https://doi.org/10.1140/epjd/e2011-10394-y
Regular Article
Influence of distances between the lens and the target on the characteristic of laser induced lead plasma
College of Physics and Electronics, Shandong Normal
University, Jinan,
250014, P.R.
China
a e-mail: byman@sdnu.edu.cn
Received:
11
July
2010
Received in final form:
28
October
2010
Published online:
9
June
2011
The influence of distances between the lens and a pure lead target on the breakdown spectroscopy of plasmas induced by a Nd:YAG laser ablation was studied at atmospheric pressure. The electron density, the electron temperature and the self-absorption were analysed when the distances were less than the focal length (6.5 cm). The maximal electron density presented at the point 5.8 cm. Moreover, the self-absorption can be observed in all of the wave ranges when the distances are more than the focal length. This phenomenon can be understood by the air breakdown.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2011
