Plasma formation and temperature measurement during single-bubble cavitation

David J. Flannigan and Kenneth S. Suslick ()
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David J. Flannigan: University of Illinois at Urbana-Champaign
Kenneth S. Suslick: University of Illinois at Urbana-Champaign

Nature, 2005, vol. 434, issue 7029, 52-55

Abstract: The sound of science The phenomenon known as single-bubble sonoluminescence (SBSL) has been the focus of intense investigation since it was discovered 15 years ago, leading to predictions that extreme temperatures are reached within the cavity at extreme compression. Conditions, some have controversially claimed, that could even lead to nuclear fusion. The lack of features in the typical SBSL spectrum has made it difficult to establish what is happening within the bubble. But now, using concentrated sulphuric acid as the medium subjected to acoustic treatment, Flannigan and Suslick have obtained the most intense sonoluminescence yet seen. This provides plenty of spectral information — most importantly, evidence for temperatures as high as 15,000 K — indicating that the collapsed bubble has a hot plasma core.

Date: 2005
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DOI: 10.1038/nature03361

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