Electrostatic decay of beam-generated plasma turbulence

摘要: The study of the evolution a suprathermal electron beam traveling through background plasma is relevant to physics solar flares and their associated type III radio bursts. As they evolve, guided by coronal magnetic field lines, these beams generate Langmuir turbulence. beam-generated turbulence in turn responsible for emission photons at second harmonic local frequency, which are observed during To emission, beam-aligned waves must coalesce, therefore, process capable redirecting an effective fashion required. Different theoretical models identify electrostatic (ES) decay L1 → L2 + S (where L indicates wave ion-acoustic wave) as mechanism waves. Two different regimes have been proposed play key role: backscattering diffusive (small-angle) scattering. This paper comparative analysis ES rate each regime observable characteristics that expected resulting