Hostname: page-component-7c8c6479df-94d59 Total loading time: 0 Render date: 2024-03-28T01:56:10.496Z Has data issue: false hasContentIssue false

Characteristics of the electric field far from and close to a radiating antenna around the lower hybrid resonance in the ionospheric plasma

Published online by Cambridge University Press:  13 March 2009

C. Beghin
Affiliation:
Groupo de Recherches Ionosph ériques du C.N.R.S., Orleans
R. Debrie
Affiliation:
Facult é des Sciences, D éartement do Physique, Orleans

Abstract

From a basic discussion of the behaviour of VLF waves propagated almost perpendicularly to the earth 's magnetic field, the lower hybrid resonance (LHR) frequency is seen as a boundary between compressional Alfv én waves and electrostatic sound waves. The disparity of the wavelengths involved leads to a fundamental difference between the characteristics of the AC electric field far from and close to the source.

Some detailed observations of this field are presented, from an experiment that used both a mother-daughter technique for large distance measurements and a quadrupole probe technique for the local field, and that was performed in the equatorial ionosphere. The frequency dispersion of quasi-transverse (QT) waves received at a large distance and the amplitude-frequency response of the VLF quadrupole probe are compared with a theoretical analysis for the warm ionospheric plasma. From this analysis, the possibility is established of using the properties of fast and slow waves in active experiments, for measuring simultaneously the LHR, the electron density, a hybrid ion-electron thermal velocity and possibly the plasma drift velocity.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Barrington, R. E. 1969 Plasma Waves in Space and in the Laboratory, vol. 1, p. 361. Edinburgh University Press.Google Scholar
Beghin, C. & Renard, C. 1970 Plasma Waves in Space and in the Laboratory, vol. 2, p. 299. Edinburgh University Press.Google Scholar
Beghin, C. 1971 Space Research, vol. 11, p. 1071. Berlin: Akademie.Google Scholar
Beghin, C. 1972 Tech. Rep. GRI/INT/92.Google Scholar
Bekefi, G. 1966 Radiation Processes in Plasmas. Wiley.Google Scholar
Brice, N. M. & Smith, R. L. 1965 J. Geophys. Res. 70, 71.CrossRefGoogle Scholar
Cerisier, J. C. 1970 Plasma Waves in Space and in the Laboratory, vol. 2, p. 487. Edinburgh University Press.Google Scholar
Chasseriaux, J. M., Debrie, R. & Renard, C. 1972 J. Plasma Phys. 8, 231.CrossRefGoogle Scholar
Fisher, R. K. & Gould, R. W. 1970 Phys. Lett. A 31, 235.CrossRefGoogle Scholar
Fredricks, R. W. 1968 a J. Plasma Phys. 2, 197.CrossRefGoogle Scholar
Fredricks, R. W. 1968 b J. Plasma Phys. 2, 365.CrossRefGoogle Scholar
Gradshteyn, I. S. & Ryzhik, I. M. 1965 Table of Integrals. Academic.Google Scholar
Quemada, D. 1968 Ondes dans les Plasmas. Paris: Hermann.Google Scholar
Smith, R. L. & Brice, N. M. 1964 J. Geophys. Res. 69, 5029.CrossRefGoogle Scholar
Spitzer, L. 1962 Physics of Fully Ionized Gases (2nd edn.). Interscience.Google Scholar
Storey, L. R. O. 1953 Phil. Trans. A 246, 113.Google Scholar
Storey, L. R. O., Aubry, M. P. & Meyer, P. 1969 Plasma Waves in Space and in the Laboratory, vol. 1, p. 303. Edinburgh University Press.Google Scholar
Stringer, T. E. 1963 Plasma Physics, 5, 89.Google Scholar
Van, Kampen N. G. 1955 Physica, 21, 949.Google Scholar