Synergistic effects of high heat loading and helium irradiation of tungsten
Synergistic effects of high heat loading and helium irradiation of tungsten
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DOI：
10.1016/j.jnucmat.2004.04.178
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发表时间：
2004-08
影响因子：
3.1
通讯作者：
K. Tokunaga;S. Tamura;N. Yoshida;K. Ezato;M. Taniguchi;Katsumi Sato;S. Suzuki;M. Akiba
中科院分区：
文献类型：
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作者：
K. Tokunaga;S. Tamura;N. Yoshida;K. Ezato;M. Taniguchi;Katsumi Sato;S. Suzuki;M. Akiba
利用氦束对粉末冶金钨进行了高热流密度实验。He的能量是19kev。束心的流通量和热流通量分别为2.0×1021He/m2s和6.0 MW/m2。射束持续时间3.0-3.9秒，射束间隔30秒。样品通过重复辐照脉冲辐照至1022-1024He /m2的辐照量。除氦束辐照外，还对样品进行了氢束和电子束的高热流密度实验。辐照后，研究了辐照后的表面改性。氦、氢光束的表面改性与电子束加热的结果完全不同。特别是，氦束加热在2400°C以上的峰值温度下会引起明显的表面修饰，如精细粗糙的表面。
High heat flux experiments using a helium beam have been carried out on powder metallurgy tungsten. The energy of He is 19 keV. He beam flux and heat flux at the beam center is 2.0×1021He/m2s and 6.0 MW/m2, respectively. Beam duration is 3.0–3.9 s and interval of beam shot start is 30 s. The samples are irradiated up to a fluence of 1022–1024He/m2by the repeated irradiation pulses. In addition to the He beam irradiation, high heat flux experiments using hydrogen and electron beams have also been carried out on the samples. After the irradiation, surface modification by the irradiation has been investigated. Surface modification by helium and hydrogen beams is completely different from results of electron beam heating. In particular, helium beam heating causes remarkably surface modification such as a fine-scale rough surface at a peak temperature above 2400 °C.