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Title: Influence of inhomogeneities of the plasma density and electric field on the generation of electrostatic noise in the auroral zone

In order to study instabilities caused by inhomogeneities of the electric field and plasma density in the auroral zone, numerical algorithms are developed and numerical simulations are performed for different conditions in the background plasma. To this end, a nonlocal dispersion relation for a given type of wave is analyzed. It is shown that the dispersion relation has unstable solutions in a wide range of frequencies and wavenumbers. These solutions manifest themselves in satellite observations as a broadband spectrum of electrostatic perturbations. Two mechanisms of broadband noise generation related to the gradients of the density and electric field are compared.
Authors:
; ;  [1] ; ;  [2]
  1. Russian Academy of Sciences, Space Research Institute (Russian Federation)
  2. Russian Academy of Sciences, Polar Geophysical Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22472419
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 41; Journal Issue: 3; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALGORITHMS; AURORAL ZONES; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; DISPERSION RELATIONS; DISTURBANCES; ELECTRIC FIELDS; ELECTROSTATICS; INHOMOGENEOUS PLASMA; PLASMA DENSITY