Broadband electrostatic noise due to field-aligned currents

Details Broadband electrostatic noise due to field-aligned currents Broadband electrostatic noise due to field-aligned currents

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..899s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 899-902.

Physics

37

Electromagnetic Noise, Electron Beams, Electrostatics, Field Aligned Currents, Plasma Frequencies, Broadband, Digital Simulation, Electron Plasma

Scientific paper

There are observations of broadband electrostatic noise in the plasma-sheet boundary layer that are associated with field-aligned currents (electron beams), which often have an upper cutoff frequency above the electron plasma frequency. In this paper linear theory and numerical simulations are used to study instabilities caused by an electron beam in a thermally mixed plasma. It is shown that two instabilities, the electron acoustic and electron-ion instabilities, can combine to form a broadband wave spectrum that rapidly destroys the electron beam.

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