ITER朗缪尔探针系统初步设计与研制

根据ITER朗缪尔探针系统的测量需求开展了探针系统的初步设计和部分研制工作。通过对探针系统测量需求的细化分析，确定了不同等离子体参数的测量方式和对应的探针工作模式；并对探针开展了结构设计和热结构分析，得到了探针在稳态10MW·m^-2热负载条件下的温度和应力分布，同时根据ITER真空材料手册，初步确定选用锻造钨材料加工制造探针体和探针屏蔽结构并开展了机加工工艺、焊接工艺等方面的研究。根据探针系统测量需求和工作模式对电子学系统，包括电源、模式切换模块和信号调理单元等，进行了设计分析，且电源技术验证样机正在研制。测控系统已完成初步设计，主要功能包括下发配置、状态监控、校准、数据采集、与ITER CODAC通讯、实时测量偏滤器靶板离子流通量等。

Preliminary design and development of ITER divertor Langmuir probe system

According to the measurement requirements of ITER Langmuir probe system, the preliminary design and partial development of the probe system are carried out. The measurement methods of different plasma parameters and the corresponding probe system operation modes are determined by the detailed physics analysis of the probe system measurement requirements. Temperature field and stress field under 10MW×m^-2 steady-state heat load of Langmuir probe are obtained by structural design, thermal and mechanical simulation. Meanwhile, based on ITER vacuum material handbook, the preliminary selection of probe and shield material is forged tungsten, and the machining processing technology and welding technology were studied. According to the measurement requirements of probe system and operation modes, the design and analysis of power supply, probe operation modes switching and signal conditioning unit are carried out for the electronics system, and the technical verification prototype of power supply is being developed. The preliminary design of the instrument and control system has been completed, of which the main functions include command dispatching, state monitoring, calibration, data acquisition, communication with ITER CODAC and real-time measurement of ion flux on divertor target.