Misha Stepanov | publications | J. Exp. Theor. Phys. (1996)

E. V. Podivilov, D. A. Shapiro, M. G. Stepanov, Narrowing of nonlinear resonances in a collisional plasma, Journal of Experimental and Theoretical Physics 82 (2) 221–227 (1996).

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The profile of a Bennett structure induced by an electromagnetic field in the velocity distribution of the particles and the spectrum of the probe field with allowance for the velocity dependence diffusion tensor have been calculated for the first time. In the case of Coulomb scattering of the plasma particles, the decrease in the collision rate with increasing particle velocity may lead to a narrowing of the Bennett structure or the probe field spectrum as the deviation of the wave frequency from the resonant value increases. The renormalization method is used to calculate the resonance's shape width. We also provide estimates demonstrating that with an argon laser the effect reaches 10% and can be observed. The calculations done in this paper can be used to measure the velocity dependence of diffusion tensor.