Direct observations of single sonoluminescence pulses
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Previous reports have described experimental measurements and theoretical descriptions of sonoluminescence without clearly resolving the physical events that underlie this phenomenon. Although incomplete, these results have led to suggestions that sonoluminescence might be such an extreme process that it could serve as an unusual inertial confinement source of fusion neutrons. Such a possibility depends on physical details of individual sonoluminescence events such as the source temperature, diameter, and density. The present report describes attempts to measure the diameter and duration of single sonoluminescence flashes. In both cases the results were limited by the resolution of the instruments, giving diameters of the order of 3 ltm or less and durations of the order of 12 ps, or less.
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Lentz, W.J.; Atchley, Anthony A.; Gaitan, D. Felipe (1995-05);A single bubble of air in water can emit pulses of blue-white light that have durations of less than 50 ps while it is oscillating in an acoustic standing wave. The emission is called sonoluminescence. A knowledge of the ...
Van Petten, Thomas Louis (Monterey, California. Naval Postgraduate School, 1988);Heat transfer measurements were made for filmwise condensation of R-113, steam and ethylene glycol on three sets of finned tubes which differed only in root diameter. The fin root diameters were 12.7 mm. 19.05 mm and 25.0 ...
Gaitan, D. Felipe; Atchley, Anthony A.; Lewia, S.D.; Carlson, J.T.; Maruyama, X.K.; Moran, Michael; Sweider, Darren (1996-07);A single gas bubble, acoustically levitated in a standing-wave field and oscillating under the action of that field, can emit pulses of blue-white light with duration less than 50 ps. Measurements of the spectrum of ...