High power ultrasound for acoustic source applications

Mackersie, J.W. and Timoshkin, I. and MacGregor, S.J.; (2004) High power ultrasound for acoustic source applications. In: Proceedings of the 26th international power modulator symposium and 2004 high voltage workshop. IEEE, USA, pp. 458-461. ISBN 0780385861 (https://doi.org/10.1109/MODSYM.2004.1433612)

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Abstract

High Power Ultrasound (HPU) can be generated by the application of Pulsed Power Technology to produce acoustic waves of high power and bandwidth. A study was conducted into the variation of the amplitude and frequency content of the acoustic signal with the applied voltage, pulse energy and electrode separation. Measurements indicate that, for a given electrode separation, whilst there is some increase in the amplitude of the detected acoustic emission with an increase in the electrical pulse energy it is only a modest effect. For a given pulse energy a considerably greater increase in the acoustic signal is observed when the distance between the electrodes is extended - thereby increasing the size of the signal source. The maximum amplitude of the detected signal approximately varies as the electrode separation to the power of (2)/(3). At large separations the delay time between the application of the voltage pulse and the breakdown of the water is considerable thus allowing energy loss through ionic conduction in the water.

ORCID iDs

Mackersie, J.W. ORCID logoORCID: https://orcid.org/0000-0002-4471-9418, Timoshkin, I. ORCID logoORCID: https://orcid.org/0000-0002-0380-9003 and MacGregor, S.J. ORCID logoORCID: https://orcid.org/0000-0002-0808-585X;
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