ABLATION STUDIES OF Y-BA-CU-OXIDE IN OXYGEN USING A PULSED CO2-LASER

被引：5

作者：

DYER, PE

KEY, PH

MONK, P

机构：

[1] Department of Applied Physics, University of Hull, Hull

来源：

APPLIED SURFACE SCIENCE | 1992年 / 54卷

关键词：

D O I：

10.1016/0169-4332(92)90037-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The depth of ablation of Y-Ba-Cu-oxide pellets as a function of pulsed CO2 laser fluence has been measured. Up to fluences of approximately 5 J cm-2 the data can be well fitted to a Beer's law dependence with absorption coefficient alpha = 10(4) cm-1 and threshold fluence for ablation of 0.85 J cm-2. At higher fluences a self-regulating ablation rate regime, due to plasma formation, is encountered. Particulate deposits from 10.6-mu-m laser ablation are found to be much greater than with shorter wavelengths and evidence of large particle formation by accretion of smaller ablation products is observed. The range of the ablation plume in low pressure oxygen has been studied as a function of laser fluence, irradiation spot size and ambient gas pressure and is compared with modelling.

引用

页码：160 / 165

页数：6

共 8 条

[1] EFFECT OF IMPURITIES ON LASER-INDUCED AIR BREAKDOWN AT 1.06MU [J].