On the choice of materials for the first mirrors of plasma diagnostics in a fusion reactor
On the choice of materials for the first mirrors of plasma diagnostics in a fusion reactor
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DOI：
10.1016/s0022-3115(98)00129-9
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发表时间：
1998-10
影响因子：
3.1
通讯作者：
V. Voitsenya;A. F. Bardamid;V. Gritsyna;V. Konovalov;O. Motojima;D. Orlinskij;R. Palladino;B. Peterson;A. N. Shapoval;A. F. Shtan;S. I. Solodovchenko;K. Yakimov;K. Young
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文献类型：
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作者：
V. Voitsenya;A. F. Bardamid;V. Gritsyna;V. Konovalov;O. Motojima;D. Orlinskij;R. Palladino;B. Peterson;A. N. Shapoval;A. F. Shtan;S. I. Solodovchenko;K. Yakimov;K. Young
本文研究了用ECR等离子体氢或氘离子长时间溅射不同金属（Al，Cu，Mo，Ta，W）制成的反射镜在0.25-0.65 μm波长范围内的反射系数R，并测量了R值与溅射层厚度的关系。对于铜反射镜，详细研究了离子能量和离子能谱对反射率的影响。由于发现了强烈的效应，因此使用具有宽能量分布（0.1-1.5 keV）的离子进行了由不同金属制成的反射镜的比较试验，以更充分地模拟聚变反应堆环境条件。结果表明，除Al外，其它金属的反射率系数随溅射层厚度的减小速率基本相同。因此，由具有较低溅射系数Y的材料制成的反射镜将承受较高的电荷交换原子注量，与作者先前提出的R/Y准则定性一致。
The reflectivity coefficient, R, of mirrors fabricated from different metals (Al, Cu, Mo, Ta, W) in the wavelength range 0.25–0.65 μm was investigated under long-term sputtering with ions of ECR plasma of hydrogen or deuterium, and R values versus thickness of sputtered layer were measured. For copper mirrors the influence of ion energy and ion energy spectrum on optical reflectivity was investigated in detail. Because a strong effect was found, the comparative test of mirrors made of different metals was carried out using ions with a wide energy distribution (0.1–1.5 keV) to have a more adequate simulation of fusion reactor environment conditions. The results obtained show that, with the exception of Al, the decrease of reflectivity coefficient with thickness of sputtered layer has approximately similar rate for metal tested. Thus, mirrors made of materials having lower sputtering coefficient, Y, will withstand a higher charge exchange atom fluence, in qualitative agreement with R/Y criterion suggested by the authors earlier.