In the final few years of his life, Julian Schwinger proposed that the “dynamical Casimir effect” might provide the driving force behind the puzzling phenomenon of sonoluminescence. Motivated by that exciting suggestion, we have computed the static Casimir energy of a spherical cavity in an otherwise uniform material. As expected the result is divergent; yet a plausible finite answer is extract...

Single cavitation bubble luminescence induced by laser in contrast to single bubble sonoluminescence has no need in a sound field for a strong collapse and for light emission. The cavitation bubbles are produced by focused laser light and make the single strong collapse. As shown experimentally, the number of emitted photons from cavitation luminescence is much greater than it was observed in s...

This study examines the spatial distribution of various properties attributed to the cavitation field generated by a shock wave lithotripter. These properties include acoustic emission and sonoluminescence, which result from violent bubble collapse, and the degree of cell lysis in vitro, which appears to be related to cavitation. The acoustic emission detected with a 1 MHz, 12 cm diameter focus...

Sonoluminescence from alkali-metal salt solutions has been studied because emission mechanism from non-volatile alkali-metal ions has been interested. We measured multi-bubble sonoluminescence spectra from KCl solutions saturated with Ar, Xe and He gases at temperatures in the range of 15 40 °C at the frequency of 148 kHz. For Arsaturated solutions, the spectral line width of K atom emission, w...

Submitted for the MAR11 Meeting of The American Physical Society On segregation of noble gases in water-based Single Bubble Sonoluminescence MOGENS LEVINSEN, Niels Bohr Institute, Univ. of Copenhagen — A long-standing issue in the field of long time stable water based single bubble sonoluminescence has been the close similarity of the spectra to that of blackbody radiation. Looking for the effe...

A systematic study of the energy loss of a cavitation bubble in a close proximity of a glass surface is introduced for the first time in a low acoustic field (1.2-2.4 bar). Single bubble sonoluminescence (SBSL) is used as a tool to predict the temperature and pressure decrease of bubble (μm) versus surface distance. A glass as a model system is used to imitate the boundary conditions relevant f...