Electrostatic and electromagnetic turbulence associated with the earth's bow shock

Details Electrostatic and electromagnetic turbulence associated with the earth's bow shock Electrostatic and electromagnetic turbulence associated with the earth's bow shock

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80...19r&link_type=abstract

Journal of Geophysical Research, vol. 80, Jan. 1, 1975, p. 19-31.

Other

24

Bow Waves, Electrostatic Waves, Geomagnetism, Plasma Turbulence, Shock Wave Interaction, Solar Wind, Electric Fields, Electromagnetic Noise, Magnetic Flux, Plasma Oscillations, Plasma Spectra, Plasma Waves, Satellite Observation, Whistlers

Scientific paper

Simultaneous measurements were made of the electric and magnetic field spectral densities in the earth's bow shock by a plasma wave experiment on the Imp 6 spacecraft. The frequency range of the plasma wave detector was 20 Hz to 200 kHz. Electric fields were measured with high-sensitivity 100-m long dipole antennas and magnetic fields were measured with single-turn loop antennas. Two components are distinguished in the electric field spectrum in the bow shock: one component has a broad peak centered in the region 200-800 Hz, while the other component increases monotonically with decreasing frequency. The magnetic field spectrum has only one component that increases monotonically with decreasing frequency and has an upper cutoff frequency near the local electron gyrofrequency. This magnetic field turbulence is judged to be caused by whistler mode waves. The monotonic component of the electric field spectrum is thought to be the electric field spectrum of these whistler mode waves.

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