A Study of Ray Focussing of Whistler-Mode Waves in the Outer Magnetosphere

Kiyohiko ISHIKAWA; Katsumi HATTORI; Masashi HAYAKAWA

A Study of Ray Focussing of Whistler-Mode Waves in the Outer Magnetosphere

Kiyohiko ISHIKAWA, Katsumi HATTORI, Masashi HAYAKAWA

Full Text Views

0

Cite this

Summary :

The purpose of this paper is to investigate the ray focussing of whistler-mode waves in the outer magnetosphere which results in an enhanced wave-particle interactions. The critical frequency in a homogeneous plasma is first studied, at which the refractive index surface of whistler-mode waves indicates a zero curvature at a longitudinal wave normal angle. This critical frequency is also found to be consistent with the zero diffraction coefficient in the full-wave theory for a slightly inhomogeneous plasma. The two-dimensional ray-tracing computations for varying the frequency and initial wave normal direction in an inhomogeneous realistic model of the outer magnetosphere, have yielded that although the critical frequency for the homogeneous case has its importance even in the inhomogeneous plasma, the strongest ray focussing seems to occur at a frequency slightly below the above critical frequency, and hence that an enhanced gyroresonance wave-particle interaction is anticipated at this frequency.

Publication: IEICE TRANSACTIONS on transactions Vol.E73-E No.1 pp.149-154

Publication Date: 1990/01/25

Publicized

Online ISSN

DOI

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Kiyohiko ISHIKAWA
Katsumi HATTORI
Masashi HAYAKAWA

Keyword

Cite this

Copy

Kiyohiko ISHIKAWA, Katsumi HATTORI, Masashi HAYAKAWA, "A Study of Ray Focussing of Whistler-Mode Waves in the Outer Magnetosphere" in IEICE TRANSACTIONS on transactions, vol. E73-E, no. 1, pp. 149-154, January 1990, doi: .
Abstract: The purpose of this paper is to investigate the ray focussing of whistler-mode waves in the outer magnetosphere which results in an enhanced wave-particle interactions. The critical frequency in a homogeneous plasma is first studied, at which the refractive index surface of whistler-mode waves indicates a zero curvature at a longitudinal wave normal angle. This critical frequency is also found to be consistent with the zero diffraction coefficient in the full-wave theory for a slightly inhomogeneous plasma. The two-dimensional ray-tracing computations for varying the frequency and initial wave normal direction in an inhomogeneous realistic model of the outer magnetosphere, have yielded that although the critical frequency for the homogeneous case has its importance even in the inhomogeneous plasma, the strongest ray focussing seems to occur at a frequency slightly below the above critical frequency, and hence that an enhanced gyroresonance wave-particle interaction is anticipated at this frequency.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e73-e_1_149/_p

Copy

@ARTICLE{e73-e_1_149,
author={Kiyohiko ISHIKAWA, Katsumi HATTORI, Masashi HAYAKAWA, },
journal={IEICE TRANSACTIONS on transactions},
title={A Study of Ray Focussing of Whistler-Mode Waves in the Outer Magnetosphere},
year={1990},
volume={E73-E},
number={1},
pages={149-154},
abstract={The purpose of this paper is to investigate the ray focussing of whistler-mode waves in the outer magnetosphere which results in an enhanced wave-particle interactions. The critical frequency in a homogeneous plasma is first studied, at which the refractive index surface of whistler-mode waves indicates a zero curvature at a longitudinal wave normal angle. This critical frequency is also found to be consistent with the zero diffraction coefficient in the full-wave theory for a slightly inhomogeneous plasma. The two-dimensional ray-tracing computations for varying the frequency and initial wave normal direction in an inhomogeneous realistic model of the outer magnetosphere, have yielded that although the critical frequency for the homogeneous case has its importance even in the inhomogeneous plasma, the strongest ray focussing seems to occur at a frequency slightly below the above critical frequency, and hence that an enhanced gyroresonance wave-particle interaction is anticipated at this frequency.},
keywords={},
doi={},
ISSN={},
month={January},}

Copy

TY - JOUR
TI - A Study of Ray Focussing of Whistler-Mode Waves in the Outer Magnetosphere
T2 - IEICE TRANSACTIONS on transactions
SP - 149
EP - 154
AU - Kiyohiko ISHIKAWA
AU - Katsumi HATTORI
AU - Masashi HAYAKAWA
PY - 1990
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E73-E
IS - 1
JA - IEICE TRANSACTIONS on transactions
Y1 - January 1990
AB - The purpose of this paper is to investigate the ray focussing of whistler-mode waves in the outer magnetosphere which results in an enhanced wave-particle interactions. The critical frequency in a homogeneous plasma is first studied, at which the refractive index surface of whistler-mode waves indicates a zero curvature at a longitudinal wave normal angle. This critical frequency is also found to be consistent with the zero diffraction coefficient in the full-wave theory for a slightly inhomogeneous plasma. The two-dimensional ray-tracing computations for varying the frequency and initial wave normal direction in an inhomogeneous realistic model of the outer magnetosphere, have yielded that although the critical frequency for the homogeneous case has its importance even in the inhomogeneous plasma, the strongest ray focussing seems to occur at a frequency slightly below the above critical frequency, and hence that an enhanced gyroresonance wave-particle interaction is anticipated at this frequency.
ER -