Abstract
The polarization bremsstrahlung from thermal electrons scattered by the Debye sphere of an ion in a plasma is studied in the quasiclassical approximation. The model of the local plasma frequency is used to check the validity of the asymptotic expression for the polarizability of the electron cloud of an ion in the high-frequency range. This asymptotic expression is then used to derive a formula for the intensity of the total effective polarization bremsstrahlung. The R factor (the ratio of the contribution from the polarization bremsstrahlung to the contribution from conventional static bremsstrahlung) is obtained as a function of the plasma coupling parameter and electron density in order to analyze the role of the polarization bremsstrahlung in the total bremsstrahlung of the thermal plasma electrons. The spectral intensity of the effective polarization bremsstrahlung is calculated in the rotational approximation, which was previously employed in the theory of conventional static bremsstrahlung. It is shown that the spectral intensity of the polarization bremsstrahlung from thermal electrons scattered by the Debye sphere around an ion, as compared with the polarization bremsstrahlung by fast superthermal electrons, decreases more gradually with increasing frequency.
Similar content being viewed by others
References
A. A. Akopyan and V. N. Tsytovich, Fiz. Plazmy 1, 673 (1975) [Sov. J. Plasma Phys. 1, 371 (1975)].
A. A. Akopyan and V. N. Tsytovich, Zh. Éksp. Teor. Fiz. 71, 166 (1976) [Sov. Phys. JETP 44, 87 (1976)].
V. A. Astapenko, V. M. Buïmistrov, Yu. A. Krotov, and V. N. Tsytovich, Fiz. Plazmy 15, 202 (1989) [Sov. J. Plasma Phys. 15, 116 (1989)].
V. I. Gervids and V. I. Kogan, Pis'ma Zh. Éksp. Teor. Fiz. 22, 308 (1975) [JETP Lett. 22, 142 (1975)].
V. I. Kogan and A. B. Kukushkin, Zh. Éksp. Teor. Fiz. 87, 1164 (1984) [Sov. Phys. JETP 60, 665 (1984)].
V. I. Kogan, A. B. Kukushkin, and V. S. Lisitsa, Phys. Rep. 213, 1 (1992).
V. A. Astapenko, L. A. Bureyeva, and V. S. Lisitsa, Phys. Scr. T T86, 62 (2000).
V. A. Astapenko, L. A. Bureeva, and V. S. Lisitsa, Zh. Éksp. Teor. Fiz. 117, 496 (2000) [JETP 90, 434 (2000)].
W. Brandt and S. Lundqvist, Phys. Rev. 139, A612 (1965).
V. N. Tsytovich, in Polarization Bremsstrahlung from Atoms and Particles, Ed. by V. N. Tsytovich and I. M. Oiringel' (Nauka, Moscow, 1987), Sec. 2.3.
Author information
Authors and Affiliations
Additional information
__________
Translated from Fizika Plazmy, Vol. 27, No. 6, 2001, pp. 503–508.
Original Russian Text Copyright © 2001 by Astapenko.
Rights and permissions
About this article
Cite this article
Astapenko, V.A. Theory of the polarization bremsstrahlung from thermal electrons scattered by the Debye sphere of an ion in a plasma. Plasma Phys. Rep. 27, 474–479 (2001). https://doi.org/10.1134/1.1378124
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1378124