Reflective metallic coatings for first mirrors on ITER
Reflective metallic coatings for first mirrors on ITER
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DOI：
10.1016/j.fusengdes.2010.12.038
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发表时间：
2011-10
影响因子：
1.7
通讯作者：
B. Eren;L. Marot;A. Litnovsky;M. Matveeva;R. Steiner;V. Emberger;M. Wisse;D. Mathys;G. Covarel;E. Meyer
中科院分区：
文献类型：
--
作者：
B. Eren;L. Marot;A. Litnovsky;M. Matveeva;R. Steiner;V. Emberger;M. Wisse;D. Mathys;G. Covarel;E. Meyer
金属反射镜预计将在热核实验堆的所有光学诊断中发挥关键作用。因此，开发可靠的技术来生产能够在恶劣的ITER环境中保持其光学性能的反射镜是非常重要的。采用磁控溅射和蒸发技术，制备了用于托卡马克实验的Rh和Mo薄膜。从化学成分、表面粗糙度、微晶结构、反射率和附着力等方面对薄膜进行了表征。沉积后的表面未检测到杂质。研究了沉积参数和衬底温度对微晶结构、表面粗糙度以及反射率的影响。结果表明，薄膜为纳米晶，具有致密的柱状结构。微晶柱之间的开放边界，有时会在蒸发后出现，与Rh或Mo参照物相比，被发现降低了反射率。
Metallic mirrors are foreseen to play a crucial role for all optical diagnostics in ITER. Therefore, the development of reliable techniques for the production of mirrors which are able to maintain their optical properties in the harsh ITER environment is highly important. By applying magnetron sputtering and evaporation techniques, rhodium and molybdenum films have been prepared for tokamak tests. The films were characterised in terms of chemical composition, surface roughness, crystallite structure, reflectivity and adhesion. No impurities were detected on the surface after deposition. The effects of deposition parameters and substrate temperature on the resulting crystallite structure, surface roughness and hence on the reflectivity, were investigated. The films are found to exhibit nanometric crystallites with a dense columnar structure. Open boundaries between the crystallite columns, which are sometimes present after evaporation, are found to reduce the reflectivity as compared to rhodium or molybdenum references.