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Generation of strong magnetic fields with a laser-driven coil

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High Power Laser Science and Engineering 2018年第3期6卷 1-8页

作者： Zhe Zhang baojun zhu Yutong Li Weiman Jiang Dawei Yuan Huigang Wei Guiyun Liang Feilu Wang Gang Zhao Jiayong Zhong Bo Han Neng Hua Baoqiang zhu Jianqiang zhu Chen Wang Zhiheng Fang Jie Zhang Beijing National Laboratory of Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China Collaborative Innovation Center oflFSA (CICIFSA) Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Department of Astronomy Beijing Normal University Beijing 100875 China National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Shanghai 201800 China Shanghai Institute of Laser Plasma Shanghai 201800 China Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China

As a promising new way to generate a controllable strong magnetic field, laser-driven magnetic coils have attracted interest in many research fields. In 2013, a kilotesla level magnetic field was achieved at the Gekko XII laser facility with a capacitor-coil target. A similar approach has been adopted in a number of laboratories, with a variety of targets of different shapes. The peak strength of the magnetic field varies from a few tesla to kilotesla, with different spatio- temporal ranges. The differences are determined by the target geometry and the parameters of the incident laser. Here we present a review of the results of recent experimental studies of laser-driven magnetic field generation, as well as a discussion of the diagnostic techniques required for such rapidly changing magnetic fields. As an extension of the magnetic field generation, some applications are discussed.

关键词： lab astrophysics laser-plasma interaction magnetic field plasma astrophysics

Measurement and analysis of K-shell lines of silicon ions in laser plasmas

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High Power Laser Science and Engineering 2018年第2期6卷 133-140页

作者： Bo Han Feilu Wang Jiayong Zhong Guiyun Liang Huigang Wei Dawei Yuan baojun zhu Fang Li Chang Liu Yanfei Li Jiarui Zhao Zhe Zhang Chen Wang Jun Xiong Guo Jia Neng Hua Jianqiang zhu Yutong Li Gang Zhao Jie Zhang Department of Astronomy Beijing Normal University Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Research Center for Laser Fusion China Academy of Engineering Physics National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy Shanghai Jiao Tong University

We present laboratory measurement and theoretical analysis of silicon K-shell lines in plasmas produced by Shenguang II laser facility, and discuss the application of line ratios to diagnose the electron density and temperature of laser *** types of shots were carried out to interpret silicon plasma spectra under two conditions, and the spectra from 6.6 ?A to6.85 ?A were measured. The radiative-collisional code based on the flexible atomic code(RCF) is used to identify the lines, and it also well simulates the experimental spectra. Satellite lines, which are populated by dielectron capture and large radiative decay rate, influence the spectrum profile significantly. Because of the blending of lines, the traditional G value and R value are not applicable in diagnosing electron temperature and density of plasma. We take the contribution of satellite lines into the calculation of line ratios of He-α lines, and discuss their relations with the electron temperature and density.

关键词： high energy density physics laser plasmas interaction plasmas astrophysics

Laser-driven plasma collider for nuclear studies

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Science Bulletin 2015年第13期60卷 1211-1213页

作者： Changbo Fu Jie Bao Liming Chen Jianjun He Long Hou Liang Li Yanfei Li Yutong Li Guoqian Liao Yongjoo Rhee Yang Sun Shiwei Xu Dawei Yuan Xiaopeng Zhang Gang Zhao Jiarui Zhao baojun zhu Jianqiang zhu Jie Zhang Department of Physics and Astronomy Shanghai Jiao Tong University Physics Department China Institute of Atomic Energy Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University Institute of Modern Physics Chinese Academy of Sciences Nuclear Data Center Korea Atomic Energy Research Institute National Astronomical Observatories Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

A novel method of initiating nuclear fusion reactions in a full plasma environment was suggested, and a proof-of-concept experiment was carried out with the D ＋D → n＋3He reaction. In this new approach, two plasma jets generated by high-intensity lasers collide headon-head. The center-of-mass energy of the nuclei increases accordingly, and therefore, reaction products can be significantly enhanced, especially in the sub-Coulomb barrier ranges. As a result of the fusion reaction, up to - 7.6 ×105 neutrons had been observed. This new type of ＂plasma collider＂ could provide an innovative tool to study nuclear reactions under astrophysical conditions.

关键词： Plasma collider - D-D neutron .Laboratory nuclear astrophysics - High-intensity laser

自蔓延高温合成La_(1-x)Sr_xMnO_3过程中杂质产生原因的热力学分析

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稀有金属材料与工程 2007年第3期36卷 513-516页

作者：祝宝军陶颖贡涛唐元洪王平湖南大学材料科学与工程学院湖南长沙410082 中南大学材料科学与工程学院湖南长沙410083

热力学计算和实验分析相结合,分析了自蔓延高温合成La1-xSrxMnO3过程中杂质产生的原因并给出了消除杂质的方法。结果表明:当采用MnO2稀释剂时,由于生成La2SrO4的吉布斯自由能与生成SrMnO3的自由能相当,自蔓延高温合成产物中容易生成La2S... 详细信息

热力学计算和实验分析相结合,分析了自蔓延高温合成La1-xSrxMnO3过程中杂质产生的原因并给出了消除杂质的方法。结果表明:当采用MnO2稀释剂时,由于生成La2SrO4的吉布斯自由能与生成SrMnO3的自由能相当,自蔓延高温合成产物中容易生成La2SrO4杂质相,采用La1-xSrxMnO3作稀释剂,可以避免La2SrO4的产生;当稀释剂较多时,合成产物中容易产生Mn3O4杂质相,消除的方法是控制稀释剂添加量,控制自蔓延反应速度和体系温度。

关键词：固体氧化物燃料电池自蔓延高温合成热力学 La1-x SrxMnO3

非灭菌光发酵嗜硫原始红藻高效去除工业废水中铵根的补糖模式优化

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环境工程学报 2022年第3期16卷 989-998页

作者：余建英朱宝君魏东华南理工大学食品科学与工程学院广州510640

使用高氨氮工业废水配制混养培养基,在5 L光发酵罐中对嗜硫原始红藻(Galdieria sulphuraria)进行非灭菌条件下的分批和补料分批培养,通过比较间歇补糖和连续流加补糖模式,优化确定了生物量高产率、高NH_(4)^(+)去除速率的补糖模式。结... 详细信息

使用高氨氮工业废水配制混养培养基,在5 L光发酵罐中对嗜硫原始红藻(Galdieria sulphuraria)进行非灭菌条件下的分批和补料分批培养,通过比较间歇补糖和连续流加补糖模式,优化确定了生物量高产率、高NH_(4)^(+)去除速率的补糖模式。结果表明,2种模式均能促进生物量生产和NH_(4)^(+)的去除,其中C/N为2.5~5.0的连续流加补糖是最佳补糖模式。在此模式下,最高N H_(4)^(+)去除速率达到1529.25 mg·(L·d)^(-1),最终生物量质量浓度、蛋白质和藻蓝蛋白(PC)含量分别为92.30 g·L^(-1)、42.29%和1.76 mg·g^(-1),比12 h间歇补糖模式(最高1234.38 mg·(L·d)^(-1),生物量质量浓度为89.55 g·L^(-1),蛋白质和PC含量为别为38.32%和1.66 mg·g^(-1))分别提高了23.89%、3.07%、10.36%和6.02%,葡萄糖消耗量也显著降低。以上构建的基于优化补糖模式的非灭菌光发酵技术能有效促进嗜硫原始红藻生物量生产,可实现废水中NH_(4)^(+)的高效去除并联产蛋白质,从而达到废水高效脱氮、资源化利用和降本增效等多重目的。

关键词：嗜硫原始红藻非灭菌光发酵高氨氮废水铵根去除葡萄糖补加

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Observation of Zeeman splitting effect in a laser-driven coil

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Matter and Radiation at Extremes 2022年第2期7卷 18-24页

作者： baojun zhu Zhe Zhang Chang Liu Dawei Yuan Weiman Jiang Huigang Wei Fang Li Yihang Zhang Bo Han Lei Cheng Shangqing Li Jiayong Zhong Xiaoxia Yuan Bowei Tong Wei Sun Zhiheng Fang Chen Wang Zhiyong Xie Neng Hua Rong Wu Zhanfeng Qiao Guiyun Liang Baoqiang zhu Jianqiang zhu Shinsuke Fujioka Yutong Li Beijing National Laboratory of Condensed Matter Physics Institute of PhysicsCASBeijing 100190China Institute of Laser Engineering Osaka University2-6 Yamada-okaSuitaOsakaJapan Songshan Lake Materials Laboratory DongguanGuangdong 523808China Department of Advanced Photon Research Kansai Photon Science InstituteNational Institutes for Quantum and Radiological Science and Technology619-0215 KyotoJapan Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Department of Astronomy Beijing Normal UniversityBeijing 100875China Center for Advanced Material Diagnostic Technology College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China Shanghai Institute of Laser Plasma Shanghai 201800China National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

The Zeeman splitting effect is observed in a strong magnetic field generated by a laser-driven *** expanding plasma from the coil wire surface is concentrated at the coil center and interacts with the simultaneously generated magnetic *** Cu I spectral lines at wavelengths of 510.5541,515.3235,and 521.8202 nm are detected and *** splittings of spectral lines are used to estimate the magnetic field strength at the coil center as∼31.4±15.7 T at a laser intensity of∼5.6310^(15) W/cm^(2),which agrees well with measurements using a B-dot *** other plasma parameters of the central plasma disk are also *** temperature is evaluated from the Cu I spectral line intensity ratio,while the electron density is estimated from the Stark broadening effect.

关键词： laser splitting effect

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近三十年江苏历史档案汇编研究

档案与建设 2015年第11期 24-27页

作者：赵彦昌朱宝君辽宁大学历史学院辽宁沈阳110136

文章首先对近三十年江苏的历史档案汇编成果作了详细统计,在此基础上总结档案编研工作的发展趋势与特点,最后对江苏省历史档案汇编工作进行了客观评价,并针对不足提出了可行性建议。

关键词：江苏文献统计历史档案汇编商会档案档案编纂

Laboratory study of astrophysical collisionless shock at SG-Ⅱ laser facility

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High Power Laser Science and Engineering 2018年第3期6卷 65-72页

作者： Dawei Yuan Huigang Wei Guiyun Liang Feilu Wang Yutong Li Zhe Zhang baojun zhu Jiarui Zhao Weiman Jiang Bo Han Xiaoxia Yuan Jiayong Zhong Xiaohui Yuan Changbo Fu Xiaopeng Zhang Chen Wang Guo Jia Jun Xiong Zhiheng Fang Shaoen Jiang Kai Du Yongkun Ding Neng Hua Zhanfeng Qiao Shenlei Zhou Baoqiang zhu Jianqiang zhu Gang Zhao Jie Zhang Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Department of Astronomy Beijing Normal University Beijing 100875 China Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Collaborative Innovation Center oflFSA (CICIFSA) Shanghai Jiao Tong University Shanghai 200240 China INPAC and School of Physics and Astronomy Shanghai Jiao Tong University Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai 200240 China Shanghai Institute of Laser Plasma Shanghai 201800 China Research Center for Laser Fusion China Academy of Engineering Physics Mianyang 621900 China National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Shanghai 201800 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing 101408 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China

Astrophysical collisionless shocks are amazing phenomena in space and astrophysical plasmas, where supersonic flows generate electromagnetic fields through instabilities and particles can be accelerated to high energy cosmic rays. Until now, understanding these micro-processes is still a challenge despite rich astrophysical observation data have been obtained. Laboratory astrophysics, a new route to study the astrophysics, allows us to investigate them at similar extreme physical conditions in laboratory. Here we will review the recent progress of the collisionless shock experiments performed at SG-II laser facility in China. The evolution of the electrostatic shocks and Weibel-type/filamentation instabilities are observed. Inspired by the configurations of the counter-streaming plasma flows, we also carry out a novel plasma collider to generate energetic neutrons relevant to the astrophysical nuclear reactions.

关键词： collisionless shock electromagnetic field high power lasers laboratory astrophysics

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煤矿皮带机常见故障及其处理措施

能源与节能 2024年第7期 302-304页

作者：祝宝君大同科大煤机有限公司山西大同037003

对煤矿皮带机工作原理、结构及故障分类进行分析。针对电气、机械和传感器故障,提出了排查、定位和处理措施,有利于深入了解煤矿皮带机故障处理的综合方法和实际应用。

关键词：煤矿皮带机故障故障处理