Study of the feasibility of applying laser-induced breakdown spectroscopy for in-situ characterization of deposited layers in fusion devices
Study of the feasibility of applying laser-induced breakdown spectroscopy for in-situ characterization of deposited layers in fusion devices
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DOI：
10.1088/0031-8949/2011/t145/014028
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发表时间：
2011-12
期刊：
影响因子：
2.9
通讯作者：
A. Huber;B. Schweer;V. Philipps;R. Leyte-Gonzales;N. Gierse;M. Zlobinski;S. Brezinsek;V. Kotov;P. Mertens;U. Samm;G. Sergienko
中科院分区：
文献类型：
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作者：
A. Huber;B. Schweer;V. Philipps;R. Leyte-Gonzales;N. Gierse;M. Zlobinski;S. Brezinsek;V. Kotov;P. Mertens;U. Samm;G. Sergienko
本文提出了激光诱导击穿光谱 (LIBS) 的可行性研究，用于开发用于表征聚变装置中面向等离子体的组件上的沉积层的原位诊断。优选地，LIBS将在存在环形磁场和高真空条件下应用。激光能量密度对激光诱导等离子体参数的影响，以及相应对发射光子数量和 LIBS 方法再现性的影响，已在实验室实验和 TEXTOR 中对细晶石墨 (EK98) 以及涂有碳和含金属沉积物的块状钨样品进行了研究。在 TEXTOR 上研究了 2×10–4 Pa 至 10 Pa 范围内的磁场和环境压力对 LIBS 技术产生的碳等离子体羽流的影响。讨论了将该方法应用于 ITER 的可能性。
This paper presents a feasibility study of laser-induced breakdown spectroscopy (LIBS) for the development of an in-situ diagnostic for the characterization of deposition layers on plasma-facing components in fusion devices. Preferentially, LIBS would be applied in the presence of a toroidal magnetic field and under high vacuum conditions. The impact of the laser-energy densities on the laser-induced plasma parameters and correspondingly on the number of emitted photons and on the reproducibility of the LIBS method has been studied in laboratory experiments and in TEXTOR on fine-grain graphite (EK98) as well as on bulk W samples coated with carbon and metallic-containing deposits. The effect of magnetic fields and of ambient pressures in the range from 2×10–4 Pa to 10 Pa on the carbon plasma plume produced by the LIBS technique has been studied on TEXTOR between plasma pulses. The possibility of applying this method to ITER is discussed.