Title :
Detection of ultrafine particles in ultrapure water by laser-induced breakdown acoustic effect
Author :
Sawada, T. ; Kitamori, T.
Author_Institution :
Dept. of Ind. Chem., Tokyo Univ., Japan
Abstract :
Intense acoustic emission from an ultrafine particle in liquids, induced by pulsed laser irradiation, has been observed. A novel method in which ultrafine particles are counted individually by counting the breakdown acoustic pulses is proposed, and its counting principle is verified using polystyrene ultrafine particles. As well as the favourable detectable particle size, this method has other merits; e.g. miscounts due to micro air bubbles can be avoided and particle size can be measured. The principle of the laser breakdown acoustic method and its application to counting ultrafine particles in ultrapure water are described
Keywords :
acoustic emission; laser beam effects; photoacoustic effect; acoustic emission; laser-induced breakdown acoustic effect; micro air bubbles; photoacoustic effect; polystyrene; ultrafine particles; ultrapure water; Acoustic applications; Acoustic emission; Acoustic measurements; Acoustic pulses; Acoustic signal detection; Electric breakdown; Liquids; Optical pulses; Particle measurements; Size measurement;
Conference_Titel :
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.1988.49470
