期刊
PLASMA SCIENCE & TECHNOLOGY
卷 17, 期 11, 页码 953-957出版社
IOP PUBLISHING LTD
DOI: 10.1088/1009-0630/17/11/12
关键词
DP-LIBS; carbon; signal detection; iron-based alloy
资金
- National Natural Science Foundation of China [51374040]
- National Key Scientific Instrument and Equipment Development Project of China [2014YQ120351]
Although single-pulse lasers are often used in traditional laser-induced breakdown spectroscopy (LIBS) measurements, their measurement outcomes are generally undesirable because of the low sensitivity of carbon in iron-based alloys. In this article, a double-pulse laser was applied to improve the signal intensity of carbon. Both the inter-pulse delay and the combination of laser wavelengths in double-pulse laser-induced breakdown spectroscopy (DP-LIBS) were optimized in our experiment. At the optimized inter-pulse delay, the combination of a first laser of 532 nm and a second laser of 1,064 nm achieved the highest signal enhancement. The properties of the target also played a role in determining the mass ablation enhancement in DP-LIBS configuration.
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