Contributions to Plasma Physics最新文献

{"title":"Cover Picture: Contrib. Plasma Phys. 08/2025","authors":"","doi":"10.1002/ctpp.202590015","DOIUrl":"https://doi.org/10.1002/ctpp.202590015","url":null,"abstract":"<p>The temperature-density domain of interest illustrating the approximate region of warm dense matter (WDM) (orange region) and the conditions found within several astrophysical objects. The upper mass density scale refers to the hydrogen plasma considered. The lines of constant coupling parameters (purple) delineate the transition between the weakly and strongly coupled regimes. Similarly, the black line marks the points where the thermal energy is equal to the Fermi energy, indicating the relevance of quantum degeneracy effects. Fig. 1 of the paper by Samuel Schumacher et al. https://doi.org/10.1002/ctpp.70002\u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 8-9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202590015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145426101","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}

{"title":"Issue Information: Contrib. Plasma Phys. 08/2025","authors":"","doi":"10.1002/ctpp.202590016","DOIUrl":"https://doi.org/10.1002/ctpp.202590016","url":null,"abstract":"","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 8-9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202590016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145426102","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}

{"title":"Study on Coupling Characteristics of Hall Thruster Abnormal Ignition","authors":"Yuhan Lin,&nbsp;Zhongxi Ning,&nbsp;Ao Han,&nbsp;Chao Sun,&nbsp;Chenying Li,&nbsp;Tianhang Meng,&nbsp;Yinggang Tong,&nbsp;Wei Mao,&nbsp;Yanlin Hu","doi":"10.1002/ctpp.70048","DOIUrl":"https://doi.org/10.1002/ctpp.70048","url":null,"abstract":"<div>\u0000 \u0000 <p>This study conducted systematic experiments to investigate abnormal ignition in Hall thrusters. The dynamic characteristics of electrical parameters during ignition were monitored using a multi-probe diagnostic system. The experiments revealed that abnormal ignition occurs earliest and most intensely in the coupling region. This can be identified via housing and probes positioned in this area, where plasma demonstrates azimuthal uniformity and axial consistency during normal ignition. Conversely, abnormal ignition displays marked spatial asymmetry. Experimental alterations in thruster and cathode parameters demonstrated that increased anode voltage elevates electron temperature through enhanced electric field energy, consequently boosting ionization rates and space potential. An increase in keeper current suppresses initial abnormal ignition but may exacerbate plasma disturbance if excessive. In conclusion, the primary distinction between abnormal and normal ignition lies in variations within the coupling region.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016257","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}

{"title":"Kinetic Study of Dust Acoustic Waves in Non-Thermal Cairns bi-Maxwellian Plasma","authors":"Rashid Ul Haq,&nbsp;Fazli Hadi,&nbsp;Ullah Zakir,&nbsp;Ahmad Zeeshan","doi":"10.1002/ctpp.70043","DOIUrl":"https://doi.org/10.1002/ctpp.70043","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;The real frequency (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;ω&lt;/mi&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {omega}_r $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) and Landau damping rate (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ gamma $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) of dust acoustic waves propagating in a plasma containing Cairns bi-Maxwellian distributed electrons, ions and negatively charged dust grains are investigated applying kinetic theory approach under the condition &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;v&lt;/mi&gt;\u0000 &lt;mi&gt;td&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;mi&gt;ω&lt;/mi&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;mi&gt;k&lt;/mi&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;v&lt;/mi&gt;\u0000 &lt;mi&gt;ti&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;mo&gt;&lt;&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;v&lt;/mi&gt;\u0000 &lt;mi&gt;te&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {v}_{td}&lt;&lt;omega /k&lt;&lt;{v}_{ti}&lt;&lt;{v}_{te} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. The effect of non-thermality parameter (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∧&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ wedge $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) and electron to ion equilibrium density ratio &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;mi&gt;oe&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;mi&gt;oi&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {n}_{oe}/{n}_{oi} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; on the phase velocity of DAWs are presented. The phase velocity increases with increasing spectral index &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∧&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ wedge $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and decreases as &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;mi&gt;oe&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {n}_{oe} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; decreases. The L","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007880","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}

{"title":"Langmuir Probe Measurements: The Electron Diffusion Parameter Under Collisional Near-Probe Space Charge Layer Conditions","authors":"J. L. Jauberteau,&nbsp;I. Jauberteau","doi":"10.1002/ctpp.70041","DOIUrl":"https://doi.org/10.1002/ctpp.70041","url":null,"abstract":"<p>The corrections which are necessary in the determination of the Electron Energy Distribution Function (EEDF) by means of Langmuir probe under near-probe space-charge layer conditions are investigated. Exact calculations of the first and second derivative function of the I(V) probe characteristic are given and approximations are used to determine the electron diffusion parameter (sink parameter) and consequently the EEDF. The results obtained using these different approximations are discussed and compared with those obtained using other methods reported in the literature.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007793","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}

{"title":"Impact of Nonthermal Plasma on Human Metapneumovirus (HMPV): Mechanisms of Viral Inactivation and Replication Inhibition","authors":"Sohail Mumtaz,&nbsp;Juie Nahushkumar Rana","doi":"10.1002/ctpp.70044","DOIUrl":"https://doi.org/10.1002/ctpp.70044","url":null,"abstract":"<div>\u0000 \u0000 <p>Human Metapneumovirus (HMPV) causes severe respiratory infections, especially in young children, the elderly, and the immunocompromised. Despite its clinical application, effective therapeutic opportunities for HMPV are limited. Currently, no vaccines or specific antiviral therapies are available to prevent or treat HMPV infections, highlighting the necessity to explore and discuss all possible treatment and prevention opportunities. Recently, nonthermal atmospheric pressure plasma (NAPP) has appeared as a promising technology for virus inactivation and inhibition of viral replication. This review discusses how NAPP can possibly inhibit HMPV at several stages of its lifecycle, including viral entry, replication, and host immune modulation, for the first time. While NAPP has shown efficacy against respiratory viruses such as influenza and SARS-CoV-2, its antiviral mechanisms for HMPV are extrapolated from these studies, as direct experimental evidence for HMPV inactivation is currently lacking. NAPP produces reactive nitrogen and oxygen species, UV radiation, and charged particles that damage HMPV surface proteins, hindering viral entry. It also causes oxidative stress that damages viral RNA and host cell machinery, impairing replication and protein synthesis. Additionally, the plasma-treated liquid (PTL) activates the hosts' immune responses for virus clearance. The NAPP technology is an economically affordable and environmentally safe approach and could be useful in combating infectious diseases such as HMPV and its variants. This paper reviews the potential of NAPP as a novel approach to combat HMPV infections, highlighting the need for further research to confirm its efficacy and optimize its application for respiratory viral infections.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007787","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}

{"title":"Hybrid PIC/MC-CVAE Framework for Self-Bias Voltage Prediction and Plasma-Circuit Coupling in Capacitively Coupled Plasma","authors":"Suxin Bao,&nbsp;Jiyang Liu,&nbsp;Fujun Zhu,&nbsp;Gongzeng Liu,&nbsp;Haodong Zhang,&nbsp;Hao Xu,&nbsp;Yan Xing,&nbsp;Zaifa Zhou","doi":"10.1002/ctpp.70042","DOIUrl":"https://doi.org/10.1002/ctpp.70042","url":null,"abstract":"<div>\u0000 \u0000 <p>We developed a traditional computational framework coupling time-dependent external circuit equations with a 2D3V axisymmetric Particle-in-Cell/Monte Carlo (PIC/MC) model. By solving circuit equations at each time step, this framework establishes bidirectional feedback between plasma dynamics and self-bias voltage evolution. Moreover, the superposition of Laplace and Poisson solutions is introduced to avoid solving iteratively for the potential on the boundary, which demands extra Laplace solvers for the direct implicit scheme. To improve computational efficiency, a generative network, named Conditional Variational Autoencoder (CVAE), is implemented to predict self-bias voltage effects, achieving a remarkable 25,000× acceleration compared to the circuit solver while maintaining &gt; 90% waveform fidelity. The grid-independent nature of the CVAE architecture enables parametric studies with arbitrary resolution and reverse-optimization targeting desired self-bias voltages and currents. Furthermore, a novel hybrid framework combining the PIC/MC model with the CVAE surrogate is proposed to enhance computational efficiency in plasma simulations. Numerical simulations of voltage-driven CCPs under varied gap conditions demonstrate the hybrid PIC/MC-CVAE model's capability to quantify self-bias effects, revealing their dependence on electrode configurations. This methodology successfully bridges plasma kinetics and macroscopic circuit behavior, providing an efficient and robust tool for optimizing CCP-based industrial processes.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007786","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}

{"title":"Observation of Mode Transition in Chlorine Plasma Using Optical Emission Spectroscopy","authors":"P. K. Saha,&nbsp;A. Mukherjee,&nbsp;Debanjali Roy,&nbsp;M. Chakraborty","doi":"10.1002/ctpp.70040","DOIUrl":"https://doi.org/10.1002/ctpp.70040","url":null,"abstract":"<div>\u0000 \u0000 <p>This manuscript studies the helicon discharge of chlorine (Cl₂) when radio frequency (RF) power of 13.56 MHz is applied from 300 to 1500 W for two different magnetic fields (300 and 400 G) and three different working pressures—7 × 10⁻⁴, 10⁻³, and 2 × 10⁻³ mbar. Plasma parameters are determined by using RF matching parameters and the actinometry procedure of optical emission spectroscopy (OES). Transition from capacitive-inductive (E-H) mode to helicon (W) mode is observed as RF power increases in the source chamber. Observed jumps in plasma density profile with RF power confirm the mode transition in chlorine discharge. The electron impact ionization increases in the higher power range to sustain the helicon mode. Positive chlorine ion (Cl⁺) density with the variation of RF power is also determined for all the working pressures. Cl⁺ density is found to be higher in the helicon mode with a sharp increase in the density and intensity of the Cl⁺ emission lines.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007843","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}

{"title":"Effect of Dust Size Distribution Using the Nonlinear Schrödinger Equation in an Unmagnetized Dusty Plasma","authors":"Sabah Bibi,&nbsp;Wen-Shan Duan","doi":"10.1002/ctpp.70038","DOIUrl":"https://doi.org/10.1002/ctpp.70038","url":null,"abstract":"<div>\u0000 \u0000 <p>This work derives the nonlinear Schrödinger equation (NLSE) for unmagnetized dusty plasmas using reductive perturbation methods, investigating the instability occurring in dust acoustic envelope waves. The analysis reveals the existence of stable dark envelope solitons and examines how dust particle size distributions influence wave dispersion characteristics. Our results demonstrate significant variations in solitary wave properties when comparing different size distribution models, including discontinuous and continuous power-law distributions. Notably, for dust size ratios <i>c</i> &gt; 1 (where <i>c</i> represents the maximum-to-minimum particle size ratio), plasmas with power-law distributed particles exhibit greater solitary wave mass and velocity compared to those with uniform average-sized particles. These findings provide important insights into nonlinear wave behavior in complex dusty plasma systems.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146007718","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}

{"title":"Comparison Between Induced Compton Scattering Experiments and Particle-In-Cell Simulation","authors":"Kiyochika Kuramoto,&nbsp;Shuta J. Tanaka,&nbsp;Tzu-Yao Huang,&nbsp;M. Sofyan Habibi,&nbsp;Nur Khasanah,&nbsp;Shih-Hung Chen,&nbsp;Hsu-Hsin Chu,&nbsp;Jyhpyng Wang,&nbsp;Chih-Hao Pai,&nbsp;Yao-Li Liu,&nbsp;Chun-Sung Jao,&nbsp;Michel Koenig,&nbsp;Kentaro Sakai,&nbsp;Toseo Moritaka,&nbsp;Youichi Sakawa,&nbsp;Yuji Fukuda,&nbsp;Yasuhiro Kuramitsu","doi":"10.1002/ctpp.70029","DOIUrl":"https://doi.org/10.1002/ctpp.70029","url":null,"abstract":"<div>\u0000 \u0000 <p>Induced Compton scattering (CS) is a quantum nonlinear interaction between an intense electromagnetic field and a rarefied plasma. Although the induced CS is expected to occur in radiation fields with high brightness temperatures such as pulsars in nature, the principle of induced CS has not been proven experimentally. Therefore, we conducted a proof-of-principle experiment of induced CS using an ultra-intense laser. We measured the scattered spectra due to the interaction between the ultra-intense laser and plasma. The observed spectrum shows a nonlinear redshift, which can be explained by induced CS. We also performed particle-in-cell simulations, in which induced CS is not included, and found that the experimental results are not explained by classical plasma physics.</p>\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 10","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145555688","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}