First tests of molybdenum mirrors for ITER diagnostics in DIII-D divertor
First tests of molybdenum mirrors for ITER diagnostics in DIII-D divertor
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DOI：
10.1063/1.2336465
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发表时间：
2006-10
影响因子：
1.6
通讯作者：
D. Rudakov;J. Boedo;R. Moyer;A. Litnovsky;V. Philipps;P. Wienhold;S. Allen;M. Fenstermacher;
中科院分区：
文献类型：
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作者：
D. Rudakov;J. Boedo;R. Moyer;A. Litnovsky;V. Philipps;P. Wienhold;S. Allen;M. Fenstermacher;
国际热核实验堆将使用金属镜进行不同光谱范围的光学诊断。由于腐蚀、沉积和粒子注入，它们的光学性质将随时间而改变。钼镜的第一次测试是在DIII-D偏滤器中在沉积主导条件下进行的。两组镜子凹下偏滤器地板下2厘米的私人通量区域暴露于一系列相同的，较低的单零，ELMing（具有边缘局部模式）H模式放电与分离的等离子体条件下，在两个偏滤器腿。第一组镜子暴露在环境温度下，而第二组则预热到140至80°C之间的温度。在曝光过程中，两组镜子都被等离子体的辐射加热。未加热的镜子表现出净碳沉积率高达3.7nm闪烁，并遭受了显着的反射率下降。预热后的反射镜的净碳沉积速率降低了30-100倍，并且它们的反射率降低了10%。
Metallic mirrors will be used in ITER for optical diagnostics working in different spectral ranges. Their optical properties will change with time due to erosion, deposition, and particle implantation. First tests of molybdenum mirrors were performed in the DIII-D divertor under deposition-dominated conditions. Two sets of mirrors recessed 2cm below the divertor floor in the private flux region were exposed to a series of identical, lower-single-null, ELMing (featuring edge localized modes) H-mode discharges with detached plasma conditions in both divertor legs. The first set of mirrors was exposed at ambient temperature, while the second set was preheated to temperatures between 140 and 80°C. During the exposures mirrors in both sets were additionally heated by radiation from the plasma. The nonheated mirrors exhibited net carbon deposition at a rate of up to 3.7nm∕s and suffered a significant drop in reflectivity. Net carbon deposition rate on the preheated mirrors was a factor of 30–100 lower and their...