Simulation experiment of thermal transient events in ITER by use of magneti zed coaxial plasma gun

Y. Kikuchi, R. Nakanishi, M. Nakatsuka, N. Fukumoto, M. Nagata
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Abstract

A compact-sized MCPG with a single discharge stage is developed so as to simulate transient heat loads such as type I ELMs in ITER. The MCPG produces H2 plasma with the electron density of 1-4×1021 m−3, the ion energy of 15 eV and the pulse width of 0.5 ms. It is found that the absorbed energy density measured by a calorimeter reaches 0.9 MJ/m2 which is comparable to transient heat load of type I ELMs expected in ITER. Erosion of tungsten due to the plasma irradiation produced by the MCPG was confirmed only at the edge parts of the specimen.
利用磁化同轴等离子体枪进行ITER热瞬态事件的模拟实验
为了模拟ITER中I型elm等瞬态热负荷,研制了一种单放电级紧凑型MCPG。生成的H2等离子体的电子密度为1-4×1021 m−3,离子能量为15 eV,脉冲宽度为0.5 ms。用量热计测得的吸收能量密度达到0.9 MJ/m2,与ITER中预期的I型elm的瞬态热负荷相当。由于等离子体辐照产生的钨的腐蚀被证实仅在试样的边缘部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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