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Coated boron layers by boronization and a real-time boron coating using an impurity powder dropper in the LHD

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Plasma Science and Technology 2024年第8期26卷 25-31页

作者： Naoko ASHIKAWA Robert LUNSFORD Federico NESPOLI Erik GILSON Yaowei YU Jiansheng HU shinichiro kado National Institute for Fusion Science Toki 509-5292Japan Princeton Plasma Physics Laboratory Princeton NJ 08540United States of America Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China Institute of Advanced Energy Kyoto UniversityKyoto 611-0011Japan

In the Large Helical Device(LHD),diborane(B2H6)is used as a standard boron source for boronization,which is assisted by helium glow *** 2019,a new Impurity Powder Dropper(IPD)system was installed and is under evaluation as a real-time wall conditioning *** the LHD,which is a large-sized heliotron device,an additional helium(He)glow discharge cleaning(GDC)after boronization was operated for a reduction in hydrogen recycling from the coated boron *** operational time of 3 h was determined by spectroscopic data during glow discharges.A flat hydrogen profile is obtained on the top surface of the coated boron on the specimen exposed to *** results suggest a reduction in hydrogen at the top surface by *** oxygen in coated boron was obtained by boronization,and the coated boron,which has boron-oxide,on the first wall by B-IPD was also *** the difference in coating areas between B2H6 boronization and B-IPD operation,it would be most effective to use the IPD and B2H6 boronization coating together for optimized wall conditioning.

关键词： boron layer oxygen impurity hydrogen recycling impurity powder dropper LHD EAST

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EAST等离子体边界可见光成像系统研究

核聚变与等离子体物理 2024年第2期44卷 222-228页

作者：陈明沈飊 shinichiro kado 陈大龙张恒郭笔豪黄耀蔡福瑞肖炳甲中国科学院合肥物质科学研究院合肥230031 中国科学技术大学合肥230026 京都大学日本京都市左京区227-8568 重庆邮电大学重庆400065

设计了一套针对Hα波段的高精度折叠式光学系统用来观察放电过程中等离子体边界特征,该系统在全视场中实现了4mm的分辨率。基于图像局部特征和相机模型,发展了光学等离子体边界重建算法,在EAST上针对高场侧中平面处的等离子体控制点进... 详细信息

设计了一套针对Hα波段的高精度折叠式光学系统用来观察放电过程中等离子体边界特征,该系统在全视场中实现了4mm的分辨率。基于图像局部特征和相机模型,发展了光学等离子体边界重建算法,在EAST上针对高场侧中平面处的等离子体控制点进行了算法验证,光学重建的控制点随时间的演化与磁平衡重建的结果吻合良好。

关键词： EAST装置等离子体边界光学成像

Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge

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Plasma Science and Technology 2020年第11期22卷 36-41页

作者： Trung Nguyen TRAN Bounyang OANTHAVINSAK shinichiro kado Hiroto MATSUURA Department of Quantum and Radiation Engineering Graduate School of EngineeringOsaka Prefecture UniversitySakaiOsaka 599-8570Japan Institute of Advanced Energy Kyoto UniversityUjiKyoto 611-0011Japan

In this study,the effects of the fluid cooling and electric field line deformation were investigated in a dielectric barrier discharge(DBD)plasma *** DBD plasma jet is improved by covering the ground electrode and a power electrode with insulating *** obtained positive results as insulating oil prevents arc formation,while it improved the supplied power and plasma jet length,and increased radical *** production of this nonthermal plasma jet is studied with polyvinyl alcohol-potassium iodide liquid.

关键词： atmospheric pressure plasma jet APPJ Lissajous figure dielectric barrier discharge plasma plume

Diagnostics of Rovibrational Distribution of H_2 in Low Temperature Plasmas by Fulcher-α band Spectroscopy - on the Reaction Rates and Transition Probabilities

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Plasma Science and Technology 2005年第2期7卷 2773-2776页

作者：肖炳甲 shinichiro kado Shin Kajita Daisuge Yamasaki Satoru Tanaka Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031China High temperature plasma research center the university of Tokyo Yayoi 2-11-16Bunkyo-kuTokyoJapan 113-0030 Graduate school of engineering department of quantum engineering and systems sciences the university of Tokyo

A novel fitting procedure is proposed for a better determination of H2 rovibrational distribution from the Fulcher-α band spectroscopy. We have recalculated the transition probabilities and the results show that they deviate from Franck-Condon approximation especially for the non-diagonal transitions. We also calculated the complete sets of vibrationally resolved cross sections for electron impact d3Ⅱu-X3Σg transition based on the semi-classical Gryzinski theory. An example of experimental study confirms that current approach provides a tool for a better diagnostics of H2 rovibrational distribution in electronic ground state.

关键词： Fulcher-a band rovibronic excitation hydrogen molecule