Contributions to Plasma Physics最新文献_第9页

Issue Information: Contrib. Plasma Phys. 02/2026 发行信息：投稿。等离子体物理学报2/2026

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 DOI: 10.1002/ctpp.70087

引用次数: 0

Dynamics of Ion-Acoustic Solitary Waves in Relativistic Magnetorotating Plasmas in the Presence of Degenerate Electrons and Positrons 简并电子和正电子存在下相对论磁旋等离子体中离子声孤波的动力学

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 Epub Date: 2025-09-22 DOI: 10.1002/ctpp.70052

Satyendra Nath Barman, Muktarul Rahman

{"title":"Dynamics of Ion-Acoustic Solitary Waves in Relativistic Magnetorotating Plasmas in the Presence of Degenerate Electrons and Positrons","authors":"Satyendra Nath Barman, Muktarul Rahman","doi":"10.1002/ctpp.70052","DOIUrl":"https://doi.org/10.1002/ctpp.70052","url":null,"abstract":"<div>\u0000 \u0000 This study examines the nonlinear features of solitary ion-acoustic (IA) waves propagating in a three dimensional magnetorotating plasma composed of warm inertial ions along with degenerate electrons and positrons. Where the ions are taken to be adiabatic and relativistic, and electrons and positrons are supposed to obey the degenerate Thomas-Fermi density distribution. The reductive perturbation approach is employed to derive a generalized Zakharov-Kuznetsov (ZK) equation that characterizes the evolution of nonlinear IA solitary waves. The stationary solution of ZK equation and a Sagdeev potential has been formulated to analyze the variations in the oblique propagation of IA solitary waves. Numerical analysis reveals that the soliton structures are highly sensitive to relevant plasma parameters, including ion temperature, relativistic ion streaming speed, positron concentration, obliqueness angle, magnetic field strength, and rotation frequency. It is found that an increase in ion temperature (or positron concentration) generally reduces the soliton amplitude and broadens (narrows) its width, while stronger relativistic streaming enhances the soliton amplitude and compresses its width. Additionally, the soliton width exhibits a strong dependence on both the external magnetic field and plasma rotation, highlighting the dispersive role of Coriolis force and magnetization effects. Furthermore, comparison between non-relativistic and ultra-relativistic electron/positron degeneracy cases indicates that ultra-relativistic effects support stronger phase velocities and broader solitary structures. These findings may contribute to a comprehensive understanding of soliton propagation in rotating plasmas relevant to both astrophysical phenomena and laboratory settings, where degenerate electrons and positrons coexist under the influence of strong magnetic fields.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568371","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

Impact of Internal Cathode Position on Permanent Magnet Hall Thruster Performance 内阴极位置对永磁霍尔推力器性能的影响

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 Epub Date: 2025-10-08 DOI: 10.1002/ctpp.70055

Yi Li, Jia Liu, Yan Zhang, Zijie Li, Rui Ding, Yong Wang, Hong Li, Liqiu Wei, Yongjie Ding

引用次数: 0

Independent Control of Electron Temperature and Density in Copper Thermionic Vacuum Arc Plasmas 铜热离子真空电弧等离子体中电子温度和密度的独立控制

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 Epub Date: 2025-08-12 DOI: 10.1002/ctpp.70045

Tamer Akan, Çağrı Durmuş

{"title":"Independent Control of Electron Temperature and Density in Copper Thermionic Vacuum Arc Plasmas","authors":"Tamer Akan, Çağrı Durmuş","doi":"10.1002/ctpp.70045","DOIUrl":"https://doi.org/10.1002/ctpp.70045","url":null,"abstract":"<div>\u0000 \u0000 The thermionic vacuum arc (TVA) is a plasma source that generates highly ionized metal vapor plasmas via anodic evaporation, with independent control over plasma parameters through operational adjustments. This study investigates copper (Cu) plasmas produced by a TVA system under stable-state conditions, focusing on the dependencies of electron temperature (Te) and electron number density (Ne) on operating parameters such as arc current (Iarc) and cathode filament current (If). Optical emission spectroscopy (OES) in the 200–1000 nm range was employed to analyze spectral line intensities of neutral Cu atoms. Te was determined via the Boltzmann plot method, yielding values between 4720 ± 250 K and 5370 ± 300 K as the Iarc increased from 300 to 1200 mA (at a fixed If of 18.5 A), while increasing the If from 16 to 19 A elevated Te from 4580 ± 250 K to 5180 ± 300 K, demonstrating distinct contributions of both parameters to electron heating. Ne was determined using Stark broadening analysis, revealing a weak dependence on operating parameters, with values ranging from (5.0 ± 0.8) × 1016 cm−3 to (8.9 ± 0.9) × 1016 cm−3). These findings highlight the TVA's unique capability to controllably tailor plasma properties, making it a promising candidate for advanced coating processes requiring precise plasma parameter modulation.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564969","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

Applying Machine Learning Methods to Laser Acceleration of Protons: Synthetic Data for Exploring the High Repetition Rate Regime 将机器学习方法应用于质子的激光加速：探索高重复率体系的合成数据

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 Epub Date: 2025-10-29 DOI: 10.1002/ctpp.70049

John J. Felice, Ronak Desai, Nathaniel Tamminga, Joseph R. Smith, Alona Kryshchenko, Chris Orban, Michael L. Dexter, Anil K. Patnaik

{"title":"Applying Machine Learning Methods to Laser Acceleration of Protons: Synthetic Data for Exploring the High Repetition Rate Regime","authors":"John J. Felice, Ronak Desai, Nathaniel Tamminga, Joseph R. Smith, Alona Kryshchenko, Chris Orban, Michael L. Dexter, Anil K. Patnaik","doi":"10.1002/ctpp.70049","DOIUrl":"https://doi.org/10.1002/ctpp.70049","url":null,"abstract":"Advances in ultra-intense laser technology have increased repetition rates and average power for chirped-pulse laser systems, which offer a promising solution for many applications including energetic proton sources. An important challenge is the need to optimize and control the proton source by varying some of the many degrees of freedom inherent to the laser-plasma interactions. Machine learning can play an important role in this task, as our work examines. Building on our earlier work in Desai et al. 2024, we generate a large ∼1.5 million data point synthetic data set for proton acceleration using a physics-informed analytic model that we improved to include pre-pulse physics. Then, we train different machine learning methods on this data set to determine which methods perform efficiently and accurately. Generally, we find that quasi-real-time training of neural network models using single-shot data from a kHz repetition rate ultra-intense laser system should typically be feasible on a single GPU. We also find that a less sophisticated model, like a polynomial regression, can be trained even faster and that the accuracy of these models is still good enough to be useful. We provide our source code and example synthetic data for others to test new machine learning methods and approaches to automated learning in this regime.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570136","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

Research on Arc Erosion of Bridge-Type Contacts in DC Relays Under Closing-Breaking Actions 合闸分断作用下直流继电器桥式触点电弧侵蚀的研究

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-11 Epub Date: 2025-09-15 DOI: 10.1002/ctpp.70053

Haitao Wang, Yuxuan Liu, Kerun Jing

{"title":"Research on Arc Erosion of Bridge-Type Contacts in DC Relays Under Closing-Breaking Actions","authors":"Haitao Wang, Yuxuan Liu, Kerun Jing","doi":"10.1002/ctpp.70053","DOIUrl":"https://doi.org/10.1002/ctpp.70053","url":null,"abstract":"<div>\u0000 \u0000 Direct current (DC) relays play a critical role in diverse applications, with bridge-type contacts being widely employed in modern designs. Current research on contact arc erosion predominantly focuses on single-break-point interruption models, which inadequately represent the arc behavior of bridge-type contacts. To address this gap, this paper establishes a bridge-type contact arc model for both closing and breaking actions, alongside a moving contact erosion model. These models investigate the complex erosion effects induced by arcs during contact operations under varying voltages and currents, incorporating magnetic blowout effects. Correlation and error analyzes were conducted between the peak-to-valley height difference (Rt) of the molten pool generated by simulated arc erosion on the moving contact surface and the experimental Rt parameter. The results showed correlation coefficients and errors of 0.943 and 5.48% for the left side, and 0.995 and 3.78% for the right side of the moving contact, respectively, validating the simulation model's effectiveness. Building on this validation, a contact failure prediction method was developed. This method demonstrates that when the Rt value obtained from contact surface erosion under varying conditions exceeds the threshold Rtmax = 364.991 μm, the contact exhibits a 92% probability of failure. The simulation model accurately predicts contact failure across different voltage and current scenarios, providing a practical solution for determining contact voltage and current withstand capabilities during the design phase.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565991","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

Cover Picture: Contrib. Plasma Phys. 01/2026 封面图片：投稿。等离子体物理。01/2026

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-01-19 DOI: 10.1002/ctpp.70080

引用次数: 0

Issue Information: Contrib. Plasma Phys. 01/2026 发行信息：投稿。等离子体物理。01/2026

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-01-19 DOI: 10.1002/ctpp.70079

引用次数: 0

Issue Information: Contrib. Plasma Phys. 10/2025 发行信息：投稿。《等离子体物理学》10/2025

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2025-11-21 DOI: 10.1002/ctpp.202590020