作者单位
摘要
上海交通大学 物理与天文学院,上海 200240
温稠密物质状态是惯性约束聚变过程及天体演化过程中的重要物质发展阶段。随着密度的增加,量子效应逐渐显现并导致包括温稠密参数下集体激发行为与经典等离子体模型之间出现差异。密度泛函动理学方法是基于含时密度泛函理论建立的统计模型,并依据Wigner分布函数(相空间量子力学)发展的动理学输运方法,可以有效弥补经典等离子体理论对量子效应的忽略。基于密度泛函动理学方法,发现温稠密特征参数内费米狄拉克分布、交换关联效应、量子衍射效应等性质都对双流不稳定性起到抑制作用。密度泛函动理学方法有望为等离子体视角研究温稠密系统输运性质提供第一性的理论平台。
温稠密物质 密度泛函动理学 Wigner分布函数 量子衍射效应 交换关联效应 双流不稳定性 warm dense matter density functional kinetic theory Wigner distribution function quantum diffraction effects exchange-correlation effects two-stream instability 
强激光与粒子束
2023, 35(1): 012011
作者单位
摘要
1 西安交通大学 物理学院,西安 710049
2 中国科学院 近代物理研究所,兰州 730000
强流高能离子束可以准等容加热任何高密度样品,制备出尺度大、状态均匀、内部无冲击波的高能量密度物质,为实验室研究高能量密度物理提供了一种独特的新手段。介绍了国内外典型的强流重离子加速器装置及其与高能量密度物理相关的关键参数设计和研究规划;展示了基于粒子和流体模拟的离子束驱动高能量密度物质产生和状态演化规律进展;介绍了一套兼具高时空分辨和高穿透力的高能电子成像诊断技术;分析了中低能区离子束与等离子体相互作用过程中的碰撞和电荷交换微观机制,以及激光加速超短超强离子束在等离子体中的非线性输运和欧姆能损机制。
强流离子加速器 温稠密物质 高能电子成像诊断 能量沉积和输运 非线性效应 intense ion beam accelerator warm dense matter high energy electron beam radiography energy deposition and transportation nonlinear effect 
强激光与粒子束
2021, 33(1): 012005
作者单位
摘要
1 北京理工大学 物理学院静电研究实验室,北京 100081
2 西北核技术研究所 强脉冲辐射环境模拟与效应国家重点实验室,西安 710024
脉冲电流驱动金属丝电爆炸可产生具有较高能量密度的等离子体,并伴随脉冲电磁辐射、强冲击波等效应,广泛应用于Z箍缩、电热化学**、油气助采等领域;与纯金属相比,合金具备电阻率高、成分可调、相变复杂等特点,在电爆炸效应参数的调控方面具有很大潜力。开展了大气空气介质中铜、镍、铜镍(康铜)丝在微秒时间尺度电脉冲作用下电爆炸实验研究,通过放电参数与自辐射图像诊断,获取电爆炸过程放电参数与时空演变的特性规律,得到脉冲电流作用下合金电爆炸在相变与等离子体方面的特征。实验发现,在电爆炸早期,铜镍合金的高电阻率能够提高能量沉积效率:铜52%、镍74%、铜镍合金78%;而相爆开始后,合金丝负载则更接近纯镍丝负载性能。等离子体通道早期膨胀速率在5 mm/μs量级,随后迅速衰减;合金丝等离子体膨胀时间更久,击穿后平均电阻率上升缓慢,且等离子体辐射与金属爆炸产物在空间尺度上存在关联性。特别地,铜镍合金气溶胶分层同时具有横向和纵向特征(特征尺度10−1 mm),但整体较铜气溶胶更为均匀。
金属丝电爆炸 温稠密等离子体 光辐射 等离子体诊断 二元合金 纳米材料制备 electrical wire explosion warm dense matter optical emission plasma diagnostics binary alloy nano-powder preparation 
强激光与粒子束
2021, 33(6): 065010
作者单位
摘要
国防科技大学 文理学院 物理系,长沙 410072
随着大型激光装置的建立和精密测量技术的发展,强激光与固体相互作用成为实验室产生温稠密物质的一个重要手段。温稠密物质的结构复杂性、瞬态性和非平衡性给理论建模和实验测量带来了巨大挑战。本文系统介绍了激光产生温稠密物质的实验手段和理论模拟方法方面的重要进展,分析了其中的电子激发动力学、电子-离子能量弛豫过程、离子动力学等物理过程,总结了温稠密物质状态诊断的实验技术和理论方法,并论述了激光产生温稠密物质的发展趋势。
温稠密物质 激光与物质相互作用 电子动力学 电子-离子能量弛豫 离子动力学 状态诊断 warm dense matter laser-matter interaction electronic dynamics electron-ion relaxation ionic dynamics state diagnosis 
强激光与粒子束
2020, 32(9): 092006
Author Affiliations
Abstract
1 Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
2 Institute of Physics of the ASCR, Na Slovance 1999/2, 182 21 Prague, Czech Republic
The study of structure, thermodynamic state, equation of state (EOS) and transport properties of warm dense matter (WDM) has become one of the key aspects of laboratory astrophysics. This field has demonstrated its importance not only concerning the internal structure of planets, but also other astrophysical bodies such as brown dwarfs, crusts of old stars or white dwarf stars. There has been a rapid increase in interest and activity in this field over the last two decades owing to many technological advances including not only the commissioning of high energy optical laser systems, z-pinches and X-ray free electron lasers, but also short-pulse laser facilities capable of generation of novel particle and X-ray sources. Many new diagnostic methods have been developed recently to study WDM in its full complexity. Even ultrafast nonequilibrium dynamics has been accessed for the first time thanks to subpicosecond laser pulses achieved at new facilities. Recent years saw a number of major discoveries with direct implications to astrophysics such as the formation of diamond at pressures relevant to interiors of frozen giant planets like Neptune, metallic hydrogen under conditions such as those found inside Jupiter’s dynamo or formation of lonsdaleite crystals under extreme pressures during asteroid impacts on celestial bodies. This paper provides a broad review of the most recent experimental work carried out in this field with a special focus on the methods used. All typical schemes used to produce WDM are discussed in detail. Most of the diagnostic techniques recently established to probe WDM are also described. This paper also provides an overview of the most prominent examples of these methods used in experiments. Even though the main emphasis of the publication is experimental work focused on laboratory astrophysics primarily at laser facilities, a brief outline of other methods such as dynamic compression with z-pinches and static compression using diamond anvil cells (DAC) is also included. Some relevant theoretical and computational efforts related to WDM and astrophysics are mentioned in this review.
high pressure phases laboratory astrophysics lasers planetary interiors plasma physics warm dense matter 
High Power Laser Science and Engineering
2018, 6(4): 04000e59
Author Affiliations
Abstract
1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 School of Science, Xi'an Jiaotong University, Xi'an 710049, China
4 Department of Engineering Physics, Tsinghua University, Beijing 100084, China
The research activities on warm dense matter driven by intense heavy ion beams at the new project High Intensity heavy-ion Accelerator Facility (HIAF) are presented. The ion beam parameters and the simulated accessible state of matter at HIAF are introduced, respectively. The progresses of the developed diagnostics for warm dense matter research including high energy electron radiography, multiple-channel pyrometer, in-situ energy loss and charge state of ion detector are briefly introduced.
Warm dense matter Intense heavy ion beams HIAF Electron radiography 
Matter and Radiation at Extremes
2018, 3(2): 85
Author Affiliations
Abstract
Department of Energy Sciences, Tokyo Institute of Technology, Nagatsuta 4259, Yokohama 226-8502, Japan
Research activities in Japan relevant to particle beam inertial fusion are briefly reviewed. These activities can be ascended to the 1980s.During the past three decades, significant progress in particle beam fusion, pulsed power systems, accelerator schemes for intense beams, targetphysics, and high-energy-density physics research has been made by a number of research groups at universities and accelerator facilities inJapan. High-flux ions have been extracted from laser ablation plasmas. Controllability of the ion velocity distribution in the plasma by an axialmagnetic and/or electric field has realized a stable high-flux low-emittance beam injector. Beam dynamics have been studied both theoreticallyand experimentally. The efforts have been concentrated on the beam behavior during the final compression stage of intense beam accelerators. Anovel accelerator scheme based on a repetitive induction modulator has been proposed as a cost-effective particle-beam driver scheme. Beamplasmainteraction and pulse-powered plasma experiments have been investigated as relevant studies of particle beam inertial fusion. Anirradiation method to mitigate the instability in imploding target has been proposed using oscillating heavy-ion beams. The new irradiationmethod has reopened the exploration of direct drive scheme of particle beam fusion.
Particle beam Inertial confinement fusion Pulse power Heavy ion Laser ion source Beam dynamics Final bunching Induction synchrotron High energy density Warm dense matter 
Matter and Radiation at Extremes
2018, 3(1): 12
Author Affiliations
Abstract
ELI-Beamlines, Institute of Physics, Academy of Sciences of the Czech Republic, 18221 Prague, Czech Republic
ELI-Beamlines (ELI-BL), one of the three pillars of the Extreme Light Infrastructure endeavour, will be in a unique position to perform research in high-energy-density-physics (HEDP), plasma physics and ultra-high intensity (UHI) (>1022W=cm2) laser-plasma interaction. Recently the need for HED laboratory physics was identified and the P3 (plasma physics platform) installation under construction in ELI-BL will be an answer. The ELI-BL 10 PW laser makes possible fundamental research topics from high-field physics to new extreme states of matter such as radiation-dominated ones, high-pressure quantum ones, warm dense matter (WDM) and ultra-relativistic plasmas. HEDP is of fundamental importance for research in the field of laboratory astrophysics and inertial confinement fusion (ICF). Reaching such extreme states of matter now and in the future will depend on the use of plasma optics for amplifying and focusing laser pulses. This article will present the relevant technological infrastructure being built in ELI-BL for HEDP and UHI, and gives a brief overview of some research under way in the field of UHI, laboratory astrophysics, ICF, WDM, and plasma optics.
High-energy-density-physics Ultra-high-intensity Warm dense matter Laboratory astrophysics High repetition rate lasers Plasma optics Inertial confinement fusion Laser-plasma interaction Relativistic plasmas 
Matter and Radiation at Extremes
2017, 2(4): 149
Author Affiliations
Abstract
1 FAIR GmbH: Facility for Antiproton and Ion Research in Europe GmbH, Planckstrae 1, 64291 Darmstadt, Germany
2 National Research Nuclear University MEPhI, Moscow, Russia National Research Nuclear University MEPhI, Kashirskoe shosse, 31, 115409 Moscow, Russia
3 Institut fu¨r Kernphysik, Technische Universit€at Darmstadt, Schlossgartenstrasse 9, 64289 Darmstadt, Germany
4 Institute of Modern Physics, CAS, Lanzhou 730000, PR China
5 State Scientific Center Russian Federation e Institute for Theoretical and Experimental Physics of National Research Center “Kurchatov Institute” (SSC RF ITEP of NRC “Kurchatov Institute”), FSBI SSC RF ITEP, Bolshaya Cheremushkinskaya, 25, 117218 Moscow, Russia
6 School of Science, Xi'an Jiaotong University and Institute of Modern Physics, CAS, Xianning West Road 28#, Xi'an 710049, PR China
We review the development of High Energy Density Physics (HEDP) with intense heavy ion beams as a tool to induce extreme states of matter. The development of this field connects intimately to the advances in accelerator physics and technology. We will cover the generation of intense heavy ion beams starting from the ion source and follow the acceleration process and transport to the target. Intensity limitations and potential solutions to overcome these limitations are discussed. This is exemplified by citing examples from existing machines at the Gesellschaft fur Schwerionenforschung (GSI-Darmstadt), the Institute of Theoretical and Experimental Physics in Moscow (ITEP-Moscow), and the Institute of Modern Physics (IMP-Lanzhou). Facilities under construction like the FAIR facility in Darmstadt and the High Intensity Accelerator Facility (HIAF), proposed for China will be included. Developments elsewhere are covered where it seems appropriate along with a report of recent results and achievements.
High energy density physics Ion driven fusion Warm dense matter 
Matter and Radiation at Extremes
2016, 1(1): 28
作者单位
摘要
中国工程物理研究院 流体物理研究所, 四川 绵阳 621900
基于能量平衡原理,结合SRIM统计方法,以铝靶为例,对重离子束和强电子束产生高温高密度物质所需的束流参数进行估计,分析各自产生温稠密物质的优缺点。结果显示,从电子辐射能损和束流利用观点来看,1~10 MeV电子束产生温稠密物质具有较好的均匀性和较高的利用率;而重离子束加载可以获得较宽区域的温稠密物质。
强电子束 重离子束 温稠密物质 蒙特卡罗方法 strong electron beams heavy ion beams warm dense matter Monte-Carlo method 
强激光与粒子束
2014, 26(3): 035102

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