High-Speed Monitoring of Dust Particles in ITER ELMs Simulation Experiments with QSPA Kh-50

Acta Polytechnica

Igor S. Landman¹  Vadym A. Makhlaj¹  Nikolay N. Aksenov¹  Igor E. Garkusha¹  Alexander A. Chuvilo¹ 

关键词: ITER;    ELMs simulation experiments;    QSPA;    plasma-surface interaction;    tungsten dust.;   

DOI  :  

来源: Czech Technical University in Prague, Faculty of M

【 摘 要 】

Dust generation under powerful plasma stream impacts has been studied in ITER ELM simulation experiments with QSPA Kh-50 plasma accelerator. Repetitive plasma exposures of tungsten have been performed by 0.25 ms plasma pulses and the heat load varied in the range (0.1÷1.1) MJm-2. Main characteristics of dust particles such as a number of ejected particles, their velocity, angular distribution and start time from the surface are investigated. Dust particles have not been observed under heat load below the cracking threshold. Quantity of dust particles rises with increasing heat load. Average velocities of dust particles are found to be strongly dependent on their start time from the surface after beginning of plasma-surface interaction. Maximal velocity achieved a few tens of meters per second.

【 授权许可】

Unknown