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Identifying the enhancement mechanism of Al/MoO_(3) reactive multilayered films on the ignition ability of semiconductor bridge using a one-dimensional gas-solid two-phase flow model

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Defence Technology（防务技术） 2024年第3期33卷 168-179页

作者： Jianbing Xu Yuxuan Zhou Yun Shen Yueting Wang Yinghua Ye Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Micro-Nano energetic Devices Key laboratory of MIIT Nanjing 210094China Institute of Space Propulsion Nanjing University of Science and TechnologyNanjing 210094China

energetic Semiconductor bridge(ESCB)based on reactive multilayered films(RMFs)has a promising application in the miniature and intelligence of initiator and pyrotechnics *** the ignition enhancement mechanism of RMFs on semiconductor bridge(SCB)during the ignition process is crucial for the engineering and practical application of advanced initiator and pyrotechnics *** this study,a one-dimensional(1D)gas-solid two-phase flow ignition model was established to study the ignition process of ESCB to charge particles based on the reactivity of Al/MoO_(3) *** order to fully consider the coupled exothermic between the RMFs and the SCB plasma during the ignition process,the heat release of chemical reaction in RMFs was used as an internal heat source in this *** is found that the exothermal reaction in RMFs improved the ignition performance of *** the process of plasma rapid condensation with heat release,the product of RMFs enhanced the heat transfer process between the gas phase and the solid charge particle,which accelerated the expansion of hot plasma,and heated the solid charge particle as well as gas phase region with low *** addition,it made up for pressure loss in the gas *** the plasma dissipation process,the exothermal chemical reaction in RMFs acted as the main heating source to heat the charge particle,making the surface temperature of the charge particle,gas pressure,and gas temperature rise *** result may yield significant advantages in providing a universal ignition model for miniaturized ignition devices.

关键词： Ignition enhancement mechanism 1D gas-solid two-phase flow Al/MoO_(3)reactive multilayered films Semiconductor bridge Miniaturized ignition device

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Summary of the 11th Conference on Magnetic Confined fusion Theory and Simulation

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Plasma Science and Technology 2024年第10期26卷 1-7页

作者： Guangzhou HAO Jianqiang XU Youwen SUN Zhibin GUO Organizing Committee of the 11th Conference on Magnetic Confined fusion Theory and Simulation Southwestern Institute of Physics Chengdu 610041People’s Republic of China Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China State Key laboratory of Nuclear Physics and Technology Fusion Simulation CenterSchool of PhysicsPeking UniversityBeijing 100871People’s Republic of China 不详

This conference report summarizes recent progress in plasma theory and simulation that was presented in contributed papers and discussions at the 11th Conference on Magnetic Confined fusion Theory and Simulation(CMCFTS)held in Chengdu,China,27–30 October,*** in various fields has been *** example,results on zonal flow generation by mode coupling,simulations of the key physics of divertor detachment,energetic particle effects on magnetohydrodynamic(MHD)modes in addition to ion-and electron-scale turbulence,physics of edge coherent modes and edge-localized modes,and the optimization of ion heating schemes as well as confinement scenarios using advanced integrated modeling are presented at the *** this conference,the scientific research groups were organized into six categories:(a)edge and divertor physics;(b)impurity,heating,and current drive;(c)energetic particle physics;(d)turbulent transport;(e)MHD instability;and(f)integrated modeling and code development.A summary of the highlighted progress in these working groups is presented.

关键词： magnetic confined fusion(MCF) theory and simulation modeling tokamak

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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

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Interaction between energetic-ions and internal kink modes in a weak shear tokamak plasma

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Plasma Science and Technology 2022年第2期24卷 28-35页

作者： Xiaolong ZHU Feng WANG Wei CHEN Zhengxiong WANG Key laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Eduction)School of PhysicsDalian University of TechnologyDalian 116024People's Republic of China Key Laboratory of Materials Modification by LaserIon and Electron Beams(Ministry of Eduction)School of PhysicsDalian University of TechnologyDalian 116024People's Republic of China joint laboratory for fusion product and energetic particles Southwestern Institute of PhysicsChengdu 610041People's Republic of China

Based on the conventional tokamak HL-2 A-like parameters and profiles,the linear properties and the nonlinear dynamics of non-resonant kink mode(NRK)and non-resonant fishbone instability(NRFB)in reversed shear tokamak plasmas are investigated by using the global hybrid kinetic-magnetohydrodynamic nonlinear code M3 *** work mainly focuses on the effect of passing energetic-ions on the NRK and NRFB instabilities,which is different from the previous *** is demonstrated that the NRFB can be destabilized by the passing energeticions when the energetic-ion betaβ;exceeds a critical *** transition from NRK to NRFB occurs when the energetic-ion betaβ;increases to above a critical *** resonance condition responsible for the excitation of NRFB is interestingly found to be satisfied atω;+ω;≈ω,whereω;is the toroidal motion frequency,ω;is the poloidal motion frequency andωis the mode *** nonlinear evolutions of NRFB’s mode structures and Poincaréplots are also analyzed in this work and it is found that the NRFB can induce evident energeticion loss/redistribution,which can degrade the performance of the *** findings are conducive to understanding the mechanisms of NRFB induced energetic-ion loss/redistribution through nonlinear wave-particle interaction.

关键词： energetic-ions non-resonant fishbone weak shear loss/redistribution

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Test particle simulation on the ion and electron zebra stripes and their time evolution in inner radiation belt

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Science China(Technological Sciences) 2018年第4期61卷 623-632页

作者： WANG YongFu ZONG QiuGang ZHOU XuZhi State Key laboratory of Nuclear Physics and Technology School of Physics and Fusion Simulation CenterPeking University Institute of Space Physics and Applied Technology Peking University Key laboratory of Earth and Planetary Physics Chinese Academy of Sciences

During February 15–16, 2014, the energetic electron spectrogram for four successive inner radiation belt crossing show clearly the electron zebra structures and their time evolution which last for about 17 h. Unfortunately, the time of flight(TOF) in RBSPICE measurement is turned off below 3 RE, and the ion measurement is contaminated by electrons. Thus in this study we studied the differences between the ion and electron zebra stripe structures and their time evolution using simple theory and test particle simulation, combining the electron measurement from RBSIPICE onboard Van Allen Probes. Theoretical analysis predicts that the ion zebra stripe structures should lie at a higher energy range than the corresponding electron zebra stripe structures due to that the directions of gradient B drift and corotation E×B drift are the same for electrons while opposite for ions. Test particle simulation with the dipole magnetic field and Volland-Stern electric field model have shown that the ion and electron zebra stripe structures could be produced by the convection electric field penetrating into the inner magnetosphere in this event, with their time evolution determined by total drift velocity that are different for ions and electrons. The predicted differences between the ion and electron zebra stripe structures are partially verified through observation. The ion zebra stripe structures could have potential influence to the ring current.

关键词： inner radiation belt ion zebra stripes energetic ions energetic electrons

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Frequency multiplication with toroidal mode number of kink/fishbone modes on a static HL-2A-like tokamak

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Plasma Science and Technology 2022年第12期24卷 56-66页

作者： Zhihui ZOU Ping ZHU Charlson C KIM Wei DENG Xianqu WANG Yawei HOU CAS Key laboratory of Geospace Environment and Department of Plasma Physics and fusion Engineering University of Science and Technology of ChinaHefei 230026People's Republic of China International joint Research laboratory of Magnetic Confinement fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Department of Engineering Physics University of Wisconsin-MadisonMadisonWisconsin 53706United States of America SLS2 Consulting San DiegoCalifornia 92107United States of America Southwestern Institute of Physics Chengdu 610041People's Republic of China Institute of fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China School of Mathematics and Physics Anhui Jianzhu UniversityHefei 230601People's Republic of China

In the presence of energetic particles(EPs),the long-lived mode(LLM) frequency multiplication with n=1,2,3,or higher is often observed on HL-2A,where n is the toroidal mode *** kinetic-MHD model simulations of the energetic particle(EP) driven kink/fishbone modes on a static HL-2A-like tokamak using NIMROD code find that when the background plasma pressure is relatively high,and the EP pressure and the beam energy are relatively low,the mode frequency increases almost linearly with EP pressure,and the frequency is proportional to n(’frequency multiplication’),even in the absence of any equilibrium plasma *** addition,the frequency multiplication persists as the safety factor at the magnetic axis q_(0)*** the absence of EPs,the growth rate of the 1/1 mode is the largest;however,as the EP pressure increases,the growth rate of 2/2 modes or 3/3 modes becomes dominant,suggesting that higher-n modes are more vulnerable to *** results may shed light on the understanding of the toroidal mode number dependence of kink/fishbone modes in the advanced scenarios of tokamaks with weak or reversed central magnetic shear.

关键词： internal kink mode fishbone mode long-lived mode(LLM) energetic particles(EPs) HL-2A NIMROD

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energetic-ion excited internal kink modes with weak magnetic shear in q0> 1 tokamak plasmas

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Chinese Physics B 2017年第8期26卷 259-264页

作者：陈文明王晓钢王先驱张瑞斌 State Key laboratory of Nuclear Physics and Technology School of Physics Peking University Department of Physics Harbin Institute of Technology Institute of fusion Science School of Physical Science and Technology Southwest Jiaotong University

The energetic particle driven internal kink mode is investigated in this paper for q0〉 1 tokamak plasma with weak magnetic shear. With the effect of energetic particles, the m/n = 1/1 internal mode structure in tokamak plasma does not appear as a rigid step-function when safety factor passes through q = 1 rational surface. It is found that even when the rational surface is removed, the mode may be still unstable under the low magnetic shear condition if the energetic particle drive is strong enough; with the low shear region of safety factor profile widening, the mode becomes more unstable with its growth-rate increasing. Furthermore, we find that the existence of the q = 1 rational surface does not have a significant effect on the stability of the plasma if energetic particles are present, which is very different from the scenarios of the ideal-MHD modes.

关键词： tokamak instabilities low magnetic shear internal kink mode

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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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Recent progress in the interaction between energetic particles and tearing modes

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National Science Review 2022年第11期9卷 240-261页

作者： Huishan Cai Ding Li Chinese Academy of Sciences Key laboratory of Geospace Environment School of Nuclear Sciences and TechnologyUniversity of Science and Technology of China Institute of Physics Chinese Academy of Sciences Songshan Lake Materials laboratory

The dynamics of energetic particles and tearing modes and the interactions between them are of great significance for magnetically confined fusion plasmas. In this review, we focus on these issues in the context of tokamak plasmas. The interaction between energetic particles and tearing modes is considered from two perspectives:(i) the influence of energetic particles on tearing modes and(ii) the transport of energetic particles by tearing modes. The influence of energetic particles on tearing modes is described on the basis of a general dispersion relation for tearing modes. The effects of energetic particles are considered separately in the outer region and the island region of a tearing mode. The physics mainly results from the modification of the perturbed parallel current by energetic particles without wave–particle resonance. In addition, the resonance between energetic particles and tearing modes is also reviewed. For the transport of energetic particles, transport of both circulating and trapped energetic particles by tearing mode is reviewed. Our descriptions of physical phenomena here are based on an analytical approach, while the experiments and simulations are used to illustrate and confirm our results. Finally, a number of open issues are discussed.

关键词： magnetically confined plasma energetic particle tearing mode transport confinement tokamak

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Development of the real-time double-ring fusion neutron time-of-flight spectrometer system at HL-2M

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Nuclear Science and Techniques 2019年第12期30卷 22-30页

作者： Bo-Wen Zheng Wei Zhang Tong-Yu Wu Si-Cheng Huang Yi-Po Zhang Xiu-Feng Xu Shi-Biao Tang Ze-Jie Yin State Key laboratory of particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Southwestern Institute of Physics Chengdu 610041China

A real-time double-ring neutron time-of-flight(TOFII) spectrometer system has been proposed to achieve plasma diagnosis on HL-2M tokamak with a relatively high count rate and sufficient energy *** TOFII system is in its development stage,and this work describes its characteristics in terms of design principle,system structure,electronic system design,preliminary tests,and neutron transport *** preliminary test results illustrate that the TOFII system can demonstrate the realtime dynamic spectrum every 10 *** results also show that based on the support vector machine method,the n-γ discrimination algorithm achieves the discrimination accuracy of 99.1%with a figure of merit of 1.30,and the intrinsic timing resolution of the system is within 0.3%.The simulated flight time spectrums from 1 to 5 MeV are obtained through the Monte Carlo tool Geant4,which also provide the reasonable *** TOFII system will then be calibrated on mono-energetic neutron sources for further verification.

关键词： Time-of-light Neutron spectrometer Geant4 HL-2M

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