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Direct detection of the precipitation of ring current electrons and protons stimulated by artificial VLF emission
Author(s) -
Kovrazhkin R. A.,
Mogilevsky M. M.,
Moltchanov O. A.,
Galperin Yu. I.,
Djordjio N. V.,
Lissakov Yu. V.,
Bosqued J. M.,
Rème H.
Publication year - 1984
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl011i008p00705
Subject(s) - electron precipitation , magnetosphere , physics , plasmasphere , proton , ring current , ionosphere , electron , cyclotron , van allen radiation belt , cyclotron resonance , atomic physics , astrophysics , geophysics , nuclear physics , plasma
Bursts of energetic electron and proton precipitation from the magnetosphere and artificially stimulated by a powerful ground‐based Soviet VLF emitter (F = 19.1 kHz, L = 4.0), were detected during the ESSA experiment aboard the AUREOL‐3 satellite (ARCAD‐3 project) at altitudes of 1500 ‐ 2000 km in the MLT morning sector. Stimulated electron and proton precipitations were clearly recorded in 7 overpasses out of 17 during the period 1 ‐ 25 December 1981. The precipitation zone corresponded to the projection on the ionosphere of the ring current region (L = 2.8 to 3.6), and was displaced equatorward with respect to the location of the VLF transmitter. The intensities of the artificial 0.1 ‐ 2 keV electron fluxes ranged from 10 4 to 10 5 (cm² sec ster keV) −1 and those of the 60 ‐ 220 keV protons from 10 0 to 10² (cm² sec ster keV) −1 . The 1.8 keV electron bursts were delayed by about 1 sec with respect to the VLF pulses, and the 110 keV proton fluxes were delayed by about 3 ‐ 5 sec. Results are discussed in terms of both Cerenkov and cyclotron resonance effects between VLF nonducted waves and magnetospheric particles.