HT-7等离子体辐照后金属第一镜表面特性研究

主要研究多晶钨、钼、不锈钢等金属第一镜在HT-7超导托卡马克等离子体辐照后的表面特性变化.金属第一镜直接安装在装置内部第一壁的不同位置,试验后通过对镜面反射率和第一镜表面形貌、成分的测量,研究不同材料第一镜的表面特性变化.通过对试验结果的分析,发现三种材料的第一镜漫反射率变化都较大,钨材料第一镜的镜面反射率变化是三者中最小的,样品周围加热系统决定了附近第一镜的表面特性变化趋势.     

微电路模块板级磁芯组装失效机理与工艺设计

板级磁芯是国防军工及航空航天领域使用的微电路模块的重要组成部分,其组装的可靠性对产品性能起着至关重要的作用。为从根源上解决板级磁芯粘接的可靠性问题,文中通过分析板级磁芯粘接失效机理,创新性地引入可靠的磁芯粘接胶和新的灌封工艺设计,对磁芯粘接胶和灌封工艺进行针对性的探索;并采用含玻珠的新磁芯粘接胶对板级磁芯进行粘接,淘汰真空浸入式灌封而采用新的旋转灌封工艺,形成高可靠的板级磁芯组装工艺技术,彻底地解决板级磁芯粘接面开裂的问题。研究得出：板级磁芯组装失效的根源是磁芯粘接力不足以抵抗环境试验和产品内部的灌封胶应力,采用新型板级磁芯粘接胶、改进灌封方式和磁芯填充工艺是避免板级磁芯组装失效的有效工艺途径。     

Influence of Long-Term Plasma Irradiation on Metallic First Mirrors in HT-7 Tokamak

The first mirror （FM） samples made of polycrystal （PC） stainless steel （SS）, molybdenum （Mo） and tungsten （W） were mounted at different locations in HT-7 tokamak to investigate the surface modifications caused by erosion and deposition. The optical transmission characteristics of first mirror samples were measured by a spectrophotometer. It was found that different irradiation environment had different influences on the first mirror surfaces, especially with wave antenna nearby. In addition, the erosion made the reflectivity of FM degrade to some extents as a whole. But the deposition on the mirror influences more than erosion does. Comparing the mirrors of SS, W and Mo, irradiated in the same environment, the W-mirror had the least changes in reflectivity with regularity, while the SS-mirror had most serious changes.