Shock Wave Emissions of a Sonoluminescing Bubble

Abstract

A single bubble in water is excited by a standing ultrasound wave. At high intensity the bubble starts to emit light. Together with the emitted light pulse, a shock wave is generated in the liquid at collapse time. The time-dependent velocity of the outward-travelling shock is measured with an imaging technique. The pressure in the shock and in the bubble is shown to have a lower limit of 5500 bars. Visualization of the shock and the bubble at different phases of the acoustic cycle reveals previously unobserved dynamics during stable and unstable sonoluminescence.

4 pages, 7 figures

References in corpus (2)

• Sonoluminescing air bubbles rectify argon
• Boosting Sonoluminescence

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• Sonoluminescence as a QED vacuum effect. II: Finite Volume Effects
• The Kirkwood-Bethe hypothesis for bubble dynamics, cavitation and underwater explosions
• An Alternative Method to Deduce Bubble Dynamics in Single Bubble Sonoluminescence Experiments