Express-diagnostics of a crater growth on laser plasma materials processing

Abstract

Acoustic emission of a zone of the destruction formed during influence of pulse laser radiation on a surface of metal is considered. Dependence of the time form of acoustic fluctuations on parameters of an irradiated material and the law of increase in depth of a crater was estimated. It is revealed, that at action on a surface of the copper sample of a laser impulse duration ∼ 20 µC time of growth of a zone of destruction makes approximately 40 MKC, that will well be coordinated with time of existence of plasma formation at a surface of the target exposed to laser-plasma processing (∼ 50 µC).