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能散度对束输运和聚焦的影响

信息与电子工程 2004年第3期2卷 219-221,231页

作者：王文斗冯莉王强李献文李平邓建军中国工程物理研究院流体物理研究所四川绵阳621900

为了分析不同能散度的入射束流在直线感应加速器加速段和聚焦段的行为,利用束包络计算模型进行了计算考察,给出束流不同能散度对聚焦焦斑造成模糊范围的大小。计算结果表明,降低入射束流的能散度可显著降低焦斑的模糊范围。同时通过近... 详细信息

为了分析不同能散度的入射束流在直线感应加速器加速段和聚焦段的行为,利用束包络计算模型进行了计算考察,给出束流不同能散度对聚焦焦斑造成模糊范围的大小。计算结果表明,降低入射束流的能散度可显著降低焦斑的模糊范围。同时通过近似计算给出了由于加速间隙电压波动引起束聚焦焦斑模糊范围增大的上限值。

关键词：高能物理学能散度束包络束输运焦斑直线感应加速器

GeV重离子束辐照LiF引起的晶体内部结构改变

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物理学报 2024年第15期73卷 147-153页

作者：陈宇鹏史路林王瑜玉程锐杨杰陈良文范伟丽董俊煜河北大学物理与科学技术学院保定071002 中国科学院近代物理研究所兰州730000 西北师范大学物理与电子工程学院兰州730070 先进能源科学与技术广东省实验室惠州516000

高能强流重离子束入射到固体物质中,沿飞行路径的离子能量沉积密度将改变宏观靶物质的温度和压强等,并可能在高压高密条件下产生新的材料缺陷.本文利用兰州重离子加速器装置HIrFL-CSr引出的能量为264 MeV/u的Xe^(36+)离子束,入射到LiF... 详细信息

高能强流重离子束入射到固体物质中,沿飞行路径的离子能量沉积密度将改变宏观靶物质的温度和压强等,并可能在高压高密条件下产生新的材料缺陷.本文利用兰州重离子加速器装置HIrFL-CSr引出的能量为264 MeV/u的Xe^(36+)离子束,入射到LiF晶体靶物质中,在线测量了LiF的发射光谱,观测到沿离子路径的晶体颜色变化.通过解离方法取得了不同位置处的X射线衍射(X-ray Diffraction)与X射线光电子能谱结果,显示在Xe离子的布拉格峰区域出现了LiF_(3)(LiF+F_(2))结构相,讨论了新的结构缺陷的产生与重离子束能量沉积密度间可能的相关性.这为离子束驱动的高能量密度物理的能量沉积过程提供了一定参考.

关键词： LiF 晶体重离子束能量密度色心

中高Z元素原子、离子的电子碰撞电离与激发截面快速计算方法

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物理学报 2024年第10期73卷 105-115页

作者：周旭王川胡荣豪陶治豪邓小良梁亦寒李晓亚吕蒙祝文军四川大学物理学院成都610064 高能量密度物理及技术教育部重点实验室成都610065 辐射物理及技术教育部重点实验室成都610065 中国工程物理研究院流体物理研究所绵阳621000

中高Z元素的原子数据如碰撞电离和碰撞激发截面在聚变工程、X射线与物质相互作用等工程及研究领域有非常广泛的需求.高能量密度等离子体中存在从基态到激发态的原子和各价态离子,其碰撞电离和碰撞激发截面需要分别计算.本文以73号元素钽... 详细信息

中高Z元素的原子数据如碰撞电离和碰撞激发截面在聚变工程、X射线与物质相互作用等工程及研究领域有非常广泛的需求.高能量密度等离子体中存在从基态到激发态的原子和各价态离子,其碰撞电离和碰撞激发截面需要分别计算.本文以73号元素钽(Ta)为例,基于相对论性Dirac-Fock理论和扭曲波模型计算了基态Ta原子到Ta^(72+)离子在入射电子能量范围为1-150 keV的碰撞电离与碰撞激发截面,并与相关实验和理论模型符合较好.通过分析Ta的碰撞电离和碰撞激发截面数据中的规律,给出两种减少计算量的方法:对初态能级进行随机抽样、筛去贡献小的反应道,并对计算量的优化程度和误差做出评估.最终结果可在误差5%内将计算效率提高一个数量级,本文所提方法可推广至其他中高Z元素的计算.

关键词：碰撞电离碰撞激发扭曲波模型原子数据

realization of simultaneous balanced multi-outputs for multi-protocols QKD decoding based onsilica-based planar lightwave circuit

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Chinese physics B 2021年第8期30卷 224-230页

作者： Jin You Yue wang jun-Ming An State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing 100049China College of Materials Science and Opto-electronic Technology University of Chinese Academy of SciencesBeijing 100049China

Silica-based planar lightwave circuit(pLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A pLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated,which is composed of variable optical splitters(VOSs),asymmetric Mach-Zehnder interferometers(AMZIs),and variable directional couplers(VDCs).Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps,*** chip has advantages in achieving high interference visibility and low quantum bit error rate(QBEr).

关键词： quantum key distribution(QKD) planar lightwave circuit(pLC) multi-protocols decoder

A lithium–tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries

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rare Metals 2024年第2期43卷 575-587页

作者： Lei Zhang Qian-Kun Meng Xiang-ping Feng Ming Shen Yu-Qing Zhang Quan-Chao Zhuang run-Guo Zheng Zhi-Yuan wang Yan-Hua Cui Hong-Yu Sun Yan-Guo Liu School of Materials Science and engineering Northeastern UniversityShenyang110819China School of resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China School of Materials and physics China University of Mining&TechnologyXuzhou221116China institute of electronic engineering China Academy of Engineering PhysicsMianyang621900China

The high energy density and stability of solid-state lithium metal batteries(SSLMBs)have garnered great ***-type oxides,especially Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO),with high ionic conductivity,wide electrochemical window,and stability to Li metal anode,are promising solid-state electrolyte(SSEs)materials for ***,Li/LLZTO interface issues including high interface resistance,inhomogeneous Li deposition,and Li dendrite growth have hindered the practical application of ***,a multi-functional Li–SnF_(2) composite anode with Li,LiF,and Li-Sn alloy was specifically designed and *** composite anode improves the wettability to LLZTO,constructing an intimate contact interface between it and ***,ionic/electronic conductive paths in situ formed at the interface can effectively uniform Li deposition and suppress Li *** solid-state symmetric cell exhibits low interface resistance(11Ω·cm^(2)) and high critical current density(1.3 mA·cm^(−2))at 25℃.The full SSLMB based on LiFepO_(4) or LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode also shows stable cycling performance and high rate *** work provides a new composite anode strategy for achieving high-energy density and high-safety SSLMBs.

关键词： Solid-state lithium metal batteries(SSLMBs) Lithium-tin fluoride anode Ionic/electronic conductive Interface resistance Lithium dendrite

液态金属改性微米Al-氟聚物的3D打印及性能表征

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火炸药学报 2024年第5期47卷 430-437,I0004页

作者：陈颖张世龙陈婵娟何奥伍波王军沈金朋裴重华西南科技大学材料与化学学院四川绵阳621010 西南科技大学国防科技学院四川绵阳621010 西南科技大学环境友好能源国家重点实验室四川绵阳621010 中国工程物理研究院化工材料研究所四川绵阳621900

为了研究镓基液体金属(GLM)-Al-氟聚物的能量释放性能,制备了GLM质量分数分别为1%、3%、5%、7%的GLM-Al,通过3D打印获得了GLM-Al-氟聚物复合反应性材料;采用SEM、EDS、XrD、XpS、DSC-TG、高速摄影仪和万能拉伸仪对GLM-Al及GLM-Al-氟聚... 详细信息

为了研究镓基液体金属(GLM)-Al-氟聚物的能量释放性能,制备了GLM质量分数分别为1%、3%、5%、7%的GLM-Al,通过3D打印获得了GLM-Al-氟聚物复合反应性材料;采用SEM、EDS、XrD、XpS、DSC-TG、高速摄影仪和万能拉伸仪对GLM-Al及GLM-Al-氟聚物的微观结构、燃烧性能、力学性能等进行测试。结果表明,质量分数3%的GLM改性的GLM-Al放热量和氧化增重均最大,分别为6181 J/g和42.92%;改性前的Al-氟聚物不能被点燃,改性后GLM-Al-氟聚物可以点燃且可以持续稳定燃烧,在当量比为3.5时的燃速最大,为6.0 mm/s;此时GLM-Al-氟聚物的抗拉强度和断裂伸长率均最大,分别为1.73 Mpa、11486%,是改性前Al-氟聚物的1.5倍和1.3倍。

关键词：增材制造镓基液态金属 GLM 微米铝粉氟聚物 3D打印燃烧

Hydrothermal synthesis of two-dimensional MoS_(2)and its applications

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Tungsten 2019年第1期1卷 59-79页

作者： Xiaoyan Zhang Guoqing Ma jun wang Laboratory of Micro-Nano Optoelectronic Materials and Devices Key Laboratory of Materials for High-Power LaserShanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China Center of Materials Science and Optoelectronic engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of High Field Laser physics Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China CAS Center for Excellence in Ultra-intense Laser Science(CEULS) Shanghai 201800China

Two-dimensional(2D)transition metal dichalcogenides(TMDs)have attracted tremendous attention because of their unique electronic,optical and chemical properties.2D TMDs,especially 2D MoS2,have been proved to show great potential in vari-ous applications such as sensing,hydrogen evolution and lithium ion ***,methods for the scalable preparation of 2D materials and 2D nanocomposites of high quality and low cost must be *** the various synthesis meth-ods,the hydrothermal synthesis method is simple and can meet the above *** this review,the recent advances in the controllable hydrothermal synthesis of 2D MoS_(2)and its nanocomposites by the hydrothermal synthesis method are *** provide insight into the growth mechanisms of few-layered 2D MoS_(2)with different morphologies and the key technologies to realize wafer-scale growth of continuous and homogeneous 2D films which are important for practical ***,the typical applications of TMDs in nonlinear optics as ultrafast optical modulation devices are pre-sented based on work of our *** more clarity,we summarize the current challenges of the hydrothermal synthesis method encountering,and suggest solutions to these challenges concerning future developments in practical applications.

关键词： Hydrothermal synthesis Transition metal dichalcogenides MoS_(2) Two dimension Nonlinear optics

Experimental investigation of the detection and location of a target in layered media by using the Tr-rTM mixed method

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Science china(physics,Mechanics & Astronomy) 2019年第3期62卷 75-81页

作者： Xiang Gao Jian Li jun Ma junHong Li FangFang Shi Wen wang ChengHao wang institute of Acoustics Chinese Academy of Sciences University of Chinese academy of Sciences School of electronic and Electrical engineering Wuhan Textile University State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

Targets in layered media can be detected and located using a time reversal(Tr)-reversed-time migration(rTM) mixed *** this study, this single emission-multiple receiving method is tested experimentally by using two types of layered media and three types of targets. The signal reflected at the interface and the signal scattered by the target are measured by each receiver to obtain the travel time for several transmitter-receiver pairs. Thereafter, the amplitude ratio between the two measured signals is compared with the theoretical amplitude. The rTM process involves the convolution of the forward acoustic beam from the source with the backward acoustic beam from the receiver which adds an appropriate delay determined on the measured travel time data. By using this approach, the acoustic field distribution can be obtained, and the position of the target can be ***, the measured positions of the target are compared with the actual position to validate the accuracy of this technique.

关键词： time reversal reversed-time migration ultrasonic detection layered media

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铀在水汽中的腐蚀机制及影响因素

冶金分析 2024年第5期44卷 14-24页

作者：姜交来邓辉张骏中国工程物理研究院材料研究所四川绵阳621907

铀在水汽中的腐蚀是核工业界长期关注的重点问题。铀与水汽反应会产生氢气,存在很大安全隐患,同时氢气与铀反应,导致严重的氢化腐蚀。理解铀在水汽中的腐蚀机制和动力学,有助于更加准确评估铀的腐蚀状态,从而指导铀燃料的安全贮存。为此... 详细信息

铀在水汽中的腐蚀是核工业界长期关注的重点问题。铀与水汽反应会产生氢气,存在很大安全隐患,同时氢气与铀反应,导致严重的氢化腐蚀。理解铀在水汽中的腐蚀机制和动力学,有助于更加准确评估铀的腐蚀状态,从而指导铀燃料的安全贮存。为此,本文分析了铀水反应的特征,概述了铀水腐蚀过程的研究手段,探讨了铀在抛物线和线性两个不同动力学阶段的反应过程,总结了铀水腐蚀产物的物理化学特性,重点讨论了氢化铀(UH_(3))的生成条件及检测方法。系统综述了铀水腐蚀反应的几种机制模型,比较了各个模型的异同点。并详细讨论了影响铀水腐蚀过程的因素,如氧气、铀样品的预处理过程、杂质含量等。

关键词：铀水腐蚀腐蚀机制氧气氢化铀