IS LINEAR GYRO-RESONANT INTERACTION RESPONSIBLE FOR 2HZ. SIDE BANDS?
Anil Kumar
Department of Physics, PDM College of Engineering, Bahadurgarh (Jhajjar), Haryana -124507 (India).
D.P. Singh
Department of Physics, PPIMT, Chaudharywas (Hisar), Haryana -125001 (India).
Ashwani Kumar
Department of Physics, TRA Memorial Institute of Engg& Technology Mandi (H.P.)-175008.
23-31
Vol: 4, Issue: 2, 2014
Receiving Date:
2014-02-13
Acceptance Date:
2014-04-14
Publication Date:
2014-04-15
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Abstract
Wave-particle interaction plays an important role in the morphology of ionosphere and
magnetosphere and wave propagation. Common view is that Nonlinear cyclotron interaction between
resonant electrons, in resonance with transmitted signals in the magnetosphere in 1-30 kHz range is a
reason to cause side bands. Side band spacing of 20 Hz (and above) can easily be explained through
nonlinear amplification process. Wave magnetic amplitude of 3-5 pT for wave-particle interaction to
occur in the magnetosphere the need for non-linear interaction as per the established theory of Inan
(1977). It is shown that wave magnetic amplitude (Bw) only of ~2pTisneeded to cause small-such as 2-
3 Hz side band spacing, which is below 3 pT suggesting that linear gyro-resonant interaction may also
be a cause of small side bands.
Keywords:
Wave-particle interaction, Trapped particles, VLF Emissions
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