Extreme electrostatic phenomena in a single sonoluminescing bubble

A multihydrodynamic model is established to simulate a sonoluminescing argo n bubble. The results show that a partially ionized plasma layer is generat ed and contributes to the flash by assumed thermal bremsstrahlung. A strong electric field of up to 2 x 10(10) V/m, caused by the plasma dipole diffus ion, emerges along the shock front. The spike of the electric field helps p revent the occurrence of Rayleigh-Taylor instability and thus maintains per fect spherical symmetry of the shocks. This may be a key reason for the ove r 12 orders of magnitude sound-energy concentration.