Contributions to Plasma Physics最新文献_第7页

The Effect of q-Nonextensive Distribution on Breather Structures in Dusty Plasma With Generalized Polarization Force 广义极化力下尘埃等离子体中q-非扩展分布对呼吸结构的影响

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-05-04 Epub Date: 2026-02-04 DOI: 10.1002/ctpp.70074

Uday Narayan Ghosh, Uttam Kumar Mahato

{"title":"The Effect of q-Nonextensive Distribution on Breather Structures in Dusty Plasma With Generalized Polarization Force","authors":"Uday Narayan Ghosh, Uttam Kumar Mahato","doi":"10.1002/ctpp.70074","DOIUrl":"https://doi.org/10.1002/ctpp.70074","url":null,"abstract":"<div>\u0000 \u0000 This theoretical study investigates the nonextensive effect on breather structures in dusty plasma with modified polarization force. The plasma model comprises positively and negatively charged dust grains, along with ions and electrons. We examine breather soliton structures by deriving 1-soliton and 2-soliton solutions within the framework of the Gardner Equation (GE), in an inhomogeneous, unmagnetized dusty plasma affected by a generalized polarization force. The nonlinear evolution equation, that is, the GE, which extends the Korteweg–de Vries (KdV) equation by incorporating both quadratic and cubic nonlinearities, is obtained using the Reductive Perturbation Technique (RPT). The breather solutions are derived by applying the Hirota Bilinear Method (HBM) to the GE. Our findings reveal that the q-nonextensive properties of the electron and ion populations significantly impact the characteristics of breather solitons. Such oscillatory wave packets are known to play important roles in hydrodynamics and nonlinear optics, where their interactions can alter the dynamics of the surrounding wave field. The insights gained from this study may also have applications in understanding finite-amplitude wave propagation in natural environments such as the atmosphere, oceans, optical fibers, and signal processing systems.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148064622","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

Three-Dimensional Arc Erosion Simulation and Contact Surface Roughness Research 三维电弧侵蚀模拟及接触面粗糙度研究

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-05-04 Epub Date: 2026-01-30 DOI: 10.1002/ctpp.70084

Haitao Wang, Kerun Jing, Yuxuan Liu

{"title":"Three-Dimensional Arc Erosion Simulation and Contact Surface Roughness Research","authors":"Haitao Wang, Kerun Jing, Yuxuan Liu","doi":"10.1002/ctpp.70084","DOIUrl":"https://doi.org/10.1002/ctpp.70084","url":null,"abstract":"<div>\u0000 \u0000 With the advancement of the electrification process, DC relays have been widely used in various fields, but the arc erosion problem of their contacts limits their service life and reliability. This paper establishes a three-dimensional arc simulation model based on magnetohydrodynamic dynamics, and studies the simulation research on the arc erosion characteristics and surface roughness parameters of the contacts during the breaking process of DC relays. By constructing a three-dimensional arc simulation model, simulation analyses were conducted for four working conditions: 450 V/100A, 750 V/100A, 450 V/300A, and 750 V/300A. The results show that the simulation results of the erosion area ratio, peak height and peak-valley are highly correlated with the experimental results (Pearson correlation coefficients are 0.9479, 0.9950, and 0.9817 respectively). In addition, erosion skewness has been introduced to evaluate arc stability, allowing for a more intuitive observation of the erosion condition on the contact surface through simulation models. The sputtering mass and evaporation mass were calculated through a three-dimensional arc simulation model, and the reliability of the simulation model was further verified by the erosion quality of the contacts. This provides important theoretical support for optimizing the erosion resistance of contact materials and extending the service life of DC relays.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148099101","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 Electric Field on Shear Viscosity in 3D Dusty Plasmas 电场对三维尘埃等离子体剪切粘度的影响

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-05-04 Epub Date: 2026-02-05 DOI: 10.1002/ctpp.70082

Muhammad Asif Shakoori, Misbah Khan, Haipeng Li, Aamir Shahzad, Maogang He, Muhammad Riaz

{"title":"Effects of Electric Field on Shear Viscosity in 3D Dusty Plasmas","authors":"Muhammad Asif Shakoori, Misbah Khan, Haipeng Li, Aamir Shahzad, Maogang He, Muhammad Riaz","doi":"10.1002/ctpp.70082","DOIUrl":"https://doi.org/10.1002/ctpp.70082","url":null,"abstract":"<div>\u0000 \u0000 In this study, we present a theoretical analysis of the shear viscosity (η) in three-dimensional dusty plasmas (DPs) through molecular dynamics simulations under the influence of an external electric field (E). The Green-Kubo formula is applied to compute η across various values of E, Coulomb coupling, and screening parameters. The simulation results of η at zero E (= 0.0) are compared with existing data and discuss the applicability of the Green-Kubo formula. It is found that this method provides overestimations but is still applicable to approximation investigations of η in cooled liquid states of DPs. Further, our investigations reveal that η is anisotropic when applied to E. The results of anisotropic η in DP liquids identify three distinct regimes. The first is a slight decrease in η, indicating the presence of repulsive interactions at low E values. The second is a rapid increase, suggesting strong, attractive interactions at intermediate E values. The third shows relatively stable behavior, indicating saturation at high E values. The obtained values of η as a function of normalized temperature follow the temperature scaling law. Furthermore, dust particles align along the z-axis and form clusters; the number and size of the clusters depend on the strength of the E. We show that using the Green-Kubo relation with a wake potential in DPs provides reliable and accurate predictions of E impact on η. These results enhance understanding of the anisotropic η and electrorheological properties of DPs, offering valuable insights into structural transitions influenced by the E.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148066422","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

NH3 Plasma Treatment of PTFE Produces Changes in Surface Wettability and Elemental Composition NH3等离子体处理聚四氟乙烯产生表面润湿性和元素组成的变化

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-05-04 Epub Date: 2025-12-09 DOI: 10.1002/ctpp.70069

Sannad A. Jawad, Arcana G. L. O'Regan, Morgan J. Hawker

引用次数: 0

Fully Nonlinear Ion Acoustic Solitary Structures in Magnetized Non-Maxwellian Plasmas 磁化非麦克斯韦等离子体中的完全非线性离子声孤立结构

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-05-04 Epub Date: 2026-01-30 DOI: 10.1002/ctpp.70083

Muktarul Rahman, Saytendra Nath Barman, Nabanita Das

{"title":"Fully Nonlinear Ion Acoustic Solitary Structures in Magnetized Non-Maxwellian Plasmas","authors":"Muktarul Rahman, Saytendra Nath Barman, Nabanita Das","doi":"10.1002/ctpp.70083","DOIUrl":"https://doi.org/10.1002/ctpp.70083","url":null,"abstract":"<div>\u0000 \u0000 In this work, we investigate fully nonlinear, arbitrary amplitude ion-acoustic (IA) solitary waves in a magnetized, collisionless plasma composed of inertial warm fluid ions and non-Maxwellian electrons obeying a <math>\u0000 <mrow>\u0000 <mi>κ</mi>\u0000 <mtext>-</mtext>\u0000 </mrow></math>deformed Kaniadakis distribution. To study these arbitrary amplitude IA solitary waves, the governing plasma model equations are reduced to a single energy-integral using the Sagdeev pseudo-potential method. The conditions required for the existence of IA solitary waves are examined numerically. Moreover, the regions of existence of IA solitary waves are identified in terms of key plasma parameters, including propagation obliquity, magnetic field strength, Mach number, ion temperature, and the electron deformation parameter. The influence of these parameters on the Sagdeev potential and the soliton profiles is also analyzed. This study is particularly relevant to ongoing investigations of generalized entropy frameworks in plasma physics.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148099102","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

Suprathermal Soliton Solutions to Nonlinear Schrödinger Equation 非线性Schrödinger方程的超热孤子解

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-16 Epub Date: 2026-01-09 DOI: 10.1002/ctpp.70056

F. E. M. Silveira, M. H. Benetti, I. L. Caldas

引用次数: 0

Collision Phenomena and the Force Korteweg–De Vries Soliton Structure in Dusty Plasma With Polarization Effect 具有极化效应的尘埃等离子体中的碰撞现象和Korteweg-De Vries力孤子结构

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-16 Epub Date: 2025-11-12 DOI: 10.1002/ctpp.70062

Umma Imon, Mohammad Shah Alam

{"title":"Collision Phenomena and the Force Korteweg–De Vries Soliton Structure in Dusty Plasma With Polarization Effect","authors":"Umma Imon, Mohammad Shah Alam","doi":"10.1002/ctpp.70062","DOIUrl":"https://doi.org/10.1002/ctpp.70062","url":null,"abstract":"<div>\u0000 \u0000 Unmagnetized collisionless dusty plasma is used to study the collision processes, phase shifts, electric fields, and the production of Korteweg–De Vries (KdV) and force KdV (FKdV) solitons in the presence of a source term with strength in the mesosphere region (where a layer of positively charged particles is 5 km thick). Dust grains with positive charges, regularized Kappa-distributed electrons, and Maxwellian ions constitute the plasma system under consideration. The extended Poincaré–Lighthill–Kuo (ePLK) approach is used to obtain the two-sided KdV equations and associated phase shifts. The Hirota bilinear method is used to determine the multi-soliton solutions. To investigate the effect of external periodic force, the FKdV equation is derived from the KdV equation. In the environment, as mentioned earlier, the parameters in question are essential for the formation of dust KdV and FKdV solitons, changing the phase shifts, and the interaction process of single, double, triple, and quadruple solitons as well as FKdV solitons. Due to the effects of the relevant parameters in the mesosphere environment, hump-shaped compressive KdV and FKdV solitons are formed, together with both positive and negative phase shifts. The superposition principle is followed by the KdV dust acoustic solitons in the collision processes.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565600","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

Beam-Driven Rayleigh Taylor Instability in Strongly Coupled Dusty Plasma 强耦合尘埃等离子体中光束驱动的瑞利-泰勒不稳定性

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-16 Epub Date: 2025-11-12 DOI: 10.1002/ctpp.70060

Harender Mor, Kavita Rani Segwal, Suresh C. Sharma

引用次数: 0

Inhibition of Four Strains of Spoilage Bacteria by Plasma Technique Synergised With Essential Oil of Oregano 等离子体技术协同牛至精油对4株腐败菌的抑制作用

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-16 Epub Date: 2025-12-12 DOI: 10.1002/ctpp.70059

Yu Chen, Qiang Xiong, Xinfu Li

{"title":"Inhibition of Four Strains of Spoilage Bacteria by Plasma Technique Synergised With Essential Oil of Oregano","authors":"Yu Chen, Qiang Xiong, Xinfu Li","doi":"10.1002/ctpp.70059","DOIUrl":"10.1002/ctpp.70059","url":null,"abstract":"<div>\u0000 \u0000 Serratia liquefaciens (P20), Carnobacterium maltaromaticum (P9), Leuconostoc mesenteroides (P6), and Staphylococcus xylosus (P2) are common spoilage microorganisms in meat products, negatively impacting their nutritional quality and flavor while accelerating spoilage. To extend their shelf life, plasma as a novel non-thermal sterilization technology developed in recent years, can be applied to suppress microbial growth. Oregano essential oil (OEO) also exhibits strong antimicrobial activity, but the synergistic effect of plasma and OEO remains poorly studied. In this study, we evaluated the bactericidal effects of plasma and OEO, both individually and in combination, against these four bacterial strains. Nucleic acid and protein absorbance increased by 0.294/0.234 (P20) and 0.249/0.184 (P9). Additionally, conductivity rose by 3.9 and 2.96 ms/cm, respectively. The results indicated that the integrity of the cell membrane was compromised, thus increasing its permeability. The inhibitory effect of OEO was determined by the minimum inhibitory concentration (MIC) and the diameter of the circle of inhibition. The MICs of P20, P9, P6 and P2 were 15.6, 15.6, 31.2, and 62.5 mg/mL, respectively. The concentration of OEO was directly proportional to the diameter of the circle of inhibition, and plasma binding with OEO showed a better inhibitory effect. The combination of plasma and OEO showed better bacterial inhibition, with P20, P9 and P6 being able to completely inhibit bacterial growth after 120 s of treatment, whereas P2 was completely sterilized at 35 kV for 120 s.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331537","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. 03/2026 封面图片：投稿。等离子体物理学报。2026年3月

IF 1.5 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-03-16 DOI: 10.1002/ctpp.70108

引用次数: 0