Plasmaspheric parameters as determined from whistler spectrograms: a review

The dispersion for the whistler mode instability in an infinite magnetoplasma in the presence of a perpendicular electric field for a loss cone type distribution function having an anisotropic temperature is obtained. The method of characteristics solutions using the perturbed and unperturbed particle trajectories have been used to determine the perturbed distribution function. Growth rates for various strengths of the loss cone index have been determined. The effect of injection of hot energetic particles of solar wind origin having a positive slope and a loss cone index j=1 has been evaluated. The ac frequency, rather than its magnitude, affects the growth rate and shifts the maxima to a higher or frequency range, modifying the resonance conditions of charged particles. The injection of a higher number of energetic hot electrons affects the growth rate significantly, decreasing the maxima by an order of magnitude and shifting them to a lower frequency or ranges in contrast to cold plasma injection results. This result is of importance in explaining the observed VLF emissions over a wide frequency range.

Generation of whistler emissions by injection of hot electrons in the presence of a perpendicular Ac electric field

Propagation modes of low- and very-low-latitude whistlers

The propagation of low-latitude whistlers: A review

Formation of the protonated formaldehyde and acetaldehyde dimer ions, H+(HCOH)2 and H+(CH3COH)2, respectively, and their subsequent dissociative recombination with electrons was studied in a high-pressure flowing afterglow (HPFA) using the axially movable Langmuir probe. The obtained recombination rate coefficients are (3.3±1)×10-6 cm3 s-1 for H+(HCOH)2 and (1.4±0.5)×10-6 cm3 s-1 for H+(CH3COH)2, at 450 and 500 K, respectively. The evolution of the electron energy distribution function and the electron temperature in the recombination-dominated flowing afterglow plasma were also measured.

K.D. Misra

Papers

Magnetospheric electric field from low latitude whistlers during magnetic storm