Contributions to Plasma Physics最新文献_第6页

Amplitude modulation and nonlinear dynamics of small amplitude ion-acoustic waves in five component cometary plasmas 五成分彗星等离子体中小振幅离子声波的振幅调制与非线性动力学

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-22 DOI: 10.1002/ctpp.202400008

Debaditya Kolay, Debjit Dutta, Biswajit Sahu

{"title":"Amplitude modulation and nonlinear dynamics of small amplitude ion-acoustic waves in five component cometary plasmas","authors":"Debaditya Kolay, Debjit Dutta, Biswajit Sahu","doi":"10.1002/ctpp.202400008","DOIUrl":"10.1002/ctpp.202400008","url":null,"abstract":"The formation and propagation dynamics of the finite-amplitude ion-acoustic wave (IAW) structures (e.g., soliton, breather, rogue wave, etc.) is theoretically investigated in a plasma comprising of kappa distributed solar and cometary electrons of different temperatures, a hot <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>H</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 <msup>\u0000 <mi>O</mi>\u0000 <mo>+</mo>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {mathrm{H}}_3{mathrm{O}}^{+} $$</annotation>\u0000 </semantics></math> drift ion component, and a pair of oppositely charged oxygen ion components. The modified-KdV (mKdV) equation is derived in order to study the propagation dynamics of the ion-acoustic solitary wave (IASW). It is then converted into the nonlinear Schrödinger equation (NLS) through appropriate algebraic manipulation in order to observe the amplitude modulation of the IAWs. Also, the appearance of envelope soliton and the possibility of breather structure formation have been studied from the NLS equation. The dependence of plasma parameters on the formation and propagation of IAW structures has been briefly discussed. The modified-KdV equation is reduced in a dynamical system through the application of coordinate transformation. The existence of finite-amplitude nonlinear and supernonlinear IAWs is demonstrated by phase plane analysis. Due to the fact that the results are primarily associated with cometary plasma, they possibly provide greater insight of the nonlinear characteristics of cometary plasma.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108476","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

Kinetic theory of weakly ionized plasma and electrolyte mixtures including Onsager matrix and frequency dispersion effects 弱电离等离子体和电解质混合物的动力学理论，包括昂萨格矩阵和频散效应

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-20 DOI: 10.1002/ctpp.202300161

W. Ebeling

引用次数: 0

Issue Information: Contrib. Plasma Phys. 04/2024 发行信息：Contrib.等离子体物理 04/2024

IF 1.6 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-16 DOI: 10.1002/ctpp.879

引用次数: 0

Dynamics of electron capture in positron-hydrogen scattering under dense semi-classical plasmas 高密度半经典等离子体下正电子-氢散射中的电子俘获动力学

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-16 DOI: 10.1002/ctpp.202400012

Kamalika Das, Netai Das, Arijit Ghoshal

{"title":"Dynamics of electron capture in positron-hydrogen scattering under dense semi-classical plasmas","authors":"Kamalika Das, Netai Das, Arijit Ghoshal","doi":"10.1002/ctpp.202400012","DOIUrl":"10.1002/ctpp.202400012","url":null,"abstract":"The scattering dynamics of electron capture in <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mi>e</mi>\u0000 <mo>+</mo>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {mathrm{e}}^{+} $$</annotation>\u0000 </semantics></math>-H(1 s) scattering under dense semi-classical plasma (DSCP) environments has been investigated theoretically. Coupled multi-channel two-body Lippmann-Schwinger equations have been solved by retaining <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mi>e</mi>\u0000 <mo>+</mo>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {mathrm{e}}^{+} $$</annotation>\u0000 </semantics></math>+H(1 s) and p + Ps(1 s) channels to calculate the cross sections (CS) of the electron capture process at intermediate and high incident energies. The effective interaction of the plasma charged particles is modelled by a pseudopotential which is a function of two parameters, namely the plasma screening strength and the de Broglie wavelength. A detailed study is made to explore the changes in the CSs of the above-mentioned process with respect to the variation in the plasma screening strength and de Broglie wavelength. Significant changes are found to take place, when the screening strength and the de Broglie wavelength are varied. Specifically, the sharp minimum in the differential CS moves toward the forward direction with increasing de Broglie wavelength at a given screening strength.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140969468","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

Plasma emission spectroscopy diagnosis of a direct current reverse-brush electrode discharge 直流反向刷电极放电的等离子体发射光谱诊断

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-16 DOI: 10.1002/ctpp.202400032

Xingbao Lyu, Zhiyong Li, Yiqun Ma, Ying Wang, Chengxun Yuan, Anatoly Kudryavtsev, Zhongxiang Zhou

{"title":"Plasma emission spectroscopy diagnosis of a direct current reverse-brush electrode discharge","authors":"Xingbao Lyu, Zhiyong Li, Yiqun Ma, Ying Wang, Chengxun Yuan, Anatoly Kudryavtsev, Zhongxiang Zhou","doi":"10.1002/ctpp.202400032","DOIUrl":"10.1002/ctpp.202400032","url":null,"abstract":"In this work, emission spectra measurements from direct current (DC) reverse-brush discharge plasmas were used to elucidate the energy level transition processes corresponding to each spectral line based on the mechanism of emission spectrum generation. The axial distribution patterns of the spectral line intensity and the electron excitation temperature in the electrode gap and post-cathode space were systematically investigated. By comparing the acquired experimental results, it was observed that both the relative intensity of the plasma emission spectra and the electron excitation temperature in the electrode gap were higher than in the post-cathode space, while their axial distribution trends exhibited an initial increase followed by a decrease. Additionally, the impact of the discharge gas pressure, reverse-brush electrode thickness, and the number of electrode openings on the emission spectral line intensity and electron excitation temperature in the electrode gap were explored. Explanations for the underlying physical mechanisms were also provided.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970714","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. 04/2024 封面图片：Contrib.Plasma Phys.

IF 1.6 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-16 DOI: 10.1002/ctpp.880

引用次数: 0

First SOLPS-ITER simulations of ASDEX Upgrade partially detached H-mode with boron impurity: The missing radiation at the outer strike-point region 首次 SOLPS-ITER 模拟 ASDEX 升级部分脱离 H 模式的硼杂质：外击点区域缺失的辐射

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-05-15 DOI: 10.1002/ctpp.202300139

S. O. Makarov, D. P. Coster, T. Gleiter, D. Brida, M. Muraca, R. Dux, P. David, B. Kurzan, X. Bonnin, M. O'Mullane, ASDEX Upgrade Team

引用次数: 0

Numerical validation of Yukawa fluid excitations within the quasilocalized charge approximation (QLCA) theory 准聚焦电荷近似（QLCA）理论中汤川流体激波的数值验证

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-04-30 DOI: 10.1002/ctpp.202400026

Prince Kumar, Devendra Sharma

{"title":"Numerical validation of Yukawa fluid excitations within the quasilocalized charge approximation (QLCA) theory","authors":"Prince Kumar, Devendra Sharma","doi":"10.1002/ctpp.202400026","DOIUrl":"10.1002/ctpp.202400026","url":null,"abstract":"A first principle molecular dynamics (MD) simulation study on the nonlinear excitations in a quasi-localized state of a Yukawa system is presented to validate the findings of the nonlinear quasi-localized charge approximation (QLCA) model. Unlike solids or gases, quasi-localized states lack certain simplifying features, such as the ability to assume a fixed shape or volume, and they combine large displacements with strong interactions, further complicating the theoretical underpinnings of their behavior. In a recent paper [P. Kumar and D. Sharma, Physics of Plasmas 30 (2023)], the nonlinear QLCA model was applied to characterize the nonlinear excitations in a quasi-localized state of a Yukawa system, as existing continuum models have shown limited success in this regime. The simulation data presented with the screening and coupling parameters show a close agreement with the QLCA model findings. The MD simulations validate the prediction made by the QLCA model that the properties of a soliton remain unaffected by variations in the coupling parameter. The prediction made by QLCA regarding the formation of multiple solitons at higher screening parameter values has also been confirmed by the MD simulation data. The possibility of the formation of rarefactive solitons at relatively high screening parameter values within the QLCA model is also discussed.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841170","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

Dynamics and reorganization of dust chains in a complex plasma 复杂等离子体中尘埃链的动力学和重组

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-04-18 DOI: 10.1002/ctpp.202300179

Yang Liu, Baoxia Li, Guannan Shi, Feng Huang

引用次数: 0

Dynamics of strongly correlated quantum systems from an extended Singwi-Tosi-Land-Sjölander closure for the BBGKY hierarchy 从 BBGKY 层次的扩展 Singwi-Tosi-Land-Sjölander 闭合看强相关量子系统的动力学特征

IF 1.3 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2024-04-12 DOI: 10.1002/ctpp.202400018

Hanno Kählert

引用次数: 0