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Title: Helium cyclotron resonance within the earth's magnetosphere

Abstract

A histogram of electromagnetic Alfven/ion cyclotron wave frequencies, sampled within the geostationary enviroment and normalized by the equatorial proton cyclotron frequency, shows a dramatic gap centered near the helium (He/sup +/) cyclotron frequency. Also, strongly cyclotron phase bunched helium ions (20--200 eV) have been observed directly within the vicinity of wave environments. These observations are interpreted as resulting from the absorption of the waves through cyclotron resonance by cool ambient populations of helium ions.

Authors:
; ;
Publication Date:
Research Org.:
Geophysics AK-50, University of Washington, Seattle, Washington 98195
OSTI Identifier:
6617012
Alternate Identifier(s):
OSTI ID: 6617012
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophys. Res. Lett.; (United States); Journal Volume: 8:1
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MAGNETOSPHERE; CYCLOTRON RESONANCE; ALFVEN WAVES; HELIUM IONS; ION WAVES; PROTONS; RADIATION BELTS; BARYONS; CHARGED PARTICLES; EARTH ATMOSPHERE; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYDROMAGNETIC WAVES; IONS; NUCLEONS; PLASMA WAVES; RESONANCE 640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)

Citation Formats

Mauk, B.H., McIlwain, C.E., and McPherron, R.L.. Helium cyclotron resonance within the earth's magnetosphere. United States: N. p., 1981. Web. doi:10.1029/GL008i001p00103.
Mauk, B.H., McIlwain, C.E., & McPherron, R.L.. Helium cyclotron resonance within the earth's magnetosphere. United States. doi:10.1029/GL008i001p00103.
Mauk, B.H., McIlwain, C.E., and McPherron, R.L.. Thu . "Helium cyclotron resonance within the earth's magnetosphere". United States. doi:10.1029/GL008i001p00103.
@article{osti_6617012,
title = {Helium cyclotron resonance within the earth's magnetosphere},
author = {Mauk, B.H. and McIlwain, C.E. and McPherron, R.L.},
abstractNote = {A histogram of electromagnetic Alfven/ion cyclotron wave frequencies, sampled within the geostationary enviroment and normalized by the equatorial proton cyclotron frequency, shows a dramatic gap centered near the helium (He/sup +/) cyclotron frequency. Also, strongly cyclotron phase bunched helium ions (20--200 eV) have been observed directly within the vicinity of wave environments. These observations are interpreted as resulting from the absorption of the waves through cyclotron resonance by cool ambient populations of helium ions.},
doi = {10.1029/GL008i001p00103},
journal = {Geophys. Res. Lett.; (United States)},
number = ,
volume = 8:1,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1981},
month = {Thu Jan 01 00:00:00 EST 1981}
}