搜索结果: 76-90 共查到“知识库 等离子体物理学”相关记录502条 . 查询时间(1.014 秒)
电喷雾萃取电离质谱技术及其应用进展
质谱 直接离子化技术 电喷雾萃取电离
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2013/8/20
电喷雾萃取电离(EESI)技术是近年发展起来的一种可以在无需样品预处理的条件下对复杂基体样品进行直接质谱分析的新兴离子化技术. 该技术能对液体、气溶胶、固体表面、黏性样品等不同形态样品进行分析. 本文介绍了EESI 技术的工作原理, 系统阐述了EESI-MS 技术在实际样品分析中的实现方式和技术特点, 对EESI-MS 现有的应用进行了简要的归纳和评述, 展望了EESI 技术在食品医药安全、公共安...
Microinstabilities at perpendicular collisionless shocks: A comparison of full particle simulations with different ion to electron mass ratio
Microinstabilities perpendicular collisionless shocks comparison of full particle simulations electron mass ratio Plasma Physics
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2012/4/24
A full particle simulation study is carried out for studying microinstabilities generated at the shock front of perpendicular collisionless shocks. The structure and dynamics of shock waves are determ...
Propagation of gamma rays and production of free electrons in air
Propagation of gamma rays production of free electrons Plasma Physics
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2012/4/20
A new concept of remote detection of concealed radioactive materials has been recently proposed \cite{Gr.Nusin.2010}-\cite{NusinSprangle}. It is based on the breakdown in air at the focal point of a h...
Long-wavelength limit of gyrokinetics in a turbulent tokamak and its intrinsic ambipolarity
Long-wavelength limit of gyrokinetics turbulent tokamak its intrinsic ambipolarity Plasma Physics
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2012/4/20
Recently, the electrostatic gyrokinetic Hamiltonian and change of coordinates have been computed to order $\epsilon^2$ in general magnetic geometry. Here $\epsilon$ is the gyrokinetic expansion parame...
Influence of realistic parameters on state-of-the-art LWFA experiments
Influence of realistic parameters state-of-the-art LWFA experiments Plasma Physics
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2012/4/19
We examine the influence of non-ideal plasma-density and non-Gaussian transverse laser-intensity profiles in the laser wakefield accelerator analytically and numerically. We find that the characterist...
Electro-diffusion in a plasma with two ion species
Electro-diffusion plasma two ion species Plasma Physics
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2012/4/20
Electric field is a thermodynamic force that can drive collisional inter-ion-species transport in a multicomponent plasma. In an inertial confinement fusion (ICF) capsule, such transport causes fuel i...
An exact solution of the moving boundary problem for the relativistic plasma expansion in a dipole magnetic field
exact solution of the moving boundary problem relativistic plasma expansion dipole magnetic field Plasma Physics
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2012/4/19
An exact analytic solution is obtained for a uniformly expanding, neutral, highly conducting plasma sphere in an external dipole magnetic field with an arbitrary orientation of the dipole moment in th...
Magnetic moment non-conservation in magnetohydrodynamic turbulence models
Magnetic moment non-conservation magnetohydrodynamic turbulence models Plasma Physics
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2012/4/19
The fundamental assumptions of the adiabatic theory do not apply in presence of sharp field gradients as well as in presence of well developed magnetohydrodynamic turbulence. For this reason in such c...
Generalised action-angle coordinates defined on island chains
Generalised action-angle coordinates island chains Plasma Physics
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2012/4/19
Straight-field-line coordinates are very useful for representing magnetic fields in toroidally confined plasmas, but fundamental problems arise regarding their definition in 3-D geometries because of ...
Uniqueness theorem for the non-local ionization source in glow discharge and hollow cathode
integro-differential operator the Fredholm 2-nd kind equation existence and uniqueness theorem nilpotency glow discharge
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2012/4/19
The paper is devoted to the proof of the uniqueness theorem for solution of the equation for the non-local ionization source in a glow discharge and a hollow cathode in general 3D geometry. The theore...
用激光诱导等离子体光谱法分析碳钢样品中碳元素的实验研究
光谱学 激光诱导等离子体光谱 定量分析 定标曲线 碳钢
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2012/3/31
激光诱导等离子体光谱法作为一种新兴的元素成份分析方法近年受到广泛关注，采用这种方法可以快速对物体进行元素成分的定量分析。在实验中用激光诱导等离子体光谱法（LIPS）来测量碳钢中的碳含量。将Nd:YAG激光器发射的激光聚焦到样品表面产生等离子体，选择等离子体发射光谱中的193.09nm碳谱线进行分析。得到固态碳钢样品的碳含量的定标曲线，检测限为460ppm。这个结果说明LIPS方法可以用于钢铁中元素...
利用激波风洞, 采用氦气驱动氩气, 在平衡接触面运行方式下得到高温气体,通过在低压段注入电离种子K2CO3粉末, 实现高温条件下导电流体的产生, 设计了超声速喷管及磁流体加速实验段, 采用大电容提供电能, 开展了超声速气流磁流体加速初步实验研究. 典型实验条件下, 当喷管入口总压为0.7049MPa、理论平衡温度为8372.8K, 喷管出口马赫数为1.5, 电容充电电压为400V, 磁感应强度为0...
光栅耦合的可集成表面等离子体激射装置
等离子体物理学 表面等离子体激元 光栅耦合 强局域化
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2014/3/21
为了能够更有效地调节和产生表面等离子体激元(Surface Plasmon Polaritons,SPPs)的激射,设计了一种光栅耦合的可集成SPPs激射装置,利用电子束激发和光栅耦合方式实现了SPPs在无源金属层中的传播和激射。分析了该装置SPPs传播的波矢特性,通过某一条件下激射条件和光照波长的分析得出了结构的一般特性。结果表明:基于光栅耦合结构的装置产生的SPPs激射具有显著的强局域特性,通...
从合成与性能方面概述了包括基于咪唑、吡唑、三唑、四唑、三嗪和四嗪类阴离子、硝基苯类阴离子和非芳香硝基有机阴离子的含能离子盐的研究进展。介绍了含能离子盐在推进剂及熔铸炸药用TNT替代物方面的研究进展。附参考文献101篇。
Heating mechanisms in radio frequency driven ultracold plasmas
Heating mechanisms radio frequency driven ultracold plasmas
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2012/2/28
Several mechanisms by which an external electromagnetic field influences the temperature of a plasma are studied analytically and specialized to the system of an ultracold plasma (UCP) driven by a uni...