Detection efficiency of microparticles in laser breakdown water analysis

被引：16

作者：

Saito, M ^{[1
]}

Izumida, S ^{[1
]}

Onishi, K ^{[1
]}

Akazawa, J ^{[1
]}

机构：

[1] Ryukoku Univ, Dept Elect & Informat, Otsu, Shiga 5202194, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 09期

关键词：

D O I：

10.1063/1.370137

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polystyrene and silica particles in pure water were successfully detected to a size as small as 0.04 mu m by the laser breakdown method. In conventional experimental conditions, detection efficiency has been extremely low, since breakdown occurs only when a particle happens to be present in a narrow focal region during a short laser pulse duration. Through the use of a long focal length lens, which expanded the high power density region without inducing water breakdown around the focal point, efficiency was notably enhanced. Ultrasonic aggregation of particles was also observed to enhance efficiency. (C) 1999 American Institute of Physics. [S0021-8979(99)08009-3].

引用

页码：6353 / 6357

页数：5

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