Electromagnetic modes in cold magnetized strongly coupled plasmas
I. M. Tkachenko, J. Ortner, V. M. Rylyuk
给出了强耦合磁化全电离氢等离子体中电磁波传播的频谱，在忽略离子运动和阻尼的情况下，分析了库仑耦合对电磁波谱的影响。
The spectrum of electromagnetic waves propagating in a strongly coupled magnetized fully ionized hydrogen plasma is found. The ion motion and damping being neglected, the influence of the Coulomb coupling on the electromagnetic spectrum is analyzed.
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The three-wave coupling coefficients for a cold magnetized plasma
研究了均匀磁化等离子体中三波间的共振相互作用。本文利用一般理论的某些结果导出了冷磁化双组分等离子体耦合系数的显式表达式。
Viscoelastic modes in a strongly coupled cold magnetized dusty plasma
本文用广义流体动力学模型研究了强耦合、冷、磁化尘埃等离子体中的低频模。由于尘埃粒子之间的强相关性和由磁场赋予的张应力，这种等离子体表现出弹性特性。结果表明，在这种介质中存在纵向压缩阿尔芬模和弹性修正的横向剪切模。这些集体模式的特点建立和讨论。
Lower-hybrid oscillations in a cold magnetized electron-positron-ion plasma
本文得到了冷磁化电子-正电子-离子（e-p-i）等离子体中低混杂振荡/波的色散关系。结果表明，在等离子体密度较高且正电子和离子的平衡密度平衡的条件下，e-p-i等离子体中低混杂振荡的频率约为电子-离子（e-i）等离子体中低混杂振荡频率的$1/\sqrt{3}$倍。目前的工作可能有一些相关的实验室/天体物理e-p-i等离子体。
Topological Langmuir-Cyclotron Wave (TLCW) is a recently identified topological surface excitation in magnetized plasmas. We show that TLCW originates from the topological phase transition at the Langmuir wave-cyclotron wave resonance. By isofrequency surface analysis and 2D and 3D time-dependent simulations, we demonstrate that the TLCW can propagate robustly along complex phase transition interfaces in a unidirectional manner and without scattering. Because of these desirable features, the TLCW could be explored as an effective mechanism to drive current and flow in magnetized plasmas. The a…
Second harmonic electromagnetic emission of a turbulent magnetized plasma driven by a powerful electron beam
计算了强流电子束在磁化等离子体中激发强湍流时的二次谐波电磁辐射功率。结果表明，简单的分析模型的强等离子体湍流与假设的恒定的泵功率是能够解释实验观察到的电磁辐射作为单独的崩溃事件的后果的突发。计算结果表明，在湍流谱的长波部分发生的三波相互作用过程的电磁辐射功率与实验结果在数量级上一致。
Plasmas have been recently studied as topological materials. However, a comprehensive picture of topological phases and topological phase transitions in cold magnetized plasmas is still missing. Here we systematically map out all the topological phases and establish the bulk-edge correspondence in cold magnetized plasmas. We find that for the linear eigenmodes, there are 10 topological phases in the parameter space of density $n$, magnetic field $B$, and parallel wavenumber $k_{z}$, separated by the surfaces of Langmuir wave-L wave resonance, Langmuir wave-cyclotron wave resonance, and zero ma…
Nonlinear electromagnetic wave equations for superdense magnetized plasmas
利用量子流体力学和麦克斯韦方程组，导出了稠密量子磁等离子体的非线性电子-磁流体力学（MHD）、霍尔-MHD和尘埃霍尔-MHD方程。非线性方程包括电磁力、电子压力梯度、量子电子隧穿力和电子自旋力。它们可用于研究稠密磁等离子体中模式耦合过程引起的线性和非线性电磁波以及三维电磁波湍流谱等波动现象。
Stopping of Gyratory Fast Particle in Magnetized Cold Plasma
考虑了在均匀磁场存在下，旋转粒子在冷等离子体中的能量损失。能量损失率的分析和数值结果。这对于强场和弱场都是如此（即，例如，当电子回旋频率高于或小于等离子体频率时），以及当测试粒子速度大于电子热速度时。结果表明，能量损失率可能比在没有磁场的情况下通过等离子体的运动的情况下高得多。
Three-wave scattering in magnetized plasmas: from cold fluid to quantized Lagrangian
在磁化等离子体中，由外部泵浦或内部不稳定性产生的大振幅波可以通过三波相互作用散射。虽然三波散射在前向或后向几何中是众所周知的，但当波在磁化等离子体中相互成角度传播时会发生什么仍然是未知的，主要是由于这个问题的分析困难。在本文中，我们克服了这一分析困难，并找到了一个方便的公式冷，均匀，磁化等离子体中的三波耦合系数在最一般的几何形状。这是通过系统地解决流体麦克斯韦模型的二阶使用多尺度微扰展开。当我们将耦合系数的一般公式重新表示为量子化拉格朗日量的S矩阵元素时，它变得透明。利用量子化的拉格朗日量，可以绕过微扰解，直接由等离子体的线性响应得到非线性耦合系数。为了说明如何计算冷耦合系数，我们给出了一组参与波是准横向或准纵向的例子。在这些例子中，我们确定的三波散射的角度依赖性，并证明后向散射不一定是磁化等离子体中最强的散射通道，在unmgnetized等离子体中发生的情况相反。我们的方法给出了一个更完整的图片，超越简单的准直几何形状，注入波如何可以在磁约束设备中衰减，以及激光如何可以在磁化等离子体目标散射。
Propagation of electromagnetically generated wake fields in inhomogeneous magnetized plasmas
研究了在具有非均匀背景磁场和密度分布的等离子体中短脉冲电磁波产生尾流场的问题，导出了尾流场的波动方程。在具有尖锐不连续性的介质中计算透射和反射系数。特别注意的是集中在电磁场的纵向部分被放大的发射波的例子。此外，应注意，尾流场可以传播出等离子体，从而提供关于电子密度分布的信息。本文提出了一种由实测尾流场谱重建背景密度分布的方法，并给出了数值例子。
A scheme to generate magnetized relativistic plasmas in laboratory is proposed. It is based on interaction of ultra-high-intensity sub-picosecond laser pulses with few-micron thick foils or films. By means of Particle-In-Cell simulations it is shown that energetic electrons produced by the laser and evacuated at the rear of the target trigger an expansion of the target and builds up a strong azimuthal magnetic field. It is shown that in the expanding plasma sheath a ratio of the magnetic pressure and the electron rest-mass energy density exceeds unity whereas a the plasma pressure is lower tha…
The excitation of electrostatic waves in plasma by laser electromagnetic pulse is important as it provides a scheme by which the power from the laser electromagnetic (EM) field can be transferred into the plasma medium. The paper presents a fundamentally new ponderomotive pressure-driven mechanism of excitation of electrostatic waves in an overdense magnetized plasma by a finite laser pulse. Particle-in-cell (PIC) simulations using the EPOCH-4.17.10 framework have been utilized for the study of a finite laser pulse interacting with a magnetized overdense plasma medium. The external magnetic fi…
We present a new model for simulating the electromagnetic fluctuations with frequencies much lower than the ion cyclotron frequency in plasmas confined in general magnetic configurations. This novel model (termed as GK-E&B) employs nonlinear gyrokinetic equations formulated in terms of electromagnetic fields along with momentum balance equations for solving fields. It, thus, not only includes kinetic effects, such as wave-particle interaction and microscopic (ion Larmor radius scale) physics; but also is computationally more efficient than the conventional formulation described in terms of pot…
Elliptically polarized electromagnetic waves in a magnetized quantum electron-positron plasma with effects of exchange-correlation
研究了磁化电子-正电子对等离子体中椭圆极化电磁波的色散特性，研究了粒子色散与玻姆势、费米简并压力和交换关联力的关系.通过这些量子效应，确定了两种可能的非常波或X波模式，并对它们的传播特性进行了数值研究。结果表明，由于这些量子效应，上混合频率，截止频率和谐振频率不再是常数，而是色散的。结果表明，粒子色散和交换关联力对X波的长短波长（与费米德拜长度相比）具有不同的支配作用。本研究将有助于理解EP等离子体振荡的集体行为以及磁化密度EP对等离子体中非常波的传播。
Investigation of a parametric instability between ELF and VLF modes driven by antennas immersed in a cold, magnetized plasma
我们已经研究了一个VLF，ELF和组合ELF/VLF天线沉浸在冷，磁化等离子体使用一个完全动力学，三维粒子在细胞模拟代码称为大尺度等离子体（LSP）的行为。所有的天线被建模为磁偶极子（$ρ_{ant}=0$），并被分配一个有限大小的电流回路内的时变电流密度。VLF天线以大于较低混合频率（$ω_{LH}$）的频率（$ω_{VLF}$）以10安培驱动，而ELF天线以小于$ω_{LH}$的频率（$ω_{ELF}$）以3安培驱动。组合的ELF/VLF天线（我们称之为参量天线）包括在同一模拟域中同时驱动的两个天线。我们发现，参量天线非线性激发电磁（EM）哨声波在更大程度上比单独的甚低频天线。我们还表明，EM哨声波的参数激发导致更大的发射EM功率（以瓦特计）相比，单独的VLF天线。
Electromagnetic surface modes in a magnetized quantum electron-hole plasma
研究了表面电磁波沿均匀磁场在量子电子空穴半导体等离子体中的传播。利用量子隧穿效应发现了一种新的前向传播模式，这是以前没有报道过的。在经典极限（$\hbar\rightarrow 0$）的低频模式之一被发现类似于实验观察到的$n$型InSb在室温下。的表面模式被示出显着修改的情况下，高电导率的半导体等离子体中的电子和空穴可能会退化。讨论了外加磁场和量子隧穿效应对表面波模的影响。
In natural and laboratory magnetized plasmas, an equilibrium electric field may exist perpendicular to the background magnetic field. In such a situation all the plasma species experience a common drift and the unperturbed distribution functions have a common shift in velocity space. In this work the susceptibility tensor is first derived in the laboratory frame for such a situation using the commonly used method of integration along unperturbed trajectory. Then the Lorentz transformation method is adopted to verify the results. As an application we give an analysis of the waves propagating pa…
The kinetic damping mechanism of low frequency transverse perturbations propagating parallel to the magnetic field in a magnetized warm electron plasma is simulated by means of electromagnetic (EM) Vlasov simulations. The short-time-scale damping of the electron magnetohydrodynamic whistler perturbations and underlying physics of finite electron temperature effect on its real frequency are recovered rather deterministically, and analyzed. The damping arises from an interplay between a global (prevailing over entire phase-space) and the more familiar resonant-electron-specific kinetic damping m…
Nonlinear propagation of purely stationary large amplitude electromagnetic (EM) solitary waves in a magnetized electron-positron (EP) plasma is studied using a fully relativistic two-fluid hydrodynamic model which accounts for physical regimes of both weakly relativistic $(P\ll nmc^2)$ and ultrarelativistic $(P\gg nmc^2)$ random thermal energies. Here, $P$ is the thermal pressure, $n$ the number density and $m$ the mass of a particle, and $c$ is the speed of light in vacuum. Previous theory in the literature [Phys. Plasmas \textbf{11}, 3078 (2004)] is advanced and generalized by the relativist…
Kinetic analysis of spin current contribution to spectrum of electromagnetic waves in spin-1/2 plasma, Part I: Dielectric permeability tensor for magnetized plasmas
在六维相空间中，利用自旋1/2量子动力学模型导出了自旋极化等离子体的介电磁导率张量。分布函数和自旋分布函数的表达式推导出在线性近似的路径上的介电磁导率张量推导。由自旋极化简并电子气导出了介电磁导率张量。本文还讨论了在有限温度区的平衡分布函数，即自旋极化的费米-狄拉克分布。考虑自旋极化的平衡态打开的热自旋电流在等离子体动力学的贡献的动力学建模的可能性。
Nonlinear electrostatic oscillations in a cold magnetized electron-positron plasma
本文用解析法和模拟方法研究了冷磁化电子-正电子等离子体中非线性静电振荡的时空演化。使用微扰的方法，我们证明了非线性的解决方案显着改变时，纯静电模式被激发在线性水平，而不是一个混合的上混合和零频率模式，被认为是在最近的研究。纯静电振荡经历非线性相位混合。然而，磁场的存在下显着延迟相混合相比，在相应的未磁化等离子体中观察到的。使用1D PIC模拟，然后我们详细分析了纯振荡的主模式的阻尼，并推断相位混合时间对磁场和振荡幅度的依赖性。这一结果与上述混合上混合模的结果有很大的不同。利用电子-p等离子体的对称性，我们然后解释了我们的非线性解决方案的广义对称性。对称性使我们能够构建一个独特的非线性解决方案，不显示任何签名的相位混合，但结果在一个非线性波在上混合频率。我们的研究与实验室/天体物理e-p等离子体有关。
Propagation of finite amplitude electrostatic disturbances in an inhomogeneous magnetized plasma
本文用1D 2 V开边界Vlasov-Ampere程序详细研究了有限振幅电磁扰动在非均匀磁化等离子体中的传播。该代码被应用于研究传播的外部驱动的电磁信号，本地化在一个边界的集成间隔，通过一个给定的平衡等离子体配置与不均匀的等离子体密度和磁场。
Unstable electromagnetic modes in strongly magnetized plasmas
确定了强磁化等离子体中可能不稳定的电磁模。该制度的不稳定性可能会脱颖而出相比，非相干电子回旋辐射进行了探讨。这些模式与惯性约束聚变和伽马射线暴有关。
Harmonic generation in magnetized plasma for Electromagnetic wave propagating parallel to external magnetic field
本文利用PIC模拟研究磁化等离子体中平行于外磁场传播的电磁波谐波产生，发现线偏振入射波可激发奇次RCP和LCP谐波，且在电子回旋频率处最强，为产生高频圆偏振电磁波提供了理论依据。
We analyze the electromagnetic field of a small bunch that uniformly moves in a circular waveguide and transverses a boundary between an area filled up with cold magnetized electron plasma and a vacuum area. The magnetic field is supposed to be strong but finite so the perturbation technique can be applied. Two cases are studied in detail: the bunch is flying out of the plasma into a vacuum, and, inversely, the bunch is flying into the plasma out of the vacuum area of waveguide. The investigation of the waveguide mode components is performed analytically with methods of the complex variable fu…
Anomalous Diffusion at Edge and Core of a Magnetized Cold Plasma
本文阐述了弱湍流冷磁化等离子体反常扩散理论的进展。在文献中提出的几个模型进行了讨论。重点放在一个新提出的机制的基础上的耦合作用的导电壁（不包括电极）约束等离子体漏极电流（边缘扩散）与磁场通量“切割”的带电粒子在其轨道运动的跟踪区域的异常扩散传输机制。同样的推理适用于等离子体核心的异常扩散。所提出的机制预计是有效的制度时，等离子体扩散尺度玻姆扩散和高$B/N$，碰撞时是次要的。
A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons
本文提出并验证了一种用于自旋粒子模拟磁化等离子体中电磁波和不稳定性的守恒格式。由漂移动力学方程导出的电子连续性方程，通过由平行矢势计算的扰动机械流，将电子密度扰动时间推进，由扰动分布函数计算的扰动正则流，求解平行矢势。在回旋粒子模拟中，利用这种新格式恢复了无剪切平板中的剪切Alfvén波频散关系和剪切柱体中的连续阻尼。新方案克服了传统微扰模拟方法对垂直网格尺寸的严格要求，即对于长波长Alfvén波，垂直网格尺寸必须与电子无碰撞趋肤深度一样小.新方案还避免了传统方法中由扰动密度计算的静电势与由扰动正则流计算的矢量势不一致而产生非物理意义上的大平行电场的问题。最后，与流体模拟相比，剪切柱体中Alfvén波的回旋粒子模拟具有更好的数值特性，流体模拟遭受与奇异模式结构相关的数值困难。
Invariant imbedding theory of mode conversion in inhomogeneous plasmas. II. Mode conversion in cold, magnetized plasmas with perpendicular inhomogeneity
本文将非均匀介质中耦合波传播的不变量嵌入理论的一个新版本应用于冷、磁化和分层等离子体中高频电磁波到静电模的模式转换。考虑了外加磁场垂直于非均匀性方向且电子密度分布为线性的情况。得到了非均匀等离子体中模式转换系数、反射率以及波电场和波磁场分布的精确结果。详细研究了模式转换现象与外加磁场大小、入射角和波频率的关系。
In this paper, electromagnetic emissions produced by a beam-plasma system are investigated using particle-in-cell simulations for the particular case when the typical transverse size of both 100 keV electron beam and produced plasma channel is comparable to the radiation wavelength. The interest in this regime of beam-plasma interaction is associated with highly efficient generation of electromagnetic waves near the plasma frequency harmonics that has been recently observed in laboratory experiments on the GOL-3 mirror trap. It has been found that the radiation power only from the vicinity of …
Nonideal strongly magnetized plasmas of neutron stars and their electromagnetic radiation
本文研究了构成磁性中子星外层的非理想强磁化等离子体的状态方程、极化和辐射性质。对部分电离的氢大气和这些恒星的凝聚氢或铁表面进行了详细的计算。这是astro-ph/0511803的姊妹篇
On O-X mode conversion in a cold magnetized 2D inhomogeneous plasma in the electron cyclotron frequency range
本文导出了一组简化的偏微分波动方程，该方程适用于转换层靠近O模截止面的情况，并考虑了磁场的二维不均匀性，且不限制环向和磁场方向之间的夹角。给出了导出方程组的解的积分表示。对于O模截止面与X模截止面夹角较小的特殊情况，得到了电场分量和转换系数的显式表达式，并详细讨论了其性质。
One dimensional Particle-in-cell simulations using OSIRIS-4.0 has been conducted to study the interaction of a laser electromagnetic pulse with an overdense magnetized plasma target. The external magnetic field has been chosen to be directed along the laser propagation direction. This geometry supports the propagation of right (R) and left (L) circularly polarised electromagnetic waves in the plasma. The laser pulse is allowed to propagate inside the plasma when its frequency falls in the pass band of the dispersion curves of L and/or R waves. The strength of the applied external magnetic fiel…
Dispersion relation of an electromagnetic wave in unmagnetized cold plasma
电磁波在未磁化的中性等离子体中的色散关系为w^2=wp^2+（ck）^2。考虑到横向离子回复力的影响，提出了修正的色散关系。
Space Time Algebra Formulation of Cold Magnetized Plasmas
本文利用 Clifford 代数将冷多组分无损耗磁化等离子体的 Maxwell 方程表述为含场、极化和电流的 Dirac 型 Hermitian 演化方程，以支持无坐标、通用离散与量子计算实现。
Simulating the Injection of Magnetized Plasma without Electromagnetic Precursor Wave
注入磁化等离子体的磁化强度或注入速率的变化需要在模拟箱的边界处的时变磁场。简单的实现将导致电磁前兆波，可能会影响仿真结果。这个问题是众所周知的，例如在Lemebege和Dawson 1987中描述过。从那时起，很少有论文试图处理这个问题，没有标准的解决方案存在。在本研究报告中，我们建议Lemebege和Dawson 1987年论文中使用的ad-hoc脉冲形状可以用标准数字低通滤波器代替。该滤波器的截止频率应与磁化等离子体中的陀螺频率一致，以利用由回旋电子引起的（多普勒展宽）共振吸收。我们用一个代码例子说明了这个想法，并证明了这种方法的效率与我们的电磁粒子在细胞代码的样本模拟。
Observations of powerful radio waves from neutron star magnetospheres raise the question of how strong waves interact with particles in a strong background magnetic field $B_{bg}$. This problem is examined by solving the particle motion in the wave. Remarkably, waves with amplitudes $E_0>B_{bg}$ pump particle energy via repeating resonance events, quickly reaching the radiation reaction limit. As a result, the wave is scattered with a huge cross section. This fact has implications for models of fast radio bursts and magnetars. Particles accelerated in the wave emit gamma-rays, which can trigge…
Mildly relativistic shocks in magnetized electron-ion plasmas are investigated with 2D kinetic particle-in-cell simulations of unprecedentedly high resolution and large scale for conditions that may be found at internal shocks in blazar cores. Ion-scale effects cause corrugations along the shock surface whose properties somewhat depend on the configuration of the mean perpendicular magnetic field, that is either in or out of the simulation plane. We show that the synchrotron maser instability persists to operate in mildly relativistic shocks in agreement with theoretical predictions and produc…
In the present analysis we study the self consistent propagation of nonlinear electromagnetic pulses in a one dimensional relativistic electron-ion plasma, from the perspective of nonlinear dynamics. We show how a series of Hamiltonian bifurcations give rise to the electric fields which are of relevance in the subject of particle acceleration. Connections between these bifurcated solutions and results of earlier analysis are made.
Transparency of Magnetized Plasma at Cyclotron Frequency
如果电磁辐射的频率等于等离子体电子的回旋频率，则电磁辐射被磁化等离子体强烈吸收。它表明，吸收可以完全取消的存在下，第二辐射束，甚至一个波荡器的静磁场，导致在回旋频率的等离子体透明度。这种效应类似于三能级原子系统的电磁感应透明（EIT），只是它发生在完全{ \it经典}的等离子体中。此外，由于经典等离子体的复杂性，折射率在回旋频率不同于1。EIT在等离子体中的潜在应用包括选择性等离子体加热、折射率的电磁控制和电子/离子加速。
Non-Extensive Transport Equations in Magnetized Plasmas
本文首次介绍了一个完整的非广延统计碰撞输运自洽动力学模型，根据Tsallis熵推广了普通Maxwell-Boltmzann统计量。仅从这个熵的定义出发，我们推导出动力学模型，在强磁化等离子体中找到电子的解，并计算各自的输运系数，以设置封闭的流体方程。所得结果进一步应用于模拟空间等离子体中的热输运和磁约束等离子体中的冷脉冲现象。
Short wavelength electromagnetic propagation in magnetized quantum plasmas
研究了非相对论量子等离子体中等离子体波传播的量子电动力学（QED）短波长修正。导出了热多组分量子等离子体的一般色散关系。研究发现，通过简单地替换热速度和等离子体频率，任何波模的经典色散关系都可以被修改为包括量子和短波长QED效应。此外，色散关系已被修改，以包括强磁场的QED效应。结果表明，强磁场和短波长QED校正将在真空和其他非色散等离子体模式中引起色散。实验室和天体物理系统的应用进行了讨论。
Electromagnetic (EM) waves/disturbances are typically the best means to understand and analyze an ionized medium like plasma. However, the propagation of electromagnetic waves with frequency lower than the plasma frequency is prohibited by the freely moving charges of the plasma. In dense plasmas though the plasma frequency can be typically quite high, EM sources at such higher frequency are not easily available. It is, therefore, of interest to seek possibilities wherein a low frequency (lower than the plasma frequency) EM disturbance propagates inside a plasma. This is possible in the contex…
Wake field generation and nonlinear evolution in a magnetized electron-positron-ion plasma
研究了强磁化电子-正电子-离子等离子体中圆极化电磁波的非线性传播。推导了高频CPEM波与低频静电尾流场相互作用的耦合方程。据发现，产生的尾场依赖于离子物种的存在。尾流场的产生又导致电磁脉冲的减速和频率下转换。
Exchange effects in magnetized quantum plasmas
我们将包括库仑交换相互作用在内的多粒子量子流体力学应用于磁化量子等离子体。我们考虑了库仑交换作用影响下的一些波动现象。由于库仑交换作用对纵波和横纵波都有影响，我们着重研究了非等温磁化等离子体中的朗缪尔波、Trivelpiece-Gould波、离子声波、低频纵向离子声波和低频电磁波在$T_{e}\gg T_{i}$中的色散。数值模拟了不同类型波的频散特性。
Effects of quantum statistical pressure and exchange correlation on the low frequency electromagnetic waves in degenerate Fermi-Dirac pair-ion plasma
利用量子磁流体力学模型研究了量子电子-正电子-离子磁等离子体中低频、长波长的电磁波，即剪切阿尔芬波。在这个模型中，我们考虑了电子和正电子被磁化和简并，而离子被磁化和经典。我们还考虑了完全出现在电子和正电子动力学方程中的交换关联项的影响。整个处理过程采用多流体模型。我们的目的是研究剪切阿尔文波在上述等离子体系统中的传播。为此，我们导出了剪切Alfvén波的修正色散关系。结果与地球实验室天体物理学有关。
A fluid description for collisionless magnetized plasmas that takes into account the effect of cyclotron resonance has been developed. Following the same approach as the Landau fluid closure, the heat flux components associated with transverse electromagnetic fluctuations are approximated by a linear combination of lower-order moments in wavenumber space. The closure successfully reproduces the linear cyclotron resonance for electromagnetic waves propagating parallel to the ambient magnetic field. In the presence of finite temperature anisotropy, the model gives approximately correct predictio…
Relativistic magnetized shocks are a natural source of coherent emission, offering a plausible radiative mechanism for Fast Radio Bursts (FRBs). We present first-principles 3D simulations that provide essential information for the FRB models based on shocks: the emission efficiency, spectrum, and polarization. The simulated shock propagates in an $e^\pm$ plasma with magnetization $σ>1$. The measured fraction of shock energy converted to coherent radiation is $\simeq 10^{-3} \, σ^{-1}$, and the energy-carrying wavenumber of the wave spectrum is $\simeq 4 \,ω_{\rm c}/c$, where $ω_{\rm c}$ is the…
Proton deflectometry analysis in magnetized plasmas: magnetic field reconstruction in one dimension
本文提出一种从质子通量数据恢复一维电磁场的重建算法，研究源通量不确定性影响，利用边界条件约束通量分布，并实验展示混合网格-通量重建技术。
The heating of ions via lower hybrid waves has been observed in several astrophysical as well as laboratory plasmas. We have conducted Particle-In-Cell simulations to demonstrate absorption of the incident laser pulse at a chosen localized point in the target by manipulating the plasma density profile. We show that a part of the incident laser propagates inside plasma target, when its frequency lies below the lower hybrid resonance frequency. Thereafter, as it experiences a negative density gradient, it approaches the resonance point where its group velocity approaches zero. This is where the …
Nonreciprocal transport of electromagnetic waves within magnetized plasma is a powerful building block towards understanding and exploiting the properties of more general topological systems. Much recent attention has been paid to the theoretical issues of wave interaction within such a medium, but there is a lack of experimental verification that such systems can be viable in a lab or industrial setting. This work provides an experimental proof-of-concept by demonstrating nonreciprocity in a unit component, a microwave plasma circulator. We design an E-plane Y junction plasma circulator opera…
Here we develop a general theory of mode transformation (diffraction) at the flat transverse boundary between cold magnetized electron plasma and isotropic vacuum-like medium inside a circular waveguide. The obtained results can be also directly applied to the narrow-band Cherenkov radiation generated in plasma (or in isotropic medium) by a moving charged particle bunch.
Diffusion and Radiation in Magnetized Collisionless Plasmas with High-Frequency Small-Scale Turbulence
磁化的高能量密度等离子体通常会有很强的电磁涨落，其相关尺度小于电子的拉莫尔半径。在这样的等离子体中，来自电子的辐射与同步加速器和回旋加速器辐射明显不同，它们的能量和俯仰角扩散密切相关。在本文中，我们提出了一个全面的理论和数值研究的粒子在冷，“小尺度”朗缪尔和哨声模式湍流的传输及其关系的辐射光谱同时产生的这些粒子。我们强调，这种关系是一个极好的诊断工具的实验室，天体物理，行星际和太阳等离子体的平均磁场和强大的小尺度湍流。
The properties of obliquely propagating dissipative electron-acoustic solitary waves (OPdEASWs) have been investigated in a magnetized collisional superthermal plasma consisting of inertial cold electrons, inertialess hot electrons featuring kappa-distribution and static ions via the fluid dynamical approach. By using the reductive perturbation technique, a nonlinear Schamel equation that governs the nonlinear features of OPdEASWS is obtained. The solitary wave solution of the Schamel equation is used to examine the basic features of small, but finite amplitude OPdEASWs in such a magnetized co…
Relativistically-strong electromagnetic waves in magnetized plasmas
本文研究了在等离子体中沿磁场传播的相对论非线性电磁波的性质，探讨了超光速和次光速波的色散关系及非线性效应，揭示了次光速波在特定条件下无法传播的机制。
Radiative corrections to the Coulomb law and model of dense quantum plasmas: Dispersion of waves in magnetized quantum plasmas
考虑了对电磁相互作用的两种量子电动力学辐射修正及其对高密度量子等离子体性质的影响。考虑了库仑相互作用的线性辐射修正。它的贡献的朗缪尔波的频谱。第二类辐射修正与强电磁场下麦克斯韦方程组的非线性有关。简要讨论了它对磁化等离子体横波谱的贡献。在考虑朗缪尔波谱时，我们考虑了自旋向上和自旋向下的电子的不同分布的影响，揭示了费米压力的变化。
Quantum Computing Perspective for Electromagnetic Wave Propagation in Cold Magnetized Plasmas
该研究针对经典麦克斯韦方程组离散方法不适用于量子计算的问题，构建了冷磁化等离子体中麦克斯韦方程组的量子薛定谔表示，开发了量子比特晶格算法（QLA），并通过经典模拟验证了其有效性。
Electromagnetic radiation by turbulent, magnetized and randomly inhomogeneous solar radio sources generated by electron beams
本研究通过三种独立方法证明，III型太阳射电爆发中仅不到10%的电磁能量以O和X模式逃逸，大部分以Z模式辐射于源附近，为PSP和Solar Orbiter观测提供支持。
Photon Accelerator in Magnetized Electron-Ion Plasma
研究强磁场环境下等离子体中光子加速机制，揭示磁场对电磁波频率增益的增强效应
Filamentation instability in a quantum magnetized plasma
利用冷量子磁流体力学模型研究了非相对论电子束通过量子磁化等离子体时产生的偏转不稳定性。证明了当且仅当存在有限磁场时，量子效应可以完全抑制不稳定性。一个无量纲的参数被确定的措施的强度的量子效应。强量子效应允许比经典状态小得多的磁场来抑制不稳定性。
Oblique propagation of arbitrary amplitude electron acoustic solitary waves in magnetized kappa-distributed plasmas
本文研究了磁化等离子体中大振幅电子声波的线性和非线性性质。热电子被假定为在一个非麦克斯韦状态，其特征在于过量的超热粒子，在这里模拟的卡帕型长尾分布函数。波被假定为斜向传播到周围的磁场。两种类型的静电模式存在于线性政权，并简要分析了它们的属性。非线性赝势型分析揭示了大振幅静电孤波的存在，并允许调查其传播特性和存在域，在孤子速度（马赫数）。研究了等离子体的关键结构参数，即超热指数和冷电子密度对孤子特性和孤子存在域的影响。讨论了磁场强度和磁场的作用。
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