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Title: Doppler effect for an optical discharge source of shock waves

Abstract

The Doppler effect for a moving pulsating optical discharge producing periodic shock waves is considered. The manifestations of the effect are limited by the wave merging mechanism. The validity conditions were found for the effect in the case of a pulsating source of shock waves. (interaction of laser radiation with matter. laser plasma)

Authors:
 [1]
  1. Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
21470850
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 35; Journal Issue: 11; Other Information: DOI: 10.1070/QE2005v035n11ABEH010355
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DOPPLER EFFECT; PERIODICITY; PULSES; SHOCK WAVES; VARIATIONS

Citation Formats

Tishchenko, V N. Doppler effect for an optical discharge source of shock waves. United States: N. p., 2005. Web. doi:10.1070/QE2005V035N11ABEH010355.
Tishchenko, V N. Doppler effect for an optical discharge source of shock waves. United States. doi:10.1070/QE2005V035N11ABEH010355.
Tishchenko, V N. Wed . "Doppler effect for an optical discharge source of shock waves". United States. doi:10.1070/QE2005V035N11ABEH010355.
@article{osti_21470850,
title = {Doppler effect for an optical discharge source of shock waves},
author = {Tishchenko, V N},
abstractNote = {The Doppler effect for a moving pulsating optical discharge producing periodic shock waves is considered. The manifestations of the effect are limited by the wave merging mechanism. The validity conditions were found for the effect in the case of a pulsating source of shock waves. (interaction of laser radiation with matter. laser plasma)},
doi = {10.1070/QE2005V035N11ABEH010355},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 11,
volume = 35,
place = {United States},
year = {Wed Nov 30 00:00:00 EST 2005},
month = {Wed Nov 30 00:00:00 EST 2005}
}
  • The acceleration of a plasma jet by an optical pulsating discharge is studied. The optical discharge generated periodic shock waves or shock waves combined in periodic trains. For a pulse repetition rate f > 50 kHz, the line at frequency f dominated in the spectrum of periodic waves. The spectrum of trains following with the frequency F{sub 0} || f contained an ultrasonic component and a low-frequency component. The trains produces a strong acoustic effect. The average power of the waves amounted to 160 W, and the conversion efficiency of laser radiation to shock waves was {approx}10% - 25%. (interactionmore » of laser radiation with matter. laser plasma)« less
  • Gas-dynamic perturbations produced by a pulsating discharge are studied. The mechanism of shock-wave merging and criteria of its manifestation are confirmed. (laser applications and other topics in quantum electronics)
  • The conditions under which an optical pulsed discharge stably generates periodic shock waves are determined theoretically and experimentally. It is shown that the mechanism of merging shock waves into a low-frequency quasi-stationary wave is operative in various gases (and vapours) in a wide range of laser spark energies. The application of such a wave for increasing the coupling factor in a laser engine is considered. (interaction of laser radiation with matter)
  • A gas discharge induced at a frequency of 300 kc was investigated. Under the conditions of the experiment, the shock wave front was found to break away from the current layer. The current distribution in the discharge chamber was determined by the nature of the skin effect for metallic conductors. (auth)
  • The effect of shock waves and the erosion sheath on the emissive properties of a high-current H-compressed discharge is studied with the help of null-contact optical methods: The Topler schlieren (shadow) method, laser sounding, the method of photoelectric detection of radiation in five wavelength ranges, photo-electric detection at two angles to the emitting layer, and the method of high-speed spectroscopy. The role of different factors which distort the form of the light pulse of the discharge is shown and suggestions for decreasing their negative influence are made.