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Title: Diffusion coefficient and wave amplification determination from pitch angle dependent kinetic energy of electrons
Authors: Singh, D P
Singh, U P
Keywords: Diffusion coefficient;Wave amplification;Thermal anisotropy
Issue Date: Aug-2004
Publisher: NISCAIR-CSIR, India
PACS No.: 94.10 Lf, 94.20 Rr, 94.30 Hn
Abstract: A new expression for diffusion coefficient D (α) is derived, which is a function of pitch angle (α) dependent kinetic energy of electrons. Pitch angle diffusion of electrons along with amplification o f interacting VLF signals is studied at L= 5.1. Diffusion coefficient D (α) has been found to increase but temporal wave growth (r) and power gain (in dB) decrease with increase in pitch angle. The derived expression for D (α) is found to be convenient for numerical analysis. The results are interpreted in the light of observation/analysis of transmitted signals by Sonwalkar et al. [J Geophys Res (USA), 102 (1997) 14363]. The non-observation of 2.55-2.9 kHz signals is attributed to scarcity of suitable pitch angle anisotropy, A(Er) ·
Page(s): 234-240
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.33(4) [August 2004]

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