Generation of Langmuir waves in a magnetized plasma with low-frequency turbulence

1Burinskaya, TM, 2Rauch, JL, 1Mogilevsky, MM
1Space Research Institute of the Russian AS, Moscow, Russia
2LPCE/CNRS, ЗА Avenue de la Recherche Scientifique, Orleans, France
Kosm. nauka tehnol. 2002, 8 ;(Supplement2):082-088
Publication Language: Russian
In the framework of the quasilinear statistical approximation, equations are derived that describe the dynamics of the formation of the spectra of Langmuir oscillations in a magnetized collisionless plasma with low-frequency turbulence. The equations obtained take into account the scattering of waves excited by an electron beam against a given background of plasma density fluctuations both at small and large angles. Owing to the scattering of Langmuir waves, the vibrational energy is redistributed in phase space and spectra of a characteristic form are formed. Numerical calculations carried out with plasma parameters characteristic of the polar cap of the Earth’s magnetosphere make it possible to explain the generation of small-scale bursts of Langmuir oscillations recorded onboard the INTERBALL-2 satellite during overflights in this region.
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