Boosting Sonoluminescence with a High-Intensity Ultrasonic Pulse Focused on the Bubble by an Adaptive Array

Jean-Louis Thomas, Yoël Forterre, and Mathias Fink
Phys. Rev. Lett. 88, 074302 – Published 1 February 2002
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Abstract

Single-bubble sonoluminescence is characterized by a great concentration of energy during the collapse of a gas bubble, which leads to the generation of photons from low-frequency ultrasound. The narrow stability domain of sonoluminescence has limited previous attempts to reinforce this inertial confinement in order to generate photons of higher energy or to ignite a nuclear fusion reaction. We present a new experimental approach where an ultrasonic pulse of high frequency is adaptively focused on the bubble during the collapse. Using an array of eight transmitters, a pressure pulse of 0.7 MPa doubles the flash intensity; this technique can easily be extended to higher pressure.

  • Received 29 June 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.074302

©2002 American Physical Society

Authors & Affiliations

Jean-Louis Thomas, Yoël Forterre*, and Mathias Fink

  • Laboratoire Ondes et Acoustique, CNRS, ESPCI, Université Denis Diderot, 10 rue Vauquelin, 75231 Paris, France

  • *Present address: Institut Universitaire des Systèmes Thermiques et Industriels, 5 rue Enrico Fermi, 13453 Marseille Cedex 13, France.

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Vol. 88, Iss. 7 — 18 February 2002

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