Formation mechanism of the fiberform nanostructure and physical property changes due to helium plasma irradiation

氦等离子体辐照引起的纤维状纳米结构的形成机制和物理性能变化

• 批准号: 21760690
• 负责人: KAJITA Shin
• 金额: $ 2.83万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760690/
• 关键词: プラズマ; ヘリウム照射; ナノ構造; タングステン; 熱・光物性変化; ヘリウム損傷; 金属; 物性

Helium plasma irradiation has been conducted in the divertor simulator NAGDIS. Typical plasmas used for the irradiation are the electron density of 10^<18>m^-3> and the temperature of 5 eV. For the nanostructure on W, parametric dependence of the formation of the nanostructure has been extensively investigated and found that the fuzz structure is formed when the surface temperature was in the range of 1000-2000 K and the incident ion energy s higher than ~20-30 eV.Furthermore, it is shown that the roughed metals by helium irradiation significantly increase the optical absorptivity, and can be a good medium for an optical absorber medium. The optical reflectivity decreased two orders of magnitude, making it the darkest man-made tungsten, which could be used in high temperature circumstances. The results indicate that the helium irradiated metals can be a good medium for light absorber.

氦等离子体辐照已在转移模拟器Nagdis中进行。用于照射的典型等离子体是电子密度为10^<18> m^-3>，温度为5 eV。对于W的纳米结构，已经对纳米结构形成的参数依赖性进行了广泛的研究，并发现当表面温度在1000-2000 K范围内时，形成了模糊结构，并且入射离子能量高于20--20- 30 ev.furthermore，这表明氦辐射的粗糙金属显着提高了光吸收性，并且可以成为光吸收剂培养基的良好培养基。光学反射率降低了两个数量级，使其成为最黑的人造钨，可以在高温下使用。结果表明，氦辐照金属可以是吸收光的好培养基。

项目成果

金属ミラー材料へのヘリウムプラズマ照射による光学反射率劣化

氦等离子体照射金属镜材料导致光学反射率劣化

• 发表时间: 2009
• 作者: 佐伯翼;大野哲靖;梶田信;時谷政行
• 通讯作者: 時谷政行

Tungsten blow-off in response to the ignition of arcing : revival of arcing issue in future fusion devices

响应电弧点燃而吹灭钨：未来聚变装置中电弧问题的重现

• 发表时间: 2010
• 作者: S.Kajita;S.Takamura;N.Ohno;Shin Kajita
• 通讯作者: Shin Kajita

Formation process of tungsten nanostructure by the exposure to helium plasma under fusion relevant plasma conditions

• DOI: 10.1088/0029-5515/49/9/095005
• 发表时间: 2009-09-01
• 期刊: NUCLEAR FUSION
• 影响因子: 3.3
• 作者: Kajita, Shin;Sakaguchi, Wataru;Saeki, Tsubasa
• 通讯作者: Saeki, Tsubasa

Nanostructured Black Metal: Novel Fabrication Method by Use of Self-Growing Helium Bubbles

• DOI: 10.1143/apex.3.085204
• 发表时间: 2010-08-01
• 期刊: APPLIED PHYSICS EXPRESS
• 影响因子: 2.3
• 作者: Kajita, Shin;Saeki, Tsubasa;Iwamae, Atsushi
• 通讯作者: Iwamae, Atsushi

Enhancement of ignition of arcing due to helium bubbles

氦气泡增强电弧的点燃

• 发表时间: 2010
• 作者: Shin Kajita;Tsubasa Saeki;Yuki Hirahata;Noriyasu Ohno;Shin Kajita;Shin Kajita;Shin Kajita;Shin Kajita;Shin Kajita
• 通讯作者: Shin Kajita