arXiv: Plasma Physics最新文献_第3页

Numerical scheme for evaluating the collision integrals for triple interactions in relativistic plasma 计算相对论等离子体中三重相互作用碰撞积分的数值格式

arXiv: Plasma Physics Pub Date : 2020-10-27 DOI: 10.1063/5.0022931

M. Prakapenia, I. Siutsou, G. Vereshchagin

引用次数: 2

Reaching high laser intensity by a radiating electron 通过辐射电子达到高激光强度的

arXiv: Plasma Physics Pub Date : 2020-10-21 DOI: 10.1103/PhysRevA.103.053114

M. Jirka, P. Sasorov, S. Bulanov, G. Korn, B. Rus, S. V. Bulanov

引用次数: 2

Topology of the warm plasma dispersion relation at the second harmonic electron cyclotron resonance layer 二次谐波电子回旋共振层热等离子体色散关系的拓扑结构

arXiv: Plasma Physics Pub Date : 2020-10-16 DOI: 10.1063/5.0033880

P. L. Joostens, E. Westerhof

{"title":"Topology of the warm plasma dispersion relation at the second harmonic electron cyclotron resonance layer","authors":"P. L. Joostens, E. Westerhof","doi":"10.1063/5.0033880","DOIUrl":"https://doi.org/10.1063/5.0033880","url":null,"abstract":"The Warm Plasma Dispersion Relation, for waves in the electron cyclotron resonance range of frequencies, can be cast into the form of a bi-quadratic equation for $N_perp$, where the coefficients are a function of $N_perp^2$ and an iterative procedure is required to obtain a solution. However, this iterative procedure is not well understood and fails to converge towards a solution at the second harmonic resonance layer. In particular at higher densities where the wave can couple to an electron Bernstein wave. This paper focuses on a solution to the poor convergence of the iterative method, enabling determination of the topology of the dispersion relation around the second harmonic using a fully relativistic code for oblique waves. A feed-forward controller is proposed with the ability to adjust the rotation of a step of $N_perp^2$ within the complex plane, while also limiting the step-size. It is shown that implementation of the controller stabilizes unstable solutions, while improving overall robustness of the iteration. This allows the evaluation of the coupling between the fast extraordinary mode and electron Bernstein waves at the second harmonic electron cyclotron resonance layer, for non-perpendicularly propagating waves.","PeriodicalId":8461,"journal":{"name":"arXiv: Plasma Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83669567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non destructive testing of actively cooled plasma facing components by means of thermal transient excitation and infrared imaging. 热瞬态激发和红外成像技术在主动冷却等离子体表面构件无损检测中的应用。

arXiv: Plasma Physics Pub Date : 2020-10-06 DOI: 10.1016/B978-0-444-82762-3.50081-1

R. Mitteau, S. Berrebi, P. Chappuis, Ph. Darses, A. Dufayet, L. Garampon, D. Guilhem, M. Lipa, V. Martin, H. Roche

引用次数: 14

Over-critical sharp-gradient plasma slab produced by the collision of laser-induced blast-waves in a gas jet: Application to high-energy proton acceleration 气体射流中激光诱导爆炸波碰撞产生的过临界急梯度等离子体板:在高能质子加速中的应用

arXiv: Plasma Physics Pub Date : 2020-09-30 DOI: 10.1063/5.0031313

J. Marquès, P. Loiseau, J. Bonvalet, M. Tarisien, E. D'humieres, J. Domange, F. Hannachi, L. Lancia, O. Larroche, P. Nicolaï, P. Puyuelo-Valdes, L. Romagnani, J. Santos, V. Tikhonchuk

{"title":"Over-critical sharp-gradient plasma slab produced by the collision of laser-induced blast-waves in a gas jet: Application to high-energy proton acceleration","authors":"J. Marquès, P. Loiseau, J. Bonvalet, M. Tarisien, E. D'humieres, J. Domange, F. Hannachi, L. Lancia, O. Larroche, P. Nicolaï, P. Puyuelo-Valdes, L. Romagnani, J. Santos, V. Tikhonchuk","doi":"10.1063/5.0031313","DOIUrl":"https://doi.org/10.1063/5.0031313","url":null,"abstract":"The generation of thin and high density plasma slabs at high repetition rate is a key issue for ultra-high intensity laser applications. We present a scheme to create such plasma slabs, based on the propagation and collision in a gas jet of two counter-propagating blast waves (BW). Each BW is launched by a sudden and local heating induced by a nanosecond laser beam that propagates along the side of the jet. The resulting cylindrical BW expands perpendicular to the beam. The shock front, bent by the gas jet density gradient, pushes and compresses the plasma toward the jet center. By using two parallel ns laser beams, this scheme enables to tailor independently two opposite sides of the jet, while avoiding the damage risks associated with counterpropagating laser beams. A parametric study is performed using two and three dimensional hydrodynamic, as well as kinetic simulations. The BWs bending combined with the collision in a stagnation regime increases the density by more than 10 times and generates a very thin (down to few microns), near to over-critical plasma slab with a high density contrast (> 100), and a lifetime of a few hundred picoseconds. Two dimensional particle-in-cell simulations are used to study the influence of plasma tailoring on proton acceleration by a high-intensity sub-picosecond laser pulse. Tailoring the plasma not only at the entrance but also the exit side of the ps-pulse enhances the proton beam collimation, increases significantly the number of high energy protons, as well as their maximum energy.","PeriodicalId":8461,"journal":{"name":"arXiv: Plasma Physics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73587135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Effect of dynamic ions on band structure of plasmon excitations 动态离子对等离子激元能带结构的影响

arXiv: Plasma Physics Pub Date : 2020-09-17 DOI: 10.1063/5.0026298

M. Akbari-Moghanjoughi

{"title":"Effect of dynamic ions on band structure of plasmon excitations","authors":"M. Akbari-Moghanjoughi","doi":"10.1063/5.0026298","DOIUrl":"https://doi.org/10.1063/5.0026298","url":null,"abstract":"In this paper we develop a new method to study the plasmon energy band structure in multispecies plasmas. Using this method, we investigate plasmon dispersion band structure of different plasma systems with arbitrary degenerate electron fluid. The linearized Schrodinger-Poisson model is used to derive appropriate coupled pseudoforce system from which the energy dispersion structure is calculated. It is shown that the introduction of ion mobility, beyond the jellium (static ion) model with a wide plasmon energy band gap, can fundamentally modify the plasmon dispersion character leading to a new form of low-level energy band, due to the electron-ion band structure mixing. The effects ionic of charge state and chemical potential of the electron fluid on the plasmonic band structure indicate many new features and reveal the fundamental role played by ions in the phonon assisted plasmon excitations in the electron-ion plasma system. Moreover, our study reveals that ion charge screening has a significant impact on the plasmon excitations in ion containing plasmas. The energy band structure of pair plasmas confirm the unique role of ions on the plasmon excitations in many all plasma environments. Current research helps to better understand the underlying mechanisms of collective excitations in charged environment and the important role of heavy species on the elementary plasmon quasiparticles. The method developed in this research may also be extended for complex multispecies and magnetized quantum plasmas as well as to investigation the surface plasmon-polariton interactions in nanometallic structures.","PeriodicalId":8461,"journal":{"name":"arXiv: Plasma Physics","volume":"17 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91462767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Shear flow in a three-dimensional complex plasma in microgravity conditions 微重力条件下三维复杂等离子体的剪切流

arXiv: Plasma Physics Pub Date : 2020-09-14 DOI: 10.1103/PhysRevResearch.2.033404

V. Nosenko, M. Pustylnik, M. Rubin-Zuzic, A. Lipaev, A. Zobnin, A. Usachev, H. Thomas, M. Thoma, V. Fortov, O. Kononenko, A. Ovchinin

引用次数: 8

Symmetric ideal magnetofluidostatic equilibria with nonvanishing pressure gradients in asymmetric confinement vessels 非对称约束容器中压力梯度不消失的对称理想磁流平衡

arXiv: Plasma Physics Pub Date : 2020-09-11 DOI: 10.1063/5.0028155

N. Sato

引用次数: 1

CONTROL OF CHARACTERISTICS OF SELF-INJECTED AND ACCELERATED ELECTRON BUNCH IN PLASMA BY LASER PULSE SHAPING ON RADIUS, INTENSITY AND SHAPE 激光脉冲整形对等离子体中自注入和加速电子束半径、强度和形状特性的控制

arXiv: Plasma Physics Pub Date : 2020-09-09 DOI: 10.46813/2019-124-039

V. Maslov, D. Bondar, V. Grigorencko, I. Levchuk, I. Onishchenko

引用次数: 1

Increase of amplitude of accelerating wakefield excited by sequence of short relativistic electron bunches in plasma at magnetic field use 磁场作用下等离子体短相对论电子束序列激发加速尾流场振幅的增加

arXiv: Plasma Physics Pub Date : 2020-09-09 DOI: 10.26565/2312-4334-2017-2-02

D. Bondar, I. Levchuk, V. Maslov, I. Onishchenko

{"title":"Increase of amplitude of accelerating wakefield excited by sequence of short relativistic electron bunches in plasma at magnetic field use","authors":"D. Bondar, I. Levchuk, V. Maslov, I. Onishchenko","doi":"10.26565/2312-4334-2017-2-02","DOIUrl":"https://doi.org/10.26565/2312-4334-2017-2-02","url":null,"abstract":"Earlier, the authors found a mechanism for the sequence of short relativistic electron bunches, which leads to resonant excitation of the wakefield, even if the repetition frequency of bunches differs from the plasma frequency. In this case, the synchronization of frequencies is restored due to defocusing of the bunches which get into the bad phases with respect to the plasma wave. However, in this case, the bunches are lost, which as a result of this do not participate in the excitation of the wakefield. In this paper, numerical simulation was used to study the dynamics of electron bunches and the excitation of the wakefield in a magnetized plasma by a long sequence of short bunches of relativistic electrons. When a magnetic field is used, the defocussed bunches return to the region of interaction with the field after a certain time. In this case, the electrons of the bunches, returning to the necessary phases of the field, participate in the excitation of the wakefield. Also, the use of a magnetic field leads to an increase of the frequency of the excited wave relative to the repetition frequency of bunches. The latter increases the time for maintaining the resonance and, consequently, leads to an increase of the amplitude of the excited wakefield.","PeriodicalId":8461,"journal":{"name":"arXiv: Plasma Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88887928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0