Analysis and removal of ITER relevant materials and deposits by laser ablation
Analysis and removal of ITER relevant materials and deposits by laser ablation
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通过激光烧蚀分析和去除 ITER 相关材料和沉积物
DOI：
10.1016/j.jnucmat.2014.05.044
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发表时间：
2014-12
影响因子：
3.1
通讯作者：
Hongbin Ding
中科院分区：
文献类型：
--
作者：
Niels Gierse;Philippe Mertens;Ran Hai;Hongbin Ding
聚变装置中面向等离子体的材料上侵蚀壁材料的沉积分析是维持等离子体性能和满足共沉积氚保留方面的安全要求的关键问题之一。激光烧蚀对等离子体表面材料的损害最小，是一种有前途的原位监测和去除沉积物的方法，特别是对于等离子体放电等其他清洁方法难以到达的等离子体阴影区域。它需要烧蚀过程的信息和烧蚀阈值来定量分析并有效去除不同的沉积物。本文对 ITER 相关材料、石墨、钨、铝（作为铍的替代品）和混合沉积物的行为进行了系统的实验室实验分析，这些沉积物被不同能量密度（1–27 J/cm2，功率密度 0.3–3.9 GW/cm2）的 Nd:YAG 激光（1064 nm）烧蚀。通过磁控溅射和电弧等离子体沉积在 W 基底上沉积由 W-Al-C 层组成的混合沉积物。目的是通过研究大块材料和沉积物的烧蚀效率和烧蚀阈值，选择适当的参数进行定量分析和激光去除沉积物。纯材料和混合材料的烧蚀和饱和能量阈值的比较表明，混合层的烧蚀阈值取决于组分的浓度。我们建议使用激光诱导击穿光谱来确定沉积物的元素成分，然后选择用于层去除的激光参数。实验室定量分析结果与 TEXTOR 定量分析结果的比较显示出合理的一致性。研究了光谱对等离子体参数和环境气压的依赖性。
The analysis of the deposition of eroded wall material on the plasma-facing materials in fusion devices is one of the crucial issues to maintain the plasma performance and to fulfill safety requirements with respect to tritium retention by co-deposition. Laser ablation with minimal damage to the plasma facing material is a promising method for in situ monitoring and removal of the deposition, especially for plasma-shadowed areas which are difficult to reach by other cleaning methods like plasma discharge. It requires the information of ablation process and the ablation threshold for quantitative analysis and effective removal of the different deposits. This paper presents systemic laboratory experimental analysis of the behavior of the ITER relevant materials, graphite, tungsten, aluminum (as a substitution of beryllium) and mixed deposits ablated by a Nd:YAG laser (1064 nm) with different energy densities (1–27 J/cm2, power density 0.3–3.9 GW/cm2). The mixed deposits consisted of W–Al–C layer were deposited on W substrate by magnetron sputtering and arc plasma deposition. The aim was to select the proper parameters for the quantitative analysis and for laser removal of the deposits by investigating the ablation efficiency and ablation threshold for the bulk materials and deposits. The comparison of the ablation and saturation energy thresholds for pure and mixed materials shows that the ablation threshold of the mixed layer depends on the concentration of the components. We propose laser induced breakdown spectroscopy for determination of the elemental composition of deposits and then we select the laser parameters for the layer removal. Comparison of quantitative analysis results from laboratory to that from TEXTOR shows reasonable agreements. The dependence of the spectra on plasma parameters and ambient gas pressure is investigated.
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影响因子：
3.4
作者：
R. Russo;X. Mao;Chunyi Liu;Jhanis J. González
通讯作者：
R. Russo;X. Mao;Chunyi Liu;Jhanis J. González
影响因子：
3.2
作者：
A. Semerok;S. Fomichev;J. Weulersse;F. Brygo;P. Thro;C. Grisolia
通讯作者：
A. Semerok;S. Fomichev;J. Weulersse;F. Brygo;P. Thro;C. Grisolia
DOI：
10.1201/b11497-5
发表时间：
2012
期刊：
--
影响因子：
--
作者：
H. Telle;Á. G. Ureña
通讯作者：
H. Telle;Á. G. Ureña
影响因子：
2.9
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
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
影响因子：
3.1
作者：
Anghel, A.;Porosnicu, C.;Roth, J.
通讯作者：
Roth, J.