Statistical analysis of spectra of acoustic signals from laser breakdown initiated on monodispersed solid aerosol particles

Sergei V. Shamanaev

doi:10.1117/12.411948

29 December 2000 Statistical analysis of spectra of acoustic signals from laser breakdown initiated on monodispersed solid aerosol particles

Sergei V. Shamanaev

Author Affiliations +

Proceedings Volume 4341, Seventh International Symposium on Atmospheric and Ocean Optics; (2000) https://doi.org/10.1117/12.411948
Event: 7th International Symposium on Atmospheric and Ocean Optics, 2000, Tomsk, Russian Federation

Abstract

The results of statistical analysis of the spectra of acoustic signals radiated by local plasma formations initiated on single 400-micrometer SiO₂ and 170-micrometer SiCO₂ particles and on an ensemble of 7- and 28-micrometer monodisperse SiC particles upon exposure to radiation from a pulsed GOS-1001 laser with a wavelength of 1.06 micrometer are presented. A clearly pronounced wide maximum is typical of the spectra of acoustic pulse radiated by a plasma formation initiated on a single solid aerosol particle. The frequency of this maximum is shown to be dependent on the duration and shape of the radiated sound pulse. The total acoustic signal radiated by discrete plasma formations initiated on an ensemble of monodisperse particles injected in the laser beam caustic region represents a linear superposition of pulses from separate plasma formations. Its spectrum also has a wide maximum, whose amplitude and halfwidth are determined by the number of local plasma formations and the rms amplitude of acoustic pulses from separate plasma formations. The frequency of this maximum is shown to be dependent on durations and shapes of pulses from separate plasma formations.

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Sergei V. Shamanaev "Statistical analysis of spectra of acoustic signals from laser breakdown initiated on monodispersed solid aerosol particles", Proc. SPIE 4341, Seventh International Symposium on Atmospheric and Ocean Optics, (29 December 2000); https://doi.org/10.1117/12.411948

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