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Measurement of impurity lines with two-crystal x-ray spectrometers on EAST

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Plasma Science and Technology 2018年第12期20卷 1-8页

作者： Xinshuai YANG Ruiji HU Jun CHEN Fudi WANG Jia FU Yingying LI Hongming ZHANG yongcai shen Xianghui YIN Bo LYU Institnte of Plasma Physics Chinese Academy of SciencesHefei 230031People＇s Republic of China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026People＇s Republic of China School of Physics and Electrical Engineering Anqing Normal UniversityAnqing 246011People＇s Republic of China School of Electrical Engineering University of South ChinaHengyang 421001People＇s Republic of China

To simultaneously measure the He-like and H-like argon spectra, a two-crystal assembly has been deployed to replace the previous single crystal on the tangential x-ray crystal *** selecting appropriate crystals with similar Bragg angles, plasma temperature in the range of 0.5 keV≤Te≤10 keV and rotation can be diagnosed based on the He-like and H-like argon spectra. However, due to the added complexity in the two-crystal assembly in which the spectra might be diffracted by two crystals, some additional impurity lines were identified. For example,tungsten（W） lines in different ionization states were diffracted by the He-like and H-like *** molybdenum（Mo） lines in the wavelength range of He-like and H-like argon spectra lines were also summarized. The existence of these additional lines caused the fitted temperature to be different from the true values. This paper presents the identified lines through a comparison with available database, which should be included in the fitting procedure.

关键词： plasma diagnostics x-ray two-crystal spectrometer Doppler broadening dielectronicsatellite

Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak

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Chinese Physics B 2020年第6期29卷 333-338页

作者： yongcai shen Hongming Zhang Bo Lyu Yingying Li Jia Fu Fudi Wang Qing Zang Baonian Wan Pan Pan Minyou Ye 不详 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China School of Mathematics and Physics Anqing Normal UniversityAnqing 246011China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China the EAST team

We report the measurement of total molybdenum ion density for L-mode and H-mode plasmas on EAST using spectral lines observation and calculation based on an impurity transport code.A flat-filed extreme ultraviolet spectrometer with some spatial resolution is used to obtain the radial profiles of molybdenum spectral line *** absolute calibration for the extreme ultraviolet spectrometer is finished by comparing the calculated bremsstrahlung intensity with the readings of CCD *** ion transport study is performed using the radial ion density profiles and one-dimensional impurity transport code *** total molybdenum density profiles are determined from the transport *** molybdenum density during L-mode and H-mode phases are obtained,which are about 3 and 4 orders of magnitude smaller than the electron density,*** inward pinch is found during the H-mode phase that leads to the peaked profile of molybdenum density.

关键词： EAST EUV spectroscopy molybdenum density L-mode and H-mode

Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak

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Plasma Science and Technology 2020年第8期22卷 8-13页

作者： Hongming ZHANG Bo LYU Liang HE yongcai shen Jun CHEN Jia FU Bin BIN Xunyu WANG Fudi WANG Yingying LI Ling ZHANG Bing LIU Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China School of Nuclear Science and Technology University of South ChinaHengyang 421001People's Republic of China School of Physics and Electrical Engineering Anqing Normal UniversityAnqing 246011People's Republic of China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwestern Jiaotong UniversityChengdu 610031People's Republic of China

The dominant wavelength range of edge impurity emissions moves from the visible range to the vacuum ultraviolet(VUV)range,as heating power increasing in the Experimental Advanced Superconducting Tokamak(EAST).The measurement provided by the existing visible spectroscopies in EAST is not sufficient for impurity transport studies for high-parameters ***,in this study,a VUV spectroscopy is newly developed to measure edge impurity emissions in *** Seya-Namioka VUV spectrometer(McPherson 234/302)is used in the system,equipped with a concave-corrected holographic grating with groove density of 600 grooves *** line emissions can be observed in the wavelength range ofλ=50-700 nm,covering VUV,near ultraviolet and visible *** observed vertical range is Z=-350-350 *** minimum sampling time can be set to 5 ms under full vertical binning(FVB)*** spectroscopy has been used to measure the edge impurity emission for the 2019 EAST experimental *** spectra are identified for several impurity species,i.e.,lithium(Li),carbon(C),oxygen(O),and iron(Fe).Several candidates for tungsten(W)lines are also measured but their clear identification is very difficult due to a strong overlap with Fe *** evolutions of impurity carbon emissions of CⅡat 134.5 nm and CⅢat 97.7 nm are analyzed to prove the system capability of time-resolved *** measurements of the VUV spectroscopy are very helpful for edge impurity transport study in the high-parameters plasma in EAST.

关键词： EAST tokamak impurity tungsten vacuum ultraviolet spectroscopy edge impurity emission plasma diagnostics

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基于FPGA的极紫外光谱图像处理系统

核技术 2024年第3期47卷 55-64页

作者：孙波刘冲张洪明吕波尹相辉林子超沈永才计华健符佳王福地胡奎范玉毛立宇曾超南华大学电气工程学院衡阳421001 中国科学院合肥物质科学研究院等离子体物理研究所合肥230031 中国科学技术大学研究生院科学岛分院合肥230031 合肥师范学院物理与材料工程学院合肥230601 安徽大学物质科学与信息技术研究院合肥230601

东方超环(Experimental Advanced Superconducting Tokamak,EAST)全超导托卡马克装置上极紫外(Extreme Ultraviolet,EUV)光谱诊断系统采用电荷耦合器件(Charge Coupling Device,CCD)探测器集光谱图像数据,硬X射线对CCD产生的干扰造成光谱数据中存在大量的单像素噪声,这为准确分析聚变等离子体杂质辐射带来极大的困难。针对这一问题,设计了一套基于可编程门阵列(Field Programmable Gate Array,FPGA)的EUV光谱图像处理系统,来快速去除硬X射线产生的噪声干扰。该系统基于限幅滤波算法,并引入标准差和离均差替代固定限幅阈值和样本偏差;通过融合限幅滤波算法和数据判别法,外加设置算法工作区间来分阶段对光谱图像数据进行相应处理。同时设计了仿真测试模块,使用EUV光谱图像转化的视频数据模仿采集流程进行系统的功能测试。最后,为了检验该系统对有效光谱数据的保护能力,将图像数据转换成更加直观的谱线图进行对比分析。实验测试结果表明:该系统能够有效去除光谱图像中的噪声点,并较好地保持了光谱数据的完整性,从而提升了光谱数据的可观测性。

关键词：极紫外光图像处理可编程门阵列图像降噪

类石墨烯硫族化合物纳米材料及其在能源领域中的应用

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材料导报 2016年第11期30卷 136-142页

作者：沈永才徐菲吴义恒安庆师范学院物理与电气工程学院安庆246133

2004年以来,以石墨烯为代表的新型二维纳米材料引起了全球范围内的研究热潮,在光电子、生物、能源等领域展现出了巨大的应用潜力。过渡金属硫族化合物因平面内结合力较强、平面外结合力较弱以致可以将其剥离成单个细胞厚度的二维层状纳... 详细信息

2004年以来,以石墨烯为代表的新型二维纳米材料引起了全球范围内的研究热潮,在光电子、生物、能源等领域展现出了巨大的应用潜力。过渡金属硫族化合物因平面内结合力较强、平面外结合力较弱以致可以将其剥离成单个细胞厚度的二维层状纳米材料,且该材料具备类石墨烯物理化学性质而被誉为"无机石墨烯"。关于二维过渡金属硫族化合物纳米材料的研究已有多年,众多研究表明,因其具有独特的结构和特性,在光电器件、催化及能源存储领域有着广阔的应用前景。基于该领域研究的最新进展,综述了二维过渡金属硫族化合物纳米材料在能源领域中的应用,并对目前相关研究领域的发展趋势进行了总结和展望。

关键词：过渡金属硫族化合物二维层状纳米材料制备方法能源存储

Space-resolved vacuum-ultraviolet spectroscopy for measuring impurity emission from divertor region of EAST tokamak

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Plasma Science and Technology 2022年第6期24卷 14-22页

作者： Liang HE yongcai shen Hongming ZHANG Bo LYU Cheonho BAE Huajian JI Chaoyang LI Jia FU Xuewei DU Fudi WANG Qiuping WANG Xianghui YIN Shunkuan WAN Bin BIN Yichao LI Shuyu DAI Institute of Plasma Physics HFIPSChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China School of Physics and Materials Engineering Hefei Normal UniversityHefei 230601People's Republic of China Institute of Energy Comprehensive National Science CenterHefei 230026People's Republic of China School of Electrical Engineering University of South of ChinaHengyang 420001People's Republic of China Anhui Spectreation Instrument Co.Ltd Hefei 230088People's Republic of China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029People's Republic of China School of Physics Dalian University of TechnologyDalian 116024People's Republic of China

The measurement of impurity distribution in the divertor region of tokamaks is key to studying edge impurity ***,a space-resolved vacuum-ultraviolet(VUV)spectrometer is designed to measure impurity emission in the divertor region on *** good spectral resolution,an eagle-type VUV spectrometer with 1 m long focal length with spherical holograph grating is used in the *** light collection,a collimating mirror is installed between the EAST plasma and the VUV spectrometer to extend the observing range to cover the upper divertor *** types of detectors,i.e.a back-illuminated charge-coupled device detector and a photomultiplier-tube detector,are adopted for the spectral measurement and high-frequency intensity measurement for feedback control,*** angle between the entrance and exit optical axis is fixed at 15°.The detector can be moved along the exit axis to maintain a good focusing position when the wavelength is scanned by rotating the *** profile of impurity emissions is projected through the space-resolved slit,which is set *** spectrometer is equipped with two gratings with 2400 grooves/mm and2160 grooves/mm,*** overall aberration of the system is reduced by accurate detector *** a result,the total spectral broadening can be reduced to about 0.013 *** simulated performance of the system is found to satisfy the requirement of measurement of impurity emissions from the divertor area of the EAST tokamak.

关键词： impurity measurement vacuum-ultraviolet spectrometer EAST divertor

Observation and characterization of the effect of electron cyclotron waves on toroidal rotation in EAST L-mode discharges

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Plasma Science and Technology 2017年第10期19卷 14-19页

作者： Jun CHEN Ruiji HU Bo LYU Fudi WANG Xiaojie WANG Handong XU Yingying LI Jia FU Xianghui YIN Dajun WU Fukun LIU Qing ZANG Haiqing LIU Yuejiang SHI Shifeng MAO Yi YU Baonian WAN Minyou YE yongcai shen EAST team School of Nuclear Science and Technology University of Science and Technology of China Hefei 230026 People＇s Republic of China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People＇s Republic of China Department of Nuclear Engineering Seoul National University Seoul 151-742 Korea School of Physics and Electrical Engineering of Anqing Normal University Anqing 246011 People＇s Republic of China

The change in the toroidal rotation of plasma caused by electron cyclotron wave（ECW） injection has been observed in EAST. It is found that the response of the rotation is similar for all possible ECW toroidal injection angles. The core toroidal rotation velocity increases in the co-current direction along with a rise in the plasma temperature and stored energy. The profile of the electron temperature, ion temperature and toroidal rotation velocity gradually become *** change in toroidal rotation in the core increases with the ECW injection power. Different behavior is observed when the ECWs are injected into low hybrid current drive（LHCD） target plasmas, where the electron temperature and rotation profile become peaked, while the ion temperature profile flattens after ECW injection, suggesting different transport characteristics in energy and momentum.

关键词： ECW plasma toroidal rotation LHCD x-ray crystal spectrometer

高温等离子体中高Z金属杂质的观测及其行为研究

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安庆师范大学学报（自然科学版） 2022年第4期28卷 17-23页

作者：沈永才何梁合肥师范学院物理与材料工程学院安徽合肥230601 中国科学院等离子体物理研究所安徽合肥230031

国际热核聚变实验堆及中国聚变工程实验堆采用高Z金属杂质钨作为偏滤器材料,但以钨为主的金属材料由于溅射作用会进入等离子体,从而极易在等离子体芯部聚集。芯部过高的金属杂质含量会对等离子体放电带来极大负面影响,对高温等离子体中... 详细信息

国际热核聚变实验堆及中国聚变工程实验堆采用高Z金属杂质钨作为偏滤器材料,但以钨为主的金属材料由于溅射作用会进入等离子体,从而极易在等离子体芯部聚集。芯部过高的金属杂质含量会对等离子体放电带来极大负面影响,对高温等离子体中的金属杂质进行测量及其行为研究,并探索金属杂质含量控制对于实现高温等离子体的稳态运行至关重要。本文以东方超环托卡马克为例,介绍了高温等离子体芯部金属杂质的测量方法,研究了金属杂质在不同放电条件下的行为。采用基于平场光栅的软X射线和极紫外光谱诊断观测不同条件下的杂质辐射光谱,对金属杂质行为进行研究,并采用多种实验手段在一定程度上抑制了芯部金属杂质聚芯行为。

关键词：等离子体杂质测量光谱诊断杂质聚芯

高校转专业班级问题现状分析——以安庆师范大学经济与管理学院为例

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黑河学院学报 2018年第11期9卷 96-97,110页

作者：徐菲沈永才安庆师范大学经济与管理学院安徽安庆246133 安庆师范大学物理与电气工程学院安徽安庆246133

高校转专业逐渐成为高教发展改革的一种趋势,以安庆师范大学经济与管理学院为例,根据目前转专业班级成员构成复杂、宿舍分布散乱、集体意识欠缺、自我认同度低等问题现状,从学校、转入学院、辅导员角度在宿舍管理、专业教育、思想引导... 详细信息

高校转专业逐渐成为高教发展改革的一种趋势,以安庆师范大学经济与管理学院为例,根据目前转专业班级成员构成复杂、宿舍分布散乱、集体意识欠缺、自我认同度低等问题现状,从学校、转入学院、辅导员角度在宿舍管理、专业教育、思想引导等方面,采取有效措施,建立新的秩序。

关键词：转专业班级问题现状思考和建议