Plasma Physics Reports最新文献_第3页

Five-Period Quasi-Isodynamics Stellarator Configurations with a High β 具有高β的五周期准等动力学仿星器构型

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26600398

R. A. Khanaeva, M. I. Mikhailov, D. G. Vasilkov

{"title":"Five-Period Quasi-Isodynamics Stellarator Configurations with a High β","authors":"R. A. Khanaeva, M. I. Mikhailov, D. G. Vasilkov","doi":"10.1134/S1063780X26600398","DOIUrl":"10.1134/S1063780X26600398","url":null,"abstract":"Quasi-isodynamic stellarators (stellarators with a poloidal direction of the lines of the absolute value of the magnetic field B = const at the magnetic surfaces, where the centers of the “banana” trajectories of all trapped particles move over the magnetic surfaces) have many advantageous characteristics, such as good collisionless fast particle confinement, small neoclassical transport coefficients, and a bootstrap current that tends to zero. The limiting plasma pressure in quasi-isodynamic stellarators with a simple period structure decreases with decreasing number of periods. The implementation of compact quasi-isodynamic stellarators with high plasma pressure requires a significant decrease in the secondary dipole current (the Pfirsch–Schlüter current). Earlier, six-period quasi-isodynamic configurations were described, with a complex period structure, a significantly decreased dipole current, and a high limiting plasma pressure relative to the magnetic field pressure (〈β〉 ≈ 0.2). The aspect ratio A in these configurations was approximately 30. In stellarators of this type, the limiting plasma pressure shouldn’t decrease with decreasing number of periods. In this work, results are presented of the boundary optimization of a five-period quasi-isodynamic stellarator with a complicated period structure with 〈β〉 ≈ 0.2 and an aspect ratio А ≈ 23.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"52 8","pages":"951 - 963"},"PeriodicalIF":1.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Studies of the Dynamics and Structure of Plasma Flows in a Plasma Focus Discharge 等离子体聚焦放电中等离子体流动动力学和结构的实验研究

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X2660132X

V. I. Krauz, M. A. Medvedev, A. M. Kharrasov, V. V. Myalton, K. N. Mitrofanov, M. S. Rosya, P. A. Yudin, Yu. V. Vinogradova

引用次数: 0

Active Geophysical Experiment in an Aqueous Medium 含水介质中的主动地球物理实验

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26601082

E. M. Urvachev, T. V. Losseva, A. Yu. Mikulin, A. N. Lyakhov

引用次数: 0

LAQO Code for Calculation of Electron Cyclotron Plasma Heating and Current Drive in Tokamaks 托卡马克中电子回旋加速器等离子体加热和电流驱动计算的LAQO代码

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26601033

A. A. Balakin, E. D. Gospodchikov, P. A. Chuvakin, A. G. Shalashov

引用次数: 0

Quasilinear Development and Mutual Influence of Langmuir and Weibel Turbulence in Plasma with an Electron Beam 电子束等离子体中Langmuir和Weibel湍流的拟线性发展及其相互影响

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26601008

A. A. Kuznetsov, Vl. V. Kocharovsky

{"title":"Quasilinear Development and Mutual Influence of Langmuir and Weibel Turbulence in Plasma with an Electron Beam","authors":"A. A. Kuznetsov, Vl. V. Kocharovsky","doi":"10.1134/S1063780X26601008","DOIUrl":"10.1134/S1063780X26601008","url":null,"abstract":"In order to analyze the joint development of two-stream (Langmuir) and filamentation (Weibel) kinetic instabilities in plasma with an electron beam, a quasi-linear approach has been developed that takes into account the integral nonlinear interaction of spatial modes (harmonics) caused by a change in the spatially averaged particle velocity distribution function. On this basis, within the framework of the initial two-dimensional problem for a number of plasma and beam parameters, a numerical study of the evolution of the spectra of Langmuir (plasma) and Weibel (magnetic) turbulence was carried out. It has been established that developing turbulence of the magnetic field can significantly deform the region of electron velocity distribution resonant with Langmuir waves, strongly influencing the formation and especially the attenuation of these waves. Electric field turbulence, in turn, is capable of significantly isotropizing the distribution of electron velocities and thereby changing the increments, the nature of evolution, and the saturation level of filamentary harmonics of electric current. The characteristic properties of the joint dynamics of the spectra of magnetic and electric fields are found, the features of saturation and attenuation of both turbulent fields are established, and the necessary conditions for their mutual influence are discussed.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"52 8","pages":"980 - 992"},"PeriodicalIF":1.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Voltage Nanosecond Discharge: Dynamics of the Initial-Stage Breakdown in a Highly Inhomogeneous Electric Field 高压纳秒放电：高度不均匀电场中初始击穿的动力学

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26601203

M. I. Lomaev, D. V. Beloplotov, D. S. Pechenitsyn, D. A. Sorokin

引用次数: 0

Modeling of Plasma-Chemical Processes in a Mixture CO2 : N2 : H2O when Excited by a Pulsed Discharge 脉冲放电激发CO2: N2: H2O混合物中等离子体化学过程的建模

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X25604559

Yu. S. Akishev, N. A. Dyatko, I. V. Kochetov, A. V. Petryakov, Tao Shao, Cheng Zhang, Shuai Zhang

{"title":"Modeling of Plasma-Chemical Processes in a Mixture CO2 : N2 : H2O when Excited by a Pulsed Discharge","authors":"Yu. S. Akishev, N. A. Dyatko, I. V. Kochetov, A. V. Petryakov, Tao Shao, Cheng Zhang, Shuai Zhang","doi":"10.1134/S1063780X25604559","DOIUrl":"10.1134/S1063780X25604559","url":null,"abstract":"A computational and theoretical study of the production of various chemical compounds in a mixture of CO2 : N2 : H2O = 5 : 5 : 0.3 has been carried out at atmospheric pressure when exposed to an electric discharge current with a pulse duration of 2.5 μs. Two options for discharge formation are considered: a pulsed discharge with a constant current amplitude and a discharge with an LC circuit. For a discharge with a constant current amplitude, calculations have been performed in two approximations: constant pressure and constant gas temperature. In the discharge with an LC circuit, calculations have been carried out for the case of constant pressure. The dynamics of concentrations of various components has been analyzed both at the discharge pulse stage and at the afterglow stage (up to 10 s). According to the calculations, at the discharge stage, the main processes are the excitation and dissociation of molecules by electron impact. At this stage, O, H, N, and C atoms, CO molecules, and OH radicals are formed. At a subsequent stage, more complex stable molecules are formed as a result of various chemical reactions. It is shown that the concentrations of CO, O2, H2, NO, and N2O are weakly dependent on the approximation used, while the concentrations of products such as HNO2, HNO3, and NH3 turn out to be significantly lower than in the case of constant temperature in the case of constant pressure. Calculations have shown that under the conditions considered, the main positive and negative ions in the discharge plasma are hydrated ions. It has been also established that the exclusion of ion hydration processes leads to a decrease in the magnitude of the reduced electric field and an increase in the gas temperature at the quasi-stationary stage of discharge combustion.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"52 8","pages":"1070 - 1080"},"PeriodicalIF":1.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electron–Ion Plasma as a Model Thermoelectric Medium 电子-离子等离子体作为模型热电介质

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26600921

V. M. Grabov, E. V. Demidov, V. A. Komarov

引用次数: 0

On the Possibility of Formation of a Plasma-Dust Layer above the Surface of Enceladus, a Satellite of Saturn 关于土星卫星土卫二表面上等离子尘埃层形成的可能性

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26600982

S. I. Kopnin, Yu. N. Izvekova, D. V. Shokhrin, S. I. Popel

{"title":"On the Possibility of Formation of a Plasma-Dust Layer above the Surface of Enceladus, a Satellite of Saturn","authors":"S. I. Kopnin, Yu. N. Izvekova, D. V. Shokhrin, S. I. Popel","doi":"10.1134/S1063780X26600982","DOIUrl":"10.1134/S1063780X26600982","url":null,"abstract":"The dusty plasma above the surface of Enceladus, a satellite of Saturn, has been examined. A model for charging the surface of Enceladus as a result of its interaction with the surrounding plasma of Saturn’s magnetosphere, taking into account its characteristic parameters, namely, two types of ions: protons and ions of the so-called “water group” (e.g., O+, OH+, H2O+, H3O+, and N+ with an average atomic mass of about 16 amu); two types of electrons (“cold” and “hot” with corresponding different temperatures); as well as the influence of the photoelectric effect on the surface of Enceladus, and taking into account the reverse current of photoelectrons, has been developed. Within the framework of the proposed model, the surface charge of Enceladus, the characteristic profile of the electric field depending on the height above this surface, as well as the characteristic sizes of dust particles and the corresponding heights to which these particles are capable of rising as a result of the action of electrostatic repulsion forces from the charged surface of Enceladus have been determined.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"52 8","pages":"1021 - 1029"},"PeriodicalIF":1.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Plasma Parameters on Dust-Ion Acoustic Solitary Structures in Collisionless Unmagnetized Plasmas with Nonthermal Electrons and Positrons 等离子体参数对非热电子和正电子无碰撞非磁化等离子体中尘埃离子声孤立结构的影响

IF 1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2026-09-14 DOI: 10.1134/S1063780X26600775

P. Halder

{"title":"Effects of Plasma Parameters on Dust-Ion Acoustic Solitary Structures in Collisionless Unmagnetized Plasmas with Nonthermal Electrons and Positrons","authors":"P. Halder","doi":"10.1134/S1063780X26600775","DOIUrl":"10.1134/S1063780X26600775","url":null,"abstract":"The Sagdeev pseudo-potential approach is utilized to study the propagation of arbitrary-amplitude dust-ion acoustic (DIA) nonlinear structures in a collisionless four-component unmagnetized plasma. The plasma model consists of warm adiabatic ions, nonthermal positrons, nonthermal electrons, and immobile negatively charged dust grains. The Sagdeev potential analysis confirms the existence of positive-potential solitary waves (PPSWs), positive-potential supersolitons (PPSSs), and positive-potential double layers (PPDLs). In contrast, negative-potential supersolitons (NPSSs) are not supported by the system, whereas negative-potential solitary waves (NPSWs) and negative-potential double layers (NPDLs) are found to exist. The coexistence of PPSWs and NPSWs is also demonstrated. To provide physical insight into the formation of these nonlinear structures, phase-space portraits of the associated dynamical system are constructed. The phase portraits provide a good illustration of how PPSWs are modified both before and after a PPDL is formed. The influence of key plasma parameters on the amplitudes of PPSWs, NPSWs, PPSSs, and on the coexistence region of PPSWs and NPSWs is systematically examined. A critical positron to electron number density (n_{pc}^c) is identified, such that the amplitude of PPSWs decreases for ({n_{pc}} leqslant n_{pc}^c) and increases for ({n_{pc}} geqslant n_{pc}^c), with all other plasma parameters held fixed within the PPSW existence domain.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"52 8","pages":"1054 - 1069"},"PeriodicalIF":1.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0