Acoustic testing in a very small space based on a point sound source generated by laser-induced breakdown

Stabilization of plasma formation

Naoki Hosoya, Masaki Nagata, Itsuro Kajiwara

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

This paper proposes a method of acoustic testing based on a point source generated by laser-induced breakdown in air. A high-power neodymium-yttrium- aluminum-garnet pulse laser is used in this system for generating the laser-induced breakdown in acoustic fields. Plasma formation can be realized by the laser-induced breakdown if the local intensity of the laser beam reaches 1015 W/m2. The shock wave that is yielded by consuming a part of the plasma energy becomes a sound source. Assuming that the laser beam is focused to a small volume through a convex lens and the sound source by the laser induced-breakdown has nondirectional property, it is possible to create a point source with this technique. Securing the laser light path installs no device for acoustic excitation in acoustic fields. The system is validated by comparing the resonant frequencies of a very small space measured by the laser-induced breakdown and calculated by theoretical model.

Original languageEnglish
Pages (from-to)4572-4583
Number of pages12
JournalJournal of Sound and Vibration
Volume332
Issue number19
DOIs
Publication statusPublished - 2013 Sep 16

Fingerprint

Stabilization
stabilization
breakdown
Acoustics
Acoustic waves
Plasmas
acoustics
Lasers
Testing
lasers
Acoustic fields
Laser beams
point sources
laser beams
Neodymium
acoustic excitation
Garnets
Yttrium
Shock waves
neodymium

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Acoustic testing in a very small space based on a point sound source generated by laser-induced breakdown : Stabilization of plasma formation. / Hosoya, Naoki; Nagata, Masaki; Kajiwara, Itsuro.

In: Journal of Sound and Vibration, Vol. 332, No. 19, 16.09.2013, p. 4572-4583.

Research output: Contribution to journalArticle

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