Plasma Physics Reports最新文献_第5页

Processes Determining the Energy Confinement in Tokamak Plasmas 确定托卡马克等离子体中能量约束的过程

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X24601093

K. A. Razumova, V. F. Andreev, L. G. Eliseev, M. Yu. Kantor, N. V. Kasyanova, S. E. Lysenko, A. V. Melnikov, N. S. Sergeev

{"title":"Processes Determining the Energy Confinement in Tokamak Plasmas","authors":"K. A. Razumova, V. F. Andreev, L. G. Eliseev, M. Yu. Kantor, N. V. Kasyanova, S. E. Lysenko, A. V. Melnikov, N. S. Sergeev","doi":"10.1134/S1063780X24601093","DOIUrl":"10.1134/S1063780X24601093","url":null,"abstract":"In a brief review, we discuss the processes associated with plasma self-organization in tokamaks, and the model of the self-consistent pressure profiles formation used in the energy and particle balance equations. Plasma self-organization can be interpreted as the formation of a structure consisting from chain of magnetic islands, each of which can form a self-consistent pressure profile. The convergence of island chains leads to anomalous transport, and their divergence leads to the formation of transport barriers. In the proposed model, the total energy flux Γ consists of two main parts: Γ0 and Γ1, where Γ0 corresponds to a self-consistent pressure profile, and the anomalous turbulent flux Γ1 appears, when the pressure profile is distorted by additional heating/cooling, as well as the neoclassical flux Γneo. The electron pressure profiles obtained by Thomson scattering in plasmas with magnetic islands and the effect of sawtooth oscillations on the anomalous Γ1 flux are analyzed. We present examples of the plasma confinement deterioration due to the nonoptimal deposition of additional heating power, and the confinement improvement due to increased radiation losses at the edge, leading to diminishing the level of magnetic fluctuations, which can be associated with the divergence of the chain of magnetic islands or with a decrease in the size of the islands.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 3","pages":"254 - 265"},"PeriodicalIF":1.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165812","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

Simultaneous Local Probe and Optical Measurements in a Discharge with a Hollow Cathode 空心阴极放电中局部探头和光学同时测量

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602603

A. V. Bernatskiy, I. I. Draganov, I. V. Kochetov, V. N. Ochkin

{"title":"Simultaneous Local Probe and Optical Measurements in a Discharge with a Hollow Cathode","authors":"A. V. Bernatskiy, I. I. Draganov, I. V. Kochetov, V. N. Ochkin","doi":"10.1134/S1063780X25602603","DOIUrl":"10.1134/S1063780X25602603","url":null,"abstract":"A movable assembly of a Langmuir probe and a fiber optic sensor was used to simultaneously measure the electron energy distribution function (EEDF) f(u), electron concentration Ne, and the plasma emission spectra I(λ) with a spatial resolution in a discharge in inert gases with reduced pressure supported by a hollow cathode. The dynamic range of the f(u) measurements was 5 orders of magnitude, and the observed spatial measurement ranges for Ne and I(λ) were up to 3 orders of magnitude. It was found that even small additions of xenon to helium resulted in significant changes in the EEDF shape, including spatial changes. The coronal model (CM) was used to calculate the spatial profiles I(λ) for a number of Xe lines in the discharge in the He–Xe (99 : 1) mixture using the measured f(u) and Ne. Even this simple model provides calculated intensities that, on the whole, agree satisfactorily with the measured intensities. The common method of measuring the electron temperature using the relative intensities of the spectral lines of atomic transitions is also discussed.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 3","pages":"340 - 349"},"PeriodicalIF":1.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165813","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

Carbon Dioxide Reforming of Methane in a Glow Discharge at 50 Hz and Atmospheric Pressure 50赫兹和大气压辉光放电下甲烷的二氧化碳重整

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602408

T. S. Batukaev, Yu. A. Lebedev

引用次数: 0

Feasibility Study of Electron Cyclotron Resonance Heating in GOL-NB Device 电子回旋共振加热高尔-铌器件的可行性研究

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602627

E. D. Gospodchikov, O. B. Smolyakova, A. G. Shalashov, V. V. Postupaev

引用次数: 0

Ion Composition of Plasma of a Planar Magnetron in the Gaseous and Vacuum Modes of Operation 平面磁控管在气体和真空工作模式下等离子体的离子组成

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602524

D. B. Zolotukhin, M. V. Shandrikov, G. Yu. Yushkov

引用次数: 0

Steady States of a Diode with Relativistic Electron and Positron Beams 具有相对论性电子束和正电子束的二极管的稳态

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602329

V. I. Kuznetsov, L. A. Bakaleinikov, I. K. Morozov, E. Yu. Flegontova

引用次数: 0

On One Peculiarity of the Ponderomotive Force Induced by an Ion-Cyclotron Wave in the Near-Earth Plasma 近地等离子体中离子回旋波诱导的重力动势的一个特性

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602172

A. V. Guglielmi, A. S. Potapov, F. Z. Feygin

{"title":"On One Peculiarity of the Ponderomotive Force Induced by an Ion-Cyclotron Wave in the Near-Earth Plasma","authors":"A. V. Guglielmi, A. S. Potapov, F. Z. Feygin","doi":"10.1134/S1063780X25602172","DOIUrl":"10.1134/S1063780X25602172","url":null,"abstract":"The theory of the ponderomotive forces in space plasma represents an essential part of the solar-terrestrial physics. The problem that appears when the classical expression governing the ponderomotive force is used for analysis of ion acceleration in the Earth’s magnetosphere under the influence of the ion-cyclotron wave is described. It consists in the fact that the force tends to infinity when the wave frequency approaches the local ion gyrofrequency. It is demonstrated that the singularity appears due to idealizations unavoidably adopted upon construction of the standard theory of ponderomotive forces. Two limiting cases are analyzed: the case of a wide opacity band for the ion-cyclotron waves and the case of narrow opacity band. Two approaches for regularization of the ponderomotive force in the vicinity of the pole of the refractive index for the ion-cyclotron wave are proposed. One of them removes the singularity at the pole at the boundary of the wide opacity band while the other removes it at the boundary of the narrow opacity band. Examples of situations in which the singularity in the ponderomotive force calculated within the framework of the standard theory has to be taken into account when studying wave phenomena in the near-Earth plasma are pointed out.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 3","pages":"309 - 314"},"PeriodicalIF":1.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165441","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

Rotational Instability of the Axisymmetric Trivelpiece–Gould Modes in the Inhomogeneous Electron Beam 非均匀电子束中轴对称三分量-古尔德模式的旋转不稳定性

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X24602311

N. A. Marusov

引用次数: 0

Technique for Plasma Diagnostics Based on Resonance Lines of Ne-Like Kr XXVII Ion and Its Satellites 基于Ne-Like氪XXVII离子及其卫星共振线的等离子体诊断技术

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X25602640

I. Yu. Skobelev, R. K. Kulikov, S. N. Ryazantsev

引用次数: 0

Comparison of Power Absorption Ability of Ar and O2, N2 Plasma of RF Inductive Discharge 射频感应放电中Ar和O2、N2等离子体吸能能力的比较

IF 1.1 4区物理与天体物理

Plasma Physics Reports Pub Date : 2025-07-16 DOI: 10.1134/S1063780X24602165

G. Chen, E. A. Kralkina, S. A. Dvinin, A. M. Nikonov, K. V. Vavilin, I. I. Zadiriev, W. X. Duan, S. D. Fang, J. Shen, Z. Wu

{"title":"Comparison of Power Absorption Ability of Ar and O2, N2 Plasma of RF Inductive Discharge","authors":"G. Chen, E. A. Kralkina, S. A. Dvinin, A. M. Nikonov, K. V. Vavilin, I. I. Zadiriev, W. X. Duan, S. D. Fang, J. Shen, Z. Wu","doi":"10.1134/S1063780X24602165","DOIUrl":"10.1134/S1063780X24602165","url":null,"abstract":"The measurements of the RF power absorption efficiency have been performed in the pressure range of argon in the range of 1 × 10–3–0.7 Torr, oxygen pressures in the range of 8 × 10–4–0.05 Torr, nitrogen pressure 3 × 10–3–4 × 10–2 Torr at the operating frequency of 4 MHz. In argon the efficiency of RF generator power coupling to plasma in the considered pressure range weakly increases with increasing argon pressure. In oxygen and nitrogen plasma at powers below 500 W the RF power coupling efficiency depends non-monotonically on pressure. The admixture of even small amount of oxygen to argon discharge leads to the decrease of RF power coupling efficiency at high Ar pressure and RF generator power below 400 W. A decrease in the fraction of RF generator power absorbed by the plasma under pressure growth leads to a decrease in the plasma density and discharge disruption. Thus, the area of existence of the discharge appears to be limited on the high-pressure side. The higher is the RF generator power, the wider is the range of pressures at which the RF inductive discharge can exist. The numerical simulation showed that the observed experimental facts were due to the peculiarities of the dependence of equivalent plasma resistance on electron density and frequency of electron collisions with heavy particles.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"51 3","pages":"357 - 364"},"PeriodicalIF":1.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166134","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