Abstract
Single-bubble sonoluminescence involves the focusing of acoustic energy by a single bubble to produce light. Most successful sonoluminescence experiments are conducted in liquid water around standard atmospheric conditions. Recent numerical work has shown that water vapor trapped in the interior limits the peak temperatures produced in the bubble interior. The water vapor has a low specific heat ratio reducing the amount of compression heating, and endothermic chemical reactions absorb much of the focused acoustic energy. To overcome these problems, a system of gaseous helium dissolved in liquid argon is investigated. In this system the bubble interior is always a monatomic gas, therefore compression heating is maximized. Regions of stability (with respect to shape perturbations and rectified diffusion) are determined for single bubbles. It is of interest to determine whether the peak temperatures achieved can be significantly increased relative to experiments in water. [This work was supported by NSF and LLNL.]
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