关键词: ITER, 偏滤器, 朗缪尔探针

Abstract: 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.

Key words: ITER, Divertor, Langmuir probe