Plasma Physics Reports最新文献_第5页

Selection of Dust Particles in Radio Frequency Inductive Discharge 射频感应放电中尘埃粒子的选择

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-22 DOI: 10.1134/S1063780X24600749

L. A. Novikov, M. A. Gasilov, M. S. Golubev, M. B. Morozova, E. S. Dzlieva, S. I. Pavlov, V. Yu. Karasev

{"title":"Selection of Dust Particles in Radio Frequency Inductive Discharge","authors":"L. A. Novikov, M. A. Gasilov, M. S. Golubev, M. B. Morozova, E. S. Dzlieva, S. I. Pavlov, V. Yu. Karasev","doi":"10.1134/S1063780X24600749","DOIUrl":"10.1134/S1063780X24600749","url":null,"abstract":"Selection of dust particles in three-dimensional plasma–dust trap in the electrodeless radio frequency inductive discharge in neon was studied for the first time. The discharge conditions and the discharge chamber design were chosen so that the dust structures of polydisperse quartz particles are created in the resulting dust trap. The structure lengths were of up to 1.5 cm and the number of particles in them was of up to 4000. Statistical analysis of the sizes of trapped particles has shown that under the conditions chosen the average particle size is close to 4 μm, and in a wide range from 0.25 to 1.0 Torr, it weakly depends on neon pressure. It was found that in the three-dimensional dust structure formed, the longitudinal interparticle distance changes in anomalously wide range, as compared to the dust structures formed in plasma of glow discharge. The characteristic size of the trapped particles was estimated based on the vertical balance of forces acting on dust particle. It was shown that, in terms of a number of parameters, the method of particle selection in radio frequency inductive discharge is preferable, as compared to similar method used in glow discharges in strata, and the dust trap applied can be used for studying three-dimensional dusty plasmas in the magnetic field.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 8","pages":"974 - 980"},"PeriodicalIF":0.9,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413078","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

On the Characteristics of Electron Diffusion and Drift in Inert Gases 论惰性气体中电子扩散和漂移的特征

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-22 DOI: 10.1134/S1063780X24601263

S. A. Maiorov, R. I. Golyatina, S. K. Kodanova, T. S. Ramazanov

{"title":"On the Characteristics of Electron Diffusion and Drift in Inert Gases","authors":"S. A. Maiorov, R. I. Golyatina, S. K. Kodanova, T. S. Ramazanov","doi":"10.1134/S1063780X24601263","DOIUrl":"10.1134/S1063780X24601263","url":null,"abstract":"The problem of calculating kinetic characteristics during electron drift in inert gases in a wide range of the reduced electric field strength: 0.001 Td < E/N < 10 000 Td is considered. For the case of a weak field E/N < 0.01 Td, there is little reference data, and the drift velocity, average energy, longitudinal and transverse diffusion coefficients and ionization coefficient for the cases of a weak field and a moderately strong field E/N < 100 Td were calculated using the method of dynamics of many particles involving collisions in accordance with the Monte Carlo procedure. For the cases of strong and superstrong fields 100 Td < E/N < 10 000 Td, the results of calculations for two models of electron departure from the system were considered and analyzed for the first time: (1) an avalanche model with multiplication; (2) a model with the most energetic electron in the system leaving the wall during the act of ionization or transition to the escape mode. Taking into account the appearance of new electrons in the system during ionization events under stationary current conditions made it possible to include the departure of electrons from the system to the wall with the determination of its potential into the consideration and, by analogy with the ionization coefficient, to introduce the definition of the electron runaway coefficient. For these two models, tabulated values of the electron runaway coefficient were obtained. An analysis and comparison of the calculation results with the table data was carried out. In addition, we present analytical approximations of the elastic and inelastic cross sections of electron–atom collisions depending on the collision energy that we obtained based on an analysis of the available theoretical and experimental data. They have physically reasonable asymptotics and can be recommended by us for widespread use.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 8","pages":"1029 - 1041"},"PeriodicalIF":0.9,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413217","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 Modeling of Plasma Dynamics and Neutron Generation in Z-pinch at the ANGARA-5-1 Facility ANGARA-5-1 设施 Z-pinch 中等离子体动力学和中子生成的数值建模

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-22 DOI: 10.1134/S1063780X24601007

S. F. Garanin, V. Yu. Dolinskii

{"title":"Numerical Modeling of Plasma Dynamics and Neutron Generation in Z-pinch at the ANGARA-5-1 Facility","authors":"S. F. Garanin, V. Yu. Dolinskii","doi":"10.1134/S1063780X24601007","DOIUrl":"10.1134/S1063780X24601007","url":null,"abstract":"Deuterium Z-pinch experimental studies [1] were carried out at the Angara-5-1 facility at a current of 2–2.5 MA with 100 ns rise time. Neutron yield in experiments ranged from 5 × 1010 to 8 × 1011 neutrons per pulse. In order to explain experimental results, the two-dimensional MHD calculations were performed taking into account the generation of DD-neutrons using thermonuclear and beam-target mechanisms. MHD calculations of pinch dynamics, carried out taking into account the deuterium density distribution in the gas puff, satisfactory agree with voltage measurements. The neutron yield in the calculations ranges from 4 × 1010 to 1.5 × 1011 depending on the deuterium density and the time delay between the start of gas puff and the moment of generator start-up. The energy of accelerated deuterons, which lead to neutron generation in the beam-target mechanism, is calculated to be from 55 to 900 keV, which is in satisfactory agreement with the estimates obtained [1]. An important difference between neutron generation in a fast gas Z-pinch and neutron generation in a dense plasma focus is that the contributions of thermonuclear and beam-target mechanisms to neutron generation in a fast gas Z-pinch are comparable, whereas in a dense plasma focus the main neutron generation mechanism is the beam-target mechanism.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 8","pages":"948 - 963"},"PeriodicalIF":0.9,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413220","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

On the Processes of Charging the Wall of a Discharge Tube under External Illumination 论放电管壁在外部照射下的充电过程

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-22 DOI: 10.1134/S1063780X24601147

A. V. Meshchanov, Yu. Z. Ionikh

引用次数: 0

Wigner Function Method for Describing Electromagnetic Field in Plasma-Like Media with Spatial Dispersion and Resonant Dissipation 用维格纳函数法描述具有空间弥散和共振耗散的类等离子体介质中的电磁场

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-22 DOI: 10.1134/S1063780X24601123

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

{"title":"Wigner Function Method for Describing Electromagnetic Field in Plasma-Like Media with Spatial Dispersion and Resonant Dissipation","authors":"E. D. Gospodchikov, A. A. Balakin, A. G. Shalashov","doi":"10.1134/S1063780X24601123","DOIUrl":"10.1134/S1063780X24601123","url":null,"abstract":"The paper gives a systematic presentation of the Wigner function method (Weyl formalism) for modeling the propagation and absorption of electromagnetic waves in anisotropic and gyrotropic dissipative media with spatial dispersion. A general kinetic equation for the Wigner function (tensor) is formulated, and its asymptotic expansion up to the second order for smoothly inhomogeneous and weakly dissipative media is constructed. As a result, a modification of the method of the kinetic equation for rays is proposed, based on the stochastic description of rays, making it possible to increase the accuracy of numerical modeling of wave problems with strong transverse inhomogeneity of the absorption coefficient without increasing the amount of calculations. The technique developed can be used to describe the propagation, absorption, and scattering of electron-cyclotron waves in high-temperature plasma of magnetic traps for controlled fusion in cases where standard modeling methods do not provide the necessary accuracy.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 8","pages":"931 - 947"},"PeriodicalIF":0.9,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063780X24601123.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413221","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

Effects of a Monoenergetic Electron Beam on the Plasma Sheath in the Presence of Secondary Electron Emission 存在二次电子发射时单能电子束对等离子体鞘的影响

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-19 DOI: 10.1134/S1063780X24600506

X. Y. Zhao

{"title":"Effects of a Monoenergetic Electron Beam on the Plasma Sheath in the Presence of Secondary Electron Emission","authors":"X. Y. Zhao","doi":"10.1134/S1063780X24600506","DOIUrl":"10.1134/S1063780X24600506","url":null,"abstract":"The properties of a plasma sheath are investigated numerically by using a fluid model in which a monoenergetic electron beam is taken into account. To suit the realistic environment, secondary electrons emitted from the wall surface due to collision between the electrons and the wall surface is considered. The result reveals that the effective emission coefficient depends on the emission generated by a monoenergetic electron beam when the temperature of a monoenergetic electron beam is high. The effective emission coefficient of secondary electrons changes monotonically with the increase of emission coefficient generated by beam electrons. Using the Sagdeev pseudopotential method, a modified Bohm criterion can be obtained. It is found that the ion Bohm velocity increases with increasing beam electron energy and emission coefficient generated by a monoenergetic electron beam. Moreover, when the emission coefficient generated by a monoenergetic electron beam is small, the wall potential decreases with increasing beam electron energy and concentration. When the emission coefficient generated by a monoenergetic electron beam is large, the opposite is true. It is also shown that a monoenergetic electron beam can cause an increase in the critical effective secondary electron emission coefficient, and the increase is nonmonotonic.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 10","pages":"1305 - 1312"},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257468","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

Effect of Shear Flow on the Double Tearing Mode Induced by Resonant Magnetic Perturbation 剪切流对共振磁扰动诱导的双撕裂模式的影响

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-19 DOI: 10.1134/S1063780X24601706

L. Wang, Y. Wang, H. Xu, W. Sun, Ch. Liu, K. Xia, W. Gao, L. Wang

引用次数: 0

Numerical Simulation of the Asymmetrical Supernova Scenarios in the Presence of an Equatorial Disk 赤道盘存在时的非对称超新星情景的数值模拟

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-05 DOI: 10.1134/S1063780X24600658

E. M. Urvachev

引用次数: 0

Ion-Sound Waves during the Interaction of Meteoroid Tails with the Earth’s Ionosphere 流星体尾巴与地球电离层相互作用过程中的离子声波

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-05 DOI: 10.1134/S1063780X24600622

T. I. Morozova, S. I. Popel

{"title":"Ion-Sound Waves during the Interaction of Meteoroid Tails with the Earth’s Ionosphere","authors":"T. I. Morozova, S. I. Popel","doi":"10.1134/S1063780X24600622","DOIUrl":"10.1134/S1063780X24600622","url":null,"abstract":"The ion-acoustic instability in the tails of meteoroids as a result of their passage through the Earth’s atmosphere is studied and the conditions under which it develops are given. The development of this instability occurs as a result of the relative motion of the plasma of meteoroid tails and the dusty plasma of the Earth’s ionosphere. Dust, in turn, creates conditions when this instability can develop in a situation of approximately equal ion and electron temperatures, which is observed in the plasma–dust system under consideration. The mechanism of the excitation of ion-sound waves as a result of the development of the ion-acoustic instability in meteoroid tails is shown. The growth rates of the ion-acoustic instability and the characteristic times of its development are found. It is shown that the instability has time to develop during the time of passage of a meteoroid body in the Earth’s atmosphere and the formation of a meteoroid trail, which has values much greater than the time of development of ion-acoustic instability in the system under consideration. The wave vectors and velocities of meteoric bodies, at which the development of the ion-acoustic instability is expected, are found. It is noted that the instability can reach a nonlinear regime at possible large wave amplitudes.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 7","pages":"829 - 833"},"PeriodicalIF":0.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223468","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

Electric Field on the Surface of a Metal Electrode Covered by a Dielectric Film in Plasma 等离子体中介质膜覆盖的金属电极表面的电场

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-09-05 DOI: 10.1134/S1063780X24601056

V. A. Ivanov, M. E. Konyzhev, M. A. Tereshchenko, A. A. Dorofeyuk, T. I. Kamolova, S. N. Satunin

{"title":"Electric Field on the Surface of a Metal Electrode Covered by a Dielectric Film in Plasma","authors":"V. A. Ivanov, M. E. Konyzhev, M. A. Tereshchenko, A. A. Dorofeyuk, T. I. Kamolova, S. N. Satunin","doi":"10.1134/S1063780X24601056","DOIUrl":"10.1134/S1063780X24601056","url":null,"abstract":"Electric field on the surface of a metal electrode covered by a continuous dielectric film and immersed in plasma is calculated at negative electrode potential Ψ when parameter eΨ substantially exceeds electron temperature Te (left( {frac{{ePsi }}{{{{T}_{e}}}} gg 1} right)). It is established that strong electric field with a magnitude of 1–10 MV/cm can appear inside the film at plasma density of 1012–1013 cm–3 and electron temperature of Te = 10 eV as a result of charging of the outer film 10–1000 nm in thickness surface by a flux of positive ions from plasma. The magnitude of the electric field at film discontinuities is comparable to that inside the film. The magnitude of the electric field at the surface of the dielectric film and at the film-free clean metal surface in plasma is substantially lower than that inside the film. Strong electric fields inside the film and at its discontinuities can lead to electrical breakdown inside the film and at its discontinuities. The electrical breakdown of the dielectric film can initiate the unipolar arcing on metals, drive microplasma discharges and form centers of explosive electron emission on metal surfaces in plasma.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 7","pages":"865 - 874"},"PeriodicalIF":0.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223588","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