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Suppression of Self-Excitation in a Plasma Microwave Amplifier with a Coaxial Geometry Using an Extended Microwave Absorber 利用扩展微波吸收器抑制同轴等离子体微波放大器的自激
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25603037
I. N. Kartashov, M. V. Kuzelev, A. V. Tumanov
{"title":"Suppression of Self-Excitation in a Plasma Microwave Amplifier with a Coaxial Geometry Using an Extended Microwave Absorber","authors":"I. N. Kartashov,&nbsp;M. V. Kuzelev,&nbsp;A. V. Tumanov","doi":"10.1134/S1063780X25603037","DOIUrl":"10.1134/S1063780X25603037","url":null,"abstract":"<p>The problem of radiation amplification in a plasma microwave amplifier with a coaxial geometry in the presence of an absorber is considered. The absorber is used to suppress the parasitic feedback, which can lead to self-excitation of the system. At the same time, its presence leads to a modification of its electrodynamic properties. The spatial increments of the beam–plasma instability were calculated, and the parameter ranges where the self-excitation of the amplifier does not occur were determined. The effect of the absorber on the efficiency of the transformation of the kinetic energy of electrons into the energy of microwave oscillations was estimated.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"708 - 715"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110602","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 Simulation of the Features of Propagation of Auroral Kilometric Radiation in Inhomogeneous Magnetoplasma 非均匀磁等离子体中极光千米辐射传播特性的实验模拟
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25602998
A. G. Galka, A. V. Kostrov, M. S. Malyshev
{"title":"Experimental Simulation of the Features of Propagation of Auroral Kilometric Radiation in Inhomogeneous Magnetoplasma","authors":"A. G. Galka,&nbsp;A. V. Kostrov,&nbsp;M. S. Malyshev","doi":"10.1134/S1063780X25602998","DOIUrl":"10.1134/S1063780X25602998","url":null,"abstract":"<p>The high-frequency wave propagation in homogeneous and inhomogeneous plasma at frequencies close to electron cyclotron resonance has been laboratory simulated. In the experiment, the electron cyclotron frequency is higher than the plasma frequency but lower than the radiation frequency, which corresponded to the conditions of the propagation of auroral kilometric radiation in the Earth’s magnetosphere recorded by high-orbit satellites at a large distance from the source region. The features of channeling of modes of magnetoplasma in an artificial magneto-oriented density duct with reduced density are studied. Experimental results show that plasma irregularities with transverse dimensions smaller than the wavelength in vacuum are effective channels for the transfer of fast waves along the magnetic field.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"716 - 724"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110598","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
Sputtering of Tungsten by Alpha Particles α粒子对钨的溅射
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25602871
V. S. Mikhailov, P. Yu. Babenko, A. N. Zinoviev
{"title":"Sputtering of Tungsten by Alpha Particles","authors":"V. S. Mikhailov,&nbsp;P. Yu. Babenko,&nbsp;A. N. Zinoviev","doi":"10.1134/S1063780X25602871","DOIUrl":"10.1134/S1063780X25602871","url":null,"abstract":"<p>Dependences of sputtering yield of tungsten on the energy of incident alpha particles were obtained in the energy range up to 10 MeV. An equation was proposed that describes the sputtering yield at energies above 100 keV. The results were obtained by numerical simulations using multiparticle potentials. For nuclear alpha particles with an energy of 3.5 MeV, a dependence of the sputtering yield on the incidence angle of the beam relative to the target was derived.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"685 - 688"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063780X25602871.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22
{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"732 - 739"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110600","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
Nonlinear Dynamics of Linearly Unstable n = 0 Electrostatic Perturbations in Conventional Tokamak Plasmas 传统托卡马克等离子体中线性不稳定n = 0静电扰动的非线性动力学
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25603013
E. A. Sorokina
{"title":"Nonlinear Dynamics of Linearly Unstable n = 0 Electrostatic Perturbations in Conventional Tokamak Plasmas","authors":"E. A. Sorokina","doi":"10.1134/S1063780X25603013","DOIUrl":"10.1134/S1063780X25603013","url":null,"abstract":"<p>The nonlinear dynamics of axisymmetric radially localized oscillations of the electric potential in a tokamak with stationary toroidal plasma rotation is studied. In the linear approximation, these oscillations split into two independent branches: geodesic acoustic modes (GAMs) and low-frequency zonal flows (ZFs). The stability of the latter is determined by the specifics of the plasma equilibrium, and the frequency/growth rate is determined by the stationary rotation velocity. It is shown that the nonlinear dynamics of the electric potential and the associated fluctuations of pressure, density, and velocity of the plasma along the magnetic field within the MHD model have integrals of motion. The evolution of the electric potential and hydrodynamic characteristics of the plasma is calculated for different velocities of stationary plasma rotation and different initial perturbations of the electric field. The regime the initial stage of which corresponds to a linearly unstable ZF is studied in detail. It is shown that, at the nonlinear stage, the potential fluctuations reach amplitude-limited oscillations of both low frequency and GAM. The resulting oscillation spectrum exhibits GAM frequency splitting and intermittency.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"665 - 684"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063780X25603013.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dusty Plasma Parameters in Saturn’s Magnetosphere 土星磁层中的尘埃等离子体参数
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25603001
D. V. Shokhrin, S. I. Kopnin, S. I. Popel
{"title":"Dusty Plasma Parameters in Saturn’s Magnetosphere","authors":"D. V. Shokhrin,&nbsp;S. I. Kopnin,&nbsp;S. I. Popel","doi":"10.1134/S1063780X25603001","DOIUrl":"10.1134/S1063780X25603001","url":null,"abstract":"<p>The dusty plasma parameters of Saturn’s magnetosphere at different distances from the planet have been considered. Particular attention is paid to the parameters in the vicinity of the satellite Enceladus. The influence of the photoelectric effect caused by the interaction of the dust component of the plasma of Saturn’s magnetosphere with solar radiation on its parameters is considered. Because of the photoelectric effect, situations are possible when dust particles can acquire a positive charge despite the significant distance from the Sun. Both cases are considered: positive and negative charge of dust particles. The conditions under which dust particles can have a positive charge are determined. The dusty plasma parameters of Saturn’s magnetosphere are determined depending on the character of charging of dust particles. A qualitative method for determining situations when dust particles have a positive or negative charge is proposed.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"732 - 739"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168945","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
Dusty Plasma in the Vicinity of an Active Asteroid 活跃小行星附近的尘埃等离子体
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25602858
A. Yu. Dubinskii, Yu. S. Reznichenko, A. P. Golub’, S. I. Popel
{"title":"Dusty Plasma in the Vicinity of an Active Asteroid","authors":"A. Yu. Dubinskii,&nbsp;Yu. S. Reznichenko,&nbsp;A. P. Golub’,&nbsp;S. I. Popel","doi":"10.1134/S1063780X25602858","DOIUrl":"10.1134/S1063780X25602858","url":null,"abstract":"<p>Plasma–dust processes in the vicinity of an active asteroid are analyzed. Distribution functions of photoelectrons, along with altitude dependences of charge, size, and concentration of dust particles, are determined based on the physico-mathematical model self-consistently describing concentrations of photoelectrons and dust particles above the illuminated part of an active asteroid. It is demonstrated that processes related to gas flow from the surface areas of the asteroid containing water represents an important factor that has an impact on formation of the plasma–dust system in the vicinity of an active asteroid. The gas flows make levitation of small particles impossible. On the other hand, it turns out that relatively large dust particles can be considered levitating above the asteroid surface.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"725 - 731"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110599","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
Probe Measurements in Experiments with Additional Working Gas Puffing into Frontal Region of Lower Hybrid Antenna of the FT-2 Tokamak FT-2托卡马克下混合天线额区附加工作气体充气实验中的探头测量
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X2560286X
S. V. Shatalin, M. V. Deryabina, A. B. Altukhov, E. Z. Gusakov, V. V. D’yachenko, L. A. Esipov, M. A. Irzak, A. N. Konovalov, S. I. Lashkul, A. Yu. Popov
{"title":"Probe Measurements in Experiments with Additional Working Gas Puffing into Frontal Region of Lower Hybrid Antenna of the FT-2 Tokamak","authors":"S. V. Shatalin,&nbsp;M. V. Deryabina,&nbsp;A. B. Altukhov,&nbsp;E. Z. Gusakov,&nbsp;V. V. D’yachenko,&nbsp;L. A. Esipov,&nbsp;M. A. Irzak,&nbsp;A. N. Konovalov,&nbsp;S. I. Lashkul,&nbsp;A. Yu. Popov","doi":"10.1134/S1063780X2560286X","DOIUrl":"10.1134/S1063780X2560286X","url":null,"abstract":"<p>In the experiments at the FT-2 tokamak, it was ascertained that the additional puffing of working gas into the region immediately adjacent to the launching antenna suppresses the development of parametric instability, which is considered to be the main obstacle to efficient penetration of the lower hybrid wave into the inner regions of the tokamak plasma. Using probe measurements, radial profiles of electron density and temperature in the scrape-off layer (SOL) were obtained, as well as their changes during the lower hybrid pulse were traced. It was shown that local gas puffing causes toroidal inhomogeneity of the edge plasma parameters. By means of performing direct measurements, the effect of plasma “forcing-out” from the frontal region of the radiating antenna under the action of ponderomotive force in the field of the introduced wave was detected. The effect of ponderomotive force on the edge plasma parameters and, as a consequence, on the antenna–plasma coupling efficiency should be taken into account in large-sized facilities at high powers.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"655 - 664"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110603","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
Numerical Simulation of Plasma Jet Expansion in a Laboratory Experiment 实验室实验中等离子体射流膨胀的数值模拟
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25602755
N. O. Savenko, E. M. Urvachev, T. V. Losseva, A. S. Grushin, Yu. V. Poklad, V. A. Gasilov
{"title":"Numerical Simulation of Plasma Jet Expansion in a Laboratory Experiment","authors":"N. O. Savenko,&nbsp;E. M. Urvachev,&nbsp;T. V. Losseva,&nbsp;A. S. Grushin,&nbsp;Yu. V. Poklad,&nbsp;V. A. Gasilov","doi":"10.1134/S1063780X25602755","DOIUrl":"10.1134/S1063780X25602755","url":null,"abstract":"<p>The results of numerical simulation of plasma jet expansion into a rarefied medium in a two-temperature gas dynamics model with separation of electron and ion temperatures are presented. The results obtained using two independent numerical methods are compared with the data of a laboratory experiment on jet injection into a vacuum chamber. It is shown that the ion and electron temperature of the main mass of the jet is in equilibrium. Estimates of the injection scenario are given taking into account the deformation of the generator nozzle.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"697 - 707"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110596","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
Rotation of Bulk Potential Waves in Cylindrical Waveguide with Partially Inhomogeneous Plasma Filling 部分非均匀等离子体填充圆柱波导中体势波的旋转
IF 1.1 4区 物理与天体物理
Plasma Physics Reports Pub Date : 2025-09-22 DOI: 10.1134/S1063780X25602937
N. A. Marusov
{"title":"Rotation of Bulk Potential Waves in Cylindrical Waveguide with Partially Inhomogeneous Plasma Filling","authors":"N. A. Marusov","doi":"10.1134/S1063780X25602937","DOIUrl":"10.1134/S1063780X25602937","url":null,"abstract":"<p>Propagation of bulk potential waves formed by superposition of helical harmonics with opposite azimuthal wavenumbers in a column of magnetized plasma is studied theoretically. The spectrum of bulk waves is calculated for a Gaussian density distribution. It is demonstrated that radial inhomogeneity of plasma in a metal waveguide with a vacuum gap at a certain frequency leads to a change in the direction of the bulk wave pattern rotation perpendicular to the waveguide axis.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 6","pages":"689 - 696"},"PeriodicalIF":1.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110597","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
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