Wu Ding, Sun Liying, Liu Ping, Hai Ran, Ding Hongbin
12399 School of Physics, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams , Chinese Ministry of Education, Dalian University of Technology, Dalian, China.
Appl Spectrosc. 2018 Feb;72(2):225-233. doi: 10.1177/0003702817738029. Epub 2017 Dec 28.
In this work, emission signals of laser-induced breakdown (LIBS) plasma of a flowing liquid jet in the absence and presence of an air-supported glow discharge have been investigated. In combination with a needle-to-needle glow discharge, a Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser (1064 nm, 5 ns) with power density ∼10W/cm was used to generate a plasma from a liquid jet. Emission lines of Mg, Ca, Al, Li, Na, and K all showed significant enhancements in the presence of the glow discharge. Lower continuum background was also observed. Mechanisms of the line emission enhancement and continuum radiation reduction were discussed.
在这项工作中，研究了在不存在和存在空气支持的辉光放电的情况下，流动液体射流的激光诱导击穿（LIBS）等离子体的发射信号。结合针-针辉光放电，使用功率密度约为10W/cm的调Q掺钕钇铝石榴石（Nd:YAG）激光器（1064nm，5ns）从液体射流中产生等离子体。在辉光放电存在的情况下，Mg、Ca、Al、Li、Na和K的发射线均显示出显著增强。还观察到较低的连续背景。讨论了谱线发射增强和连续辐射降低的机制。
