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Evaluation of electron cyclotron current drive performance for CFETR

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Plasma Science and Technology 2019年第6期21卷 63-71页

作者： Wei WEI Xiaojie WANG miaohui li Bojiang DING Hefei University of Technology Hefei 230601 People's Republic of China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China

A number of simulations of electron cyclotron current drive (ECCD) have been carried out for the China Fusion Engineering Test Reactor (CFETR) using the C3PO/LUKE code to investigate the performance and optimize schemes of power injection for the design of the *** operation ranges of the toroidal field,cutoff density,and resonance layer location are given at different source frequencies in CFETR phases Ⅰ and Ⅱ.A comparison of ECCD performance between the horizontal and top port launch is *** efficiency (γEC) estimated for CFETR phase Ⅰ is γEC =0.21 for top port launch and γEC =0.20 for horizontal port *** ECCD efficiency and second-harmonic absorption is calculated at different wave frequencies (from 170 to 230 GHz) in CFETR phase Ⅱ.It is found that the highest driven efficiency is obtained at 210 GHz with the toroidal field of 6.5 T,and the second-harmonic absorption increases rapidly with the increase of frequency.

关键词： CFETR electron cyclotron current drive current drive efficiency

习近平对马克思主义经典作家历史主体理论的创新与启示

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西安电子科技大学学报（社会科学版） 2024年第1期34卷 137-143页

作者：李妙辉任君王婷婷王冠茹西安交通大学前沿科学技术研究院陕西西安710100

立足新时代中国特色社会主义的国情与马克思主义中国化的理论成果,习近平对马克思主义经典作家的历史主体理论进行了时代性创新。在历史主体建构方面,习近平揭示了“过去”对于历史主体的建构意义,提出了“总结过去、立足当下、开创未... 详细信息

立足新时代中国特色社会主义的国情与马克思主义中国化的理论成果,习近平对马克思主义经典作家的历史主体理论进行了时代性创新。在历史主体建构方面,习近平揭示了“过去”对于历史主体的建构意义,提出了“总结过去、立足当下、开创未来”这一更具贯通性、更为完整的建构逻辑。在历史主体的实践机理方面,习近平指出应在多维视域下探索关于个别国家特定时期的具体演进规律,并据此研判具体趋势、发挥历史主动,使历史主体实践理论更加系统和深化。在历史主体作用方面,习近平深入论证了党的领导在人民发挥历史主体作用中的地位,将其从关键条件上升为根本保障条件。这些创新在当前理论和实践领域的重要启示有:着力深化对“三大规律”的探索与运用;科学构建中华民族伟大复兴的强大历史合力;坚定历史进步信念与培育历史主动精神;依托“伟大工程”加强优化党的历史引领。

关键词：唯物史观习近平新时代中国特色社会主义思想历史主体

Impact of T_(i)/T_(e )ratio on ion transport based on EAST H-mode plasmas

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Plasma Science and Technology 2024年第4期26卷 68-78页

作者：刘建文臧庆梁云峰陈佳乐邬潇河 Alexander KNIEPS 扈嘉辉金仡飞张斌储宇奇刘海庆吕波段艳敏李妙辉陈颖杰龚先祖 the EAST Team Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich 52425Germany

At the EAST tokamak, the ion temperature(T_(i)) is observed to be clamped around 1.25 keV in electron cyclotron resonance(ECR)-heated plasmas, even at core electron temperatures up to 10 keV(depending on the ECR heating power and the plasma density). This clamping results from the lack of direct ion heating and high levels of turbulence-driven transport. Turbulent transport analysis shows that trapped electron mode and electron temperature gradient-driven modes are the most unstable modes in the core of ECR-heated H-mode plasmas. Nevertheless, recently it was found that the T_(i)/T_(e)ratio can increase further with the fraction of the neutral beam injection(NBI) power, which leads to a higher core ion temperature(Ti0). In NBI heating-dominant H-mode plasmas, the ion temperature gradient-driven modes become the most unstable ***, a strong and broad internal transport barrier(ITB) can form at the plasma core in high-power NBI-heated H-mode plasmas when the T_(i)/T_(e)ratio approaches ~1, which results in steep core Teand Tiprofiles, as well as a peaked neprofile. Power balance analysis shows a weaker Teprofile stiffness after the formation of ITBs in the core plasma region, where Ticlamping is broken,and the core Tican increase further above 2 keV, which is 80% higher than the value of Ticlamping in ECR-heated plasmas. This finding proposes a possible solution to the problem of Ticlamping on EAST and demonstrates an advanced operational regime with the formation of a strong and broad ITB for future fusion plasmas dominated by electron heating.

关键词： ion temperature clamping transport neutral beam injection stiffness internal transport barrier

Experimental Investigation of Lower Hybrid Wave Coupling in HT-7

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Plasma Science and Technology 2013年第10期15卷 989-995页

作者： KONG Erhua DING Bojiang ZHANG Ting QIN Yongliang SHAN Jiafang liU Fukun li miaohui ZHANG Lei WANG Mao liU liang XU Handong JIA Hua WU Zege FENG Jianqiang ZHAO lianmin YANG Yong Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China School of Physics Hefei University of Technology Hefei 230009 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China

Experiments on lower hybrid wave （LHW） coupling were investigated in the HT- 7 tokamak. Good coupling of LHW plasma has been demonstrated at different conditions in the HT-7 tokamak. Relevant results have proved that LHW-plasma coupling is affected by the phase difference between adjacent waveguides. Furthermore, the edge density around the grill and relevant coupling can be adjusted by changing the plasma line average density or the gap value between the LH grill and the last closed flux surfaces （LCFS）. It is found that the coupling of LHWs becomes poor when the edge density around the LH grill is large enough in the HT-7 tokamak, and that coupling remains good with a proper edge density. With increasing LHW power, it is also found that the reflection coefficients （RCs） increase due to non-linear effects under conditions of low edge recycling, but can decrease under high edge recycling. The edge density depends mainly on the competition between the ponderomotive force （PMF） and the edge recycling intensity in the HT-7 tokamak.

关键词： LH wave coupling plasma edge density phase difference ponderomotiveforce

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群体动力对矿工不安全行为意向的影响研究

中国安全科学学报 2021年第7期31卷 48-55页

作者：李妙慧栗继祖太原理工大学经济管理学院山西太原030024

为发挥群体动力在煤矿企业班组中的积极作用,预防矿工不安全行为意向(UBI)的产生,在回顾与分析文献的基础上,建立矿工群体动力、心理安全感(PS)、人际关系与UBI之间的关系假设模型。以296名煤矿企业一线班组人员为研究对象进行数据收集... 详细信息

为发挥群体动力在煤矿企业班组中的积极作用,预防矿工不安全行为意向(UBI)的产生,在回顾与分析文献的基础上,建立矿工群体动力、心理安全感(PS)、人际关系与UBI之间的关系假设模型。以296名煤矿企业一线班组人员为研究对象进行数据收集,分别基于结构方程模型(SEM)与层级回归法检验PS的中介效应和人际关系的调节效应。结果表明:群体凝聚力、群体感染力、群体驱动力与PS显著正相关,群体压力、群体耗散力与PS显著负相关;PS与矿工UBI显著负相关;PS在群体凝聚力、群体压力、群体耗散力与矿工UBI间起中介作用;人际关系在群体凝聚力、群体驱动力、群体压力与PS间起调节作用。

关键词：群体动力不安全行为意向(UBI) 心理安全感(PS) 人际关系结构方程模型(SEM)

Impact of core electron temperature on current profile broadening with radiofrequency wave heating and current drive in EAST

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Plasma Science and Technology 2022年第10期24卷 23-29页

作者： Jiayuan ZHANG Jinping QIAN Xianzu GONG Bin ZHANG Muquan WU miaohui li Jiale CHEN Qing ZANG Shiyao liN Yan CHAO Hailin ZHAO Ruirong liANG Tianqi JIA Yunchan HU Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China Advanced Energy Research Center Shenzhen UniversityShenzhen 518060People's Republic of China

In recent EAST experiments,current profile broadening characterized by reduced internal inductance has been achieved by utilizing radio-frequency current drives(RFCD).In contrast to previous density scan experiments,which showed an outward shift of the current density profile of lower hybrid current drive(LHCD)in higher plasma density,the core electron temperature(T_(e)(0))is found to affect the LHCD current profile as *** to equilibrium reconstruction,a significant increase in on-axis safety factor(q0)from 2.05 to 3.41 is observed by careful arrangement of *** using ray-tracing code GENRAY and Fokker–Planck code CQL3D have been performed to thoroughly analyze the LHCD current profile,revealing the sensitivity of the LHCD current profile to T_(e)(0).The LHCD current density tends to accumulate in the plasma core with higher current drive efficiency benefiting from higher T_(e)(0).With a lower T_(e)(0),the LHCD current profile broadens due to off-axis deposition of power *** sensitivity of the power deposition and current profile of LHCD to T_(e)(0)provides a promising way to effectively optimize current profile via control of the core electron temperature.

关键词： current profile broadening equilibrium reconstruction core electron temperature lower hybrid wave

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新生代矿工工作满意度对安全绩效的影响

煤矿安全 2022年第4期53卷 248-252页

作者：李妙慧栗继祖太原理工大学经济管理学院山西太原030024

为有效发挥新生代矿工群体在煤矿企业安全管理中的积极作用,基于行为动机理论与社会交换理论,构建新生代矿工工作满意度、主观幸福感、工作投入和安全绩效的结构方程模型;分别运用层次回归法和Bootstrap法,对256份新生代矿工样本数据进... 详细信息

为有效发挥新生代矿工群体在煤矿企业安全管理中的积极作用,基于行为动机理论与社会交换理论,构建新生代矿工工作满意度、主观幸福感、工作投入和安全绩效的结构方程模型;分别运用层次回归法和Bootstrap法,对256份新生代矿工样本数据进行直接效应和中介效应检验。结果表明:新生代矿工工作满意度、主观幸福感、工作投入和安全绩效两两显著正相关;工作满意度可通过主观幸福感、工作投入的独立中介作用以及二者的链式中介作用两条路径间接影响安全绩效。

关键词：新生代矿工工作满意度安全绩效主观幸福感工作投入

EAST电子回旋波与低杂波双波协同的数值模拟

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原子能科学技术 2018年第1期52卷 1-7页

作者：韦维李妙辉张霆孙晓霞合肥工业大学安徽合肥230009 中国科学院等离子体物理研究所安徽合肥230031

为在EAST装置中优化电子回旋波与低杂波双波协同的电流驱动效率,从而获得更大的协同驱动电流以维持长脉冲运行,本文以双波协同驱动电流的物理机制为基础,运用模拟程序C3PO/LUKE对EAST参数下电子回旋电流驱动与低杂波电流驱动的协同效果... 详细信息

为在EAST装置中优化电子回旋波与低杂波双波协同的电流驱动效率,从而获得更大的协同驱动电流以维持长脉冲运行,本文以双波协同驱动电流的物理机制为基础,运用模拟程序C3PO/LUKE对EAST参数下电子回旋电流驱动与低杂波电流驱动的协同效果进行了数值模拟计算,给出了协同电流和协同因子。计算结果表明:当两波驱动电流密度峰值的位置一致时协同效果最佳;而电子密度和电子温度的增加可能导致两波重叠区域的变化进而影响协同效果。

关键词： EAST 双波协同数值模拟

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： Electrolyte additive li dendrites li metal batteries liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode