Abstract:

Physics requirements analysis and structure design of ITER divertor Langmuir probes are performed, and the installation height range of probe relative to the surface of the divertor monoblock is determined. Temperature field and stress field under steady state heat load of Langmuir probe are obtained by the structure design and the thermal and mechanical simulation. The maximum temperature of probe is lower than that of divertor monoblock, and the stress of Langmuir probe is lower than the yield strength of the material. At the same time, probe manufacture and connection technology are explored and developed. The forged tungsten material is selected initially to make probe body and tungsten shield. The aluminum oxide ceramic is used between the probe body and the tungsten shield for insulation, and special technology is used for bonding probe body, ceramic and tungsten shield.

Key words: ITER, Divertor, Langmuir probe

摘要：

对ITER 偏滤器朗缪尔探针进行了物理需求分析和结构设计，确定了探针离偏滤器靶板瓦表面的高度范围。通过结构设计和模拟仿真，得到了探针在稳态热负载条件下的温度场分布和应力状况，探针的最高温度低于相应的偏滤器靶板瓦最高温度，探针各个部件的应力低于材料的屈服强度。同时对探针进行了加工工艺和连接工艺的探索研发，初步确定探针体和钨屏蔽结构选用锻造钨材料，而且使用锻造钨试制了探针体和钨屏蔽结构。探针体与钨屏蔽结构之间使用氧化铝陶瓷绝缘，并使用特殊的工艺连接探针体、陶瓷和钨屏蔽结构。

关键词: ITER, 偏滤器, 朗缪尔探针