incident beam. This field scales as I0 λ, where I0 and λ are the intensity and wavelength of the laser beam, respectively, and is independent of the density profile structure. The small angular correction factor due to focal spot asymmetry scales as ∼I0λ3 and may be significant for a small-sized plasma with a steep density profile. The limitation of our model is discussed, with possible implications.

Type
Research Article
Information
Laser and Particle Beams , Volume 16 , Issue 2 , June 1998 , pp. 277 - 283
Copyright
Copyright © Cambridge University Press 1998

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References

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