Generation of powerful terahertz emission in a beam-driven strong plasma turbulence

Abstract

Generation of terahertz electromagnetic radiation due to coalescence of upper-hybrid waves in the long-wavelength region of strong plasma turbulence driven by a high-current relativistic electron beam in a magnetized plasma is investigated. The width of frequency spectrum as well as angular characteristics of this radiation for various values of plasma density and turbulence energy are calculated using the simple theoretical model adequately describing beam-plasma experiments at mirror traps. It is shown that the power density of electromagnetic emission at the second harmonic of plasma frequency in the terahertz range for these laboratory experiments can reach the level of 1 ${MW/cm}^3$ with 1% conversion efficiency of beam energy losses to electromagnetic emission.

References in corpus (1)

• Second harmonic electromagnetic emission of a turbulent magnetized plasma driven by a powerful electron beam

Cited by in corpus (5)

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• Highly efficient electromagnetic emission during 100 keV electron beam relaxation in a thin magnetized plasma
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• Modulational instability of a Langmuir wave in plasmas with energetic tails of superthermal electrons