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Heating of electrons and ions by inverse bremsstrahltmg absorption: A self-similar state of the plasma

par Balescu, Radu
Référence Journal of plasma physics, 27, 3, page (553-570)
Publication Publié, 1982

Article révisé par les pairs

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Résumé :

It is shown that, under the influence of a monochromatic HF electric field (laser beam), both the electrons and the ions in a high-Z plasma reach a homogeneous and isotropic self-similar state (SSS) in which the distribution functions are of the factorized form: F^w.t) = naWaZ(t) a(v)>v — w/Wa(t), a ~ e, i, where WJf) is a scaling velocity, the square of which is proportional to the effective temperature. Whereas the SSS for the electrons was known from previous work, with it is shown here that the corresponding ion SSS exists and is characterized by a simple Maxwellian, ocexp(— y2). The discussion of the thermal velocities Wa(t), which are obtained in analytical form, provides a transparent physical insight into the heating mechanism of the plasma by inverse bremsstrahlung absorption. © 1982, Cambridge University Press. All rights reserved.