Abstract:
The scattering of a wave by an individual particle is due to the fact that the particle oscillates in the field of the incident wave and these oscillations radiate the scattered wave. It is usually believed that scattering in a plasma, even though the cross section in it is on the order of the Thomson scattering cross section in a vacuum, takes place by plasma density fluctuations, which also involve ions, so that the total scattered radiation is not the sum of Thomson scattering by individual electrons. Although the scattering formulas widely used in processing observations are correct, their interpretation often is not. This note proves rigorously that scattering in a plasma is the sum of the scattering from the electrons and ions, with the total momentum difference between the incident and scattered waves being distributed among the electrons and ions, and that it is only based on this interpretation that we can obtain the conservation laws for waves and particles in the plasma. General physical, astrophysical, and other implications of the correct interpretation of scattering processes for radiation frequencies much larger than the plasma frequency are discussed.
Received:January 10, 2012 Revised:February 23, 2012 Accepted: March 13, 2012
Citation:
V. N. Tsytovich, “On the physical interpretation of Thomson scattering in a plasma”, UFN, 183:2 (2013), 195–206; Phys. Usp., 56:2 (2013), 180–191
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Linking options:
https://www.mathnet.ru/eng/ufn4237
https://www.mathnet.ru/eng/ufn/v183/i2/p195
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R. I. Barnes, M. Singh, F. Earl, “An Hf and Lower Vhf Spectrum Assessment System Exploiting Instantaneously Wideband Capture”, Radio Sci., 52:9 (2017), 1081–1095
B. G. Shpynev, “Refraction and Faraday Rotation in the Incoherent Scatter Radar Technique”, Radio Sci., 52:9 (2017), 1067–1080
B. G. Shpynev, G. A. Zherebtsov, D. S. Kushnarev, S. S. Alsatkin, D. S. Khabituev, A. L. Voronov, “Expanding the Diagnostic Capabilities of Incoherent Scatter Radar Technique”, 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), IEEE, 2017, 1996–2003
V V Mirnov, D J Den Hartog, “Polarization of incoherent Thomson scattering for electron temperature measurement”, Plasma Phys. Control. Fusion, 59:6 (2017), 063001
V. N. Tsytovich, “Perspectives of experimental and theoretical studies of self-organized dust structures in complex plasmas under microgravity conditions”, Phys. Usp., 58:2 (2015), 150–166
P. Tolias, S. Ratynskaia, A. Panarese, S. Longo, U. de Angelis, “Natural fluctuations in un-magnetized and magnetized plasmas”, J. Plasma Phys, 2015, 1
Vadim Tsytovich, Namik Gusein-zade, Alexander Ignatov, “Coherent scattering of electromagnetic waves by self-organized dust structures: Degree of coherence”, Phys. Plasmas, 22:2 (2015), 023709
Vadim Tsytovich, Namik Gusein-zade, Alexander Ignatov, “Theory of hysteresis during electron heating of electromagnetic wave scattering by self-organized dust structures in complex plasmas”, Phys. Plasmas, 22:7 (2015), 073704
Tsytovich V.N., “Note on Scattering of Electromagnetic Waves By Nonlinearly Screened Dust Grains in Plasmas”, Contrib. Plasma Phys., 55:9 (2015), 664–670
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