Stimulated Radiation from Strong Langmuir Turbulence in Ionospheric Modification

New measurements of stimulated electromagnetic emissions (SEE) in low duty cycle heating experiments performed at the HIPAS Observatory are presented. Two distinct types of spectra, a weak diffuse type and a stronger type with deep frequency modulations, were observed. These results have been compar...

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Veröffentlicht in:	Physical Review Letters 1997-08, Vol.79 (7), p.1273-1276
Hauptverfasser:	Cheung, P. Y., Mjølhus, E., DuBois, D. F., Pau, J., Zwi, H., Wong, A. Y.
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION DIFFUSION HEATING LANGMUIR FREQUENCY MODIFICATIONS NUMERICAL ANALYSIS SPECTRA STIMULATED EMISSION TURBULENCE
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container_end_page	1276
container_issue	7
container_start_page	1273
container_title	Physical Review Letters
container_volume	79
creator	Cheung, P. Y. Mjølhus, E. DuBois, D. F. Pau, J. Zwi, H. Wong, A. Y.
description	New measurements of stimulated electromagnetic emissions (SEE) in low duty cycle heating experiments performed at the HIPAS Observatory are presented. Two distinct types of spectra, a weak diffuse type and a stronger type with deep frequency modulations, were observed. These results have been compared with numerical predictions from a 1D driven and damped Zakharov model and are found to be consistent with Langmuir collapse processes (strong spectra) and Langmuir turbulence of the coexistence type (weak spectra). Through this joint experimental and numerical study, evidence of strong Langmuir turbulence via SEE measurements has been demonstrated. {copyright} {ital 1997} {ital The American Physical Society}
doi_str_mv	10.1103/PhysRevLett.79.1273
format	Article
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subjects	70 PLASMA PHYSICS AND FUSION DIFFUSION HEATING LANGMUIR FREQUENCY MODIFICATIONS NUMERICAL ANALYSIS SPECTRA STIMULATED EMISSION TURBULENCE
title	Stimulated Radiation from Strong Langmuir Turbulence in Ionospheric Modification
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