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Long radial coherence of electron temperature fluctuations in non-local transport in HL-2A plasmas

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Chinese Physics B 2024年第2期33卷 413-420页

作者：石中兵方凯锐李景春邹晓岚卢兆旸闻杰王占辉丁玄同陈伟杨曾辰蒋敏季小全佟瑞海李永高施陪万钟武律许敏 Southwestern Institute of Physics Chengdu 610041China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Nuclear and Radiation Safety College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China CEA IRFMSaint-Paul-lez-Durance 13108France

The dynamics of long-wavelength(kθ<1.4 cm^(-1)),broadband(20 kHz–200 kHz)electron temperature fluctuations(Te/Te)of plasmas in gas-puff experiments are observed for the first time in HL-2A *** a relatively low densi... 详细信息

The dynamics of long-wavelength(kθling evidence indicates that E×B shear serves as a substantial contributor to this extensive radial *** finding offers a direct explanatory link to the intriguing core-heating phenomenon witnessed within the realm of non-local transport.

关键词： nuclear fusion non-local transport tokamak gas-puffing

A precision control method for plasma electron density and Faraday rotation angle measurement on HL-2A

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Plasma Science and Technology 2017年第7期19卷 130-135页

作者： Wei ZHANG Tongyu WU Baogang DING yonggao li Yan ZHOU Zejie YIN State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 People＇s Republic of China Department of Modern Physics University of Science and Technology of China Hefei 230026 People＇s Republic of China Shanghai Radio Equipment Research Institute Shanghai 200090 People＇s Republic of China Southwestern Institute of Physics Chengdu 610041 People＇s Republic of China

The precision of plasma electron density and Faraday rotation angle measurement is a key indicator for far-infrared laser interferometer/polarimeter plasma diagnosis. To improve the precision, a new multi-channel high signal-to-noise ratio HCOOH interferometer/polarimeter has been developed on the HL-2A tokamak. It has a higher level requirement for phase demodulation precision. This paper introduces an improved real-time fast Fourier transform algorithm based on the field programmable gate array, which significantly improves the precision. We also apply a real-time error monitoring module （REMM） and a stable error inhibiting module （SEIM） for precision control to deal with the weak signal. We test the interferometer/polarimeter system with this improved precision control method in plasma discharge experiments and simulation experiments. The experimental results confirm that the plasma electron density precision is better than 1/3600 fringe and the Faraday rotation angle measurement precision is better than 1/900 fringe, while the temporal resolution is 80 ns. This performance can fully meet the requirements of HL-2A.

关键词： precision control far-infrared laser phase difference HL-2A

Surface-targeted functionalization of nickel-rich cathodes through synergistic slurry additive approach with multi-level impact using minimal quantity

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Nano Research 2024年第1期17卷 333-343页

作者： Jing Zhang Jiapei li Longhao Cao Wenhua Cheng Ziyin Guo Xiuxia Zuo Chao Wang Ya-Jun Cheng yonggao Xia Yudai Huang State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China School of Materials Science and Engineering Tongji UniversityShanghai 200240China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

liNi0.8Co0.1Mn0.1O_(2)(NCM811),a Ni-rich layered oxide,is a promising cathode material for high-energy density lithium-ion batteries(liBs).However,its structural instability,caused by adverse phase transitions and continuous oxygen release,as well as deteriorated interfacial stability due to excessive electrolyte oxidative decomposition,limits its widespread *** address these issues,a new concept is proposed that surface targeted precise functionalization(STPF)of the NCM811 cathode using a synergistic slurry additive(SSA)*** approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane(3-ADMS),followed by the precise deposition of ascorbic acid via an acid-base *** slurry additives induce the formation of an ultra-thin spinel surface layer and a stable cathode–electrolyte interface(CEI),which enhances the electrochemical kinetics and inhibits crack *** STPF strategy implemented by the SSA approach significantly improves the cyclic stability and rate performance of the NCM811 cathode in both half-cell and full-cell *** work establishes a promising strategy to enhance the structural stability and electrochemical performance of nickel-rich cathodes and provides a feasible route to promote practical applications of high-energy density lithium-ion battery technology.

关键词： nickel-rich cathode slurry additive lithium-ion battery cathode–electrolyte interface ascorbic acid phase transition

Observation of Multiple Broadband Alfvénic Chirping Modes in HL-2A NBI Plasmas

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Chinese Physics Letters 2021年第5期38卷 41-45页

作者： liming Yu Wei Chen Xiaoquan Ji Peiwan Shi Xuantong Ding Zhongbing Shi Ruirui Ma Yumei Hou yonggao li Jiaxian li Jianyong Cao Wulyu Zhong Min Xu Xuru Duan Southwestern Institute of Physics Chengdu 610041China Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

Multiple broadband Alfvenic chirping modes(CMs),with frequencies in the wide range of f-35-150 kHz and chirping down rapidly,are found in HL-2A neutral beam injection plasmas,and the CMs can even *** frequency chirping down process can be completed within-1 ms,and the frequency shift can reach 30-50 *** CMs propagate in ion diamagnetic drift directions *** toroidal mode number is confirmed to be n=1,2,3 and 4 for the f-35-65,55-90,70-120 and 100-150 kHz CMs,*** CMs are more like to be energetic-particle continuum modes(EPMs),since the modes almost locate on the Alfven continuum.

关键词： kHz Observation of Multiple Broadband Alfv nic Chirping Modes in HL-2A NBI Plasmas NBI

Investigation of the First Mirror on Tokamak

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2006年第1期 39-40页

作者： ZHOU Yan GAO Bingyi DENG Zhongchao JIAO Yiming liU Xiang YI Jiang li yonggao TIAN Chongli TANG Yiwu

The study progress of NNSF in 2006 has been presented in this paper. The aim and plan of this item have been described briefly. Three test mirror exposure experiments have been done in this year. The main components of the deposited materials on the first mirror are carbon and iron analyzed by AES. The first mirror is polluted easier during glow discharge and wall processing than omhic discharge.

关键词： First mirror Exposition Erosion Deposition

Multifactor roadmap for designing low-power-consumed micro thermoelectric thermostats in a closed-loop integrated 5G optical module

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Interdisciplinary Materials 2024年第2期3卷 326-337页

作者： Dongwang Yang Yubing Xing Jiang Wang Kai Hu Yani Xiao Kechen Tang Jianan Lyu Junhao li Yutian liu Peng Zhou Yuan Yu yonggao Yan Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina Nanostructure Research Center Wuhan University of TechnologyWuhanChina Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhanChina Institute of Physics(IA) RWTH Aachen UniversityAachenGermany

As the core components of fifth-generation(5G)communication technology,optical modules should be consistently miniaturized in size while improving their level of *** inevitably leads to a dramatic spike in power consumption and a consequent increase in heat flow density when operating in a confined *** ensure a successful start-up and operation of 5G optical modules,active cooling and precise temperature control via the Peltier effect in confined space is essential yet *** this work,p-type Bi_(0.5)Sb_(1.5)Te_(3)and n-type Bi_(2)Te_(2.7)Se_(0.3)bulk thermoelectric(TE)materials are used,and a micro thermoelectric thermostat(micro-TET)(device size,2×9.3×1.1mm^(3);leg size,0.4×0.4×0.5mm^(3);number of legs,44)is successfully integrated into a 5G optical module with Quad Small Form Pluggable 28 *** a result,the internal temperature of this kind of optical module is always maintained at 45.7°C and the optical power is up to 7.4 ***,a multifactor design roadmap is created based on a 3D numerical model using the ANSYS finite element method,taking into account the number of legs(N),leg width(W),leg length(L),filling atmosphere,electric contact resistance(Rec),thermal contact resistance(Rtc),ambient temperature(Ta),and the heat generated by the laser source(QL).It facilitates the integrated fabrication of micro-TET,and shows the way to enhance packaging and performance under different operating *** to the roadmap,the micro-TET(2×9.3×1mm^(3),W=0.3 mm,L=0.4 mm,N=68 legs)is fabricated and consumes only 0.89W in cooling mode(Q_(L)=0.7W,T_(a)=80℃)and 0.36Win heating mode(T_(a)=0℃)to maintain the laser temperature of 50℃.This research will hopefully be applied to other microprocessors for precise temperature control and integrated manufacturing.

关键词： 5G optical module finite element simulation micro thermoelectric thermostat Peltier effect

Recent advances in high-β_(N) experiments and magnetohydrodynamic instabilities with hybrid scenarios in the HL-2A Tokamak

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Fundamental Research 2022年第5期2卷 667-673页

作者： Wei Chen liming Yu Min Xu Xiaoquan Ji Zhongbing Shi Xiaoxue He Zhengji li yonggao li Tianbo Wang Min Jiang Shaobo Gong Jie Wen Peiwan Shi Zengchen Yang Kairui Fang Jia li Lai Wei Wulv Zhong Aiping Sun Jianyong Cao Xingyu Bai Jiquan li Xuantong Ding Jiaqi Dong Qingwei Yang Yi liu Longwen Yan Zhengxiong Wang Xuanru Duan Joint Laboratory for Fusion Product and Energetic Particle Southwestern Institute of PhysicsP.O.Box 432Chengdu 610041China Key Laboratory of Materials Modification by Beams of the Ministry of Education School of PhysicsDalian University of TechnologyDalian 116024China

Over the past several years,high-β_(N) experiments have been carried out on *** high-β_(N) is realized using double transport barriers(DTBs)with hybrid scenarios.A stationary high-β_(N) (>2)scenario was obtained by pure neutral-beam injection(NBI)*** high performance was also achieved,corresponding to β_(N)≥3,ne/ne_(G)∼0.6,H_(98)∼1.5,f_(bs)∼30%,q_(95)∼4.0,and𝐺∼*** high-β_(N) scenario was successfully modeled using integrated simulation codes,that is,the one modeling framework for integrated tasks(OMFIT).In high-𝛽𝑁plasmas,magnetohydrodynamic(MHD)instabilities are abundant,including low-frequency global MHD oscilla-tion with n=1,high-frequency coherent mode(HCM)at the edge,and neoclassical tearing mode(NTM)and Alfvénic modes in the *** some high-β_(N) discharges,it is observed that the NTMs with m/n=3/2 limit the growth of the plasma energy and decrease β_(N).The low-n global MHD oscillation is consistent with the coupling of destabilized internal(m/n=1/1)and external(m/n=3/1 or 4/1)modes,and plays a crucial role in triggering the onset of *** high-β_(N) on HL-2A suggests that core-edge interplay is key to the plasma confinement enhancement *** to enhance β_(N) will contribute to future plasma operation,such as international thermonuclear experimental reactor.

关键词： High-β_(N) Transport barrier Hybrid scenario Bootstrapcurrent Magnetohydrodynamic

220kV输电工程采用新型预绞式悬垂金具节能效益分析

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山东电力技术 2009年第4期36卷 34-36,72页

作者：李永诰枣庄力源电力设计有限公司山东枣庄277100

分析了输配电线路采用的传统金具的耗能原因,探讨了新型预绞式金具对导线的保护作用,总结了输配电线路采用新型预绞式金具产生的经济效益。

关键词：输配电节能环保金具预绞式电力

新疆准东盆地芨芨湖西矿区地质特征及开采地质条件研究

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煤炭与化工 2023年第1期46卷 39-44页

作者：李永高中国煤炭地质总局第一勘探局河北邯郸056004

通过对芨芨湖西井田地质特征、煤层、聚煤规律等进行综合分析研究,西山窑组在成煤期,历经多次湖进湖退,长期处于浅湖和沼泽交替环境,形成煤层层数多、厚度不均、有分叉合并特点。结合西山窑组水文地质条件、工程地质条件、环境地质条件... 详细信息

通过对芨芨湖西井田地质特征、煤层、聚煤规律等进行综合分析研究,西山窑组在成煤期,历经多次湖进湖退,长期处于浅湖和沼泽交替环境,形成煤层层数多、厚度不均、有分叉合并特点。结合西山窑组水文地质条件、工程地质条件、环境地质条件及其他开采技术条件研究,表明研究区水文地质条件简单;工程地质条件差,具有岩体完整性为中等完整—完整性差—岩体破碎,煤层顶底板岩石稳固性差的特征;环境地质条件中等,煤层瓦斯含量低,具有爆炸性,易燃等。该研究为研究区进一步开发建设提供借鉴意义。

关键词：地质特征煤层开采地质条件芨芨湖西矿区