A contribution to the theory of the equatorial noise generation in the Earth’s magnetosphere


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Abstract

This work is devoted to the study of the generation of the equatorial noise—electromagnetic emission below the LHR frequency observed near the equatorial plane of the magnetosphere at distances of ~4RE. According to accepted views, the generation of the equatorial noise is related to the instability of ring current protons. In this work, a logarithmic distribution of energetic protons over the magnetic moment with an empty loss cone is proposed, and arguments for the formation of such a distribution are presented. The main result of the work is the calculation and analysis of the instability growth rate of waves forming the equatorial noise. The growth rate obtained in this work significantly differs from that encountered in the literature.

About the authors

D. R. Shklyar

Space Research Institute

Author for correspondence.
Email: david@iki.rssi.ru
Russian Federation, Moscow, 117997

M. A. Balikhin

Department of Automatic Control and Systems Engineering

Email: david@iki.rssi.ru
United Kingdom, Sheffield, S1 3JD

E. E. Titova

Space Research Institute; Polar Geophysical Institute, Apatity Division, Kola Science Center

Email: david@iki.rssi.ru
Russian Federation, Moscow, 117997; Apatity, Murmansk oblast, 184209

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