Laser-induced breakdown spectroscopic characterization of tungsten plasma using the first, second, and third harmonics of an Nd:YAG laser

Laser-induced breakdown spectroscopic characterization of tungsten plasma using the first, second, and third harmonics of an Nd:YAG laser
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使用 Nd:YAG 激光器的一次、二次和三次谐波对钨等离子体进行激光诱导击穿光谱表征

DOI:
10.1016/j.jnucmat.2012.09.002
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发表时间:
2013-02
影响因子:
3.1
通讯作者:
Ding, Hongbin
Ding, Hongbin
中科院分区:
工程技术2区
文献类型:
--
作者:
Farid, Nazar;Li, Cong;Wang, Hongbei;Ding, Hongbin

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钨已成为聚变反应堆和面向等离子体组件的重要材料。在大气压下,在1064nm、532nm和355nm处进行了钨的激光烧蚀,以确定激光诱导击穿光谱(LIBS)用于面向等离子体的部件的原位诊断的能力。利用Stark展宽和Boltzmann图分别测量了激光产生的钨等离子体的电子密度和温度。在恒定的激光辐照度(1.05×1015Wm−2)下,最高温度(16,304 K)在1064 nm处达到。最大电子密度(1.12×1018cm−3)出现在355 nm处。还讨论了电子温度和密度随激光辐照度和时间的变化。该工作可为面向等离子体元件诊断中LIBS系统的设计和优化提供重要的参考数据。
Tungsten has become an important material in fusion reactors and plasma-facing components. Laser ablation of tungsten has been carried out at 1064nm, 532nm, and 355nm at atmospheric pressure to determine the capability of laser-induced breakdown spectroscopy (LIBS) for in situ diagnosis of plasma-facing components. Stark broadening and Boltzmann plots were used for the measurement of electron density and temperature, respectively of laser produced tungsten plasma. At a constant laser irradiance (1.05×1015Wm−2) the maximum temperature (16,304K) was reached at 1064nm. Maximum electron density (1.12×1018cm−3) was observed at 355nm. Variations in electron temperature and density as a function of laser irradiance and time are also discussed. This work could provide important reference data for the design and optimization of LIBS systems involved in plasma-facing components diagnostics.
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