IEEE Transactions on Plasma Science最新文献

Rayleigh–Taylor Instability and Its Growth Rate in Complex Plasmas 复杂等离子体中的瑞利-泰勒不稳定性及其增长率

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-22 DOI: 10.1109/TPS.2023.3303883

Wei-Ping Zhang;Wen-Shan Duan

引用次数: 0

Wave Transmission Through a Plasma-Loaded W-Band Photonic Crystal 等离子体负载w波段光子晶体的波传输

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-22 DOI: 10.1109/TPS.2023.3304189

Jeffrey Hopwood

引用次数: 0

Gyrokinetic Simulation of Kinetic Ballooning Mode and its Parametric Stabilization in Tokamak Plasmas With Impurities 含杂质托卡马克等离子体动力学气球模式的陀螺动力学模拟及其参数稳定

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-22 DOI: 10.1109/TPS.2023.3303420

Yong Shen;Jia-Qi Dong;Jia Li

{"title":"Gyrokinetic Simulation of Kinetic Ballooning Mode and its Parametric Stabilization in Tokamak Plasmas With Impurities","authors":"Yong Shen;Jia-Qi Dong;Jia Li","doi":"10.1109/TPS.2023.3303420","DOIUrl":"https://doi.org/10.1109/TPS.2023.3303420","url":null,"abstract":"Kinetic ballooning mode (KBM) and its parametric stabilization in tokamaks are studied qualitatively by means of gyrokinetic simulation. The circular magnetic tokamak discharge with the Shafranov shift is considered and the \u0000<inline-formula> <tex-math>$hat {s}-alpha $ </tex-math></inline-formula>\u0000 model equilibrium is employed. The kinetic characteristics of ions, such as Landau resonance, magnetic drift, and finite Larmor radius (FLR) are all taken into account. The full ion transit and toroidal drift effects are retained. Impurity effect is also included. As a result, the existence of, and approaching way to the second KBM stable regime were identified. It was first revealed that impurities play a role of stabilizing when the impurity density profile peaks in the same direction as those of the electron and main ion density profiles, owing to that compressibility effects is weakened. It shows that the mode maximum growth rate appears at the turning point of magnetic shear \u0000<inline-formula> <tex-math>$hat {s}_{c} =q /4-q/2$ </tex-math></inline-formula>\u0000, while the formula can be modified due to other plasma parameters such as \u0000<inline-formula> <tex-math>$eta _{i}$ </tex-math></inline-formula>\u0000 and impurity species. Some parametric stabilizations of KBM are suggested, including the accumulation of impurities toward the plasma center; and entering or approaching to the second stable regime by means of making the electron density or ion/electron temperature gradients high enough, by which the internal or edge transport barrier (ITB/ETB) is anticipated to be formed in many cases. In addition, we showed that the artificial control of safety factor and magnetic shear was also beneficial to the stabilization of ballooning mode.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2134-2144"},"PeriodicalIF":1.5,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/27/10238335/10226549.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3507500","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

On the Ion Flux From Beam Plasma to a Metal Target Irradiated by a Pulsed Electron Beam in the Forevacuum Pressure Range 前真空压力范围内脉冲电子束辐照金属靶束等离子体离子通量的研究

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-21 DOI: 10.1109/TPS.2023.3304058

Andrey V. Kazakov;Efim M. Oks;Nikolay A. Panchenko

{"title":"On the Ion Flux From Beam Plasma to a Metal Target Irradiated by a Pulsed Electron Beam in the Forevacuum Pressure Range","authors":"Andrey V. Kazakov;Efim M. Oks;Nikolay A. Panchenko","doi":"10.1109/TPS.2023.3304058","DOIUrl":"https://doi.org/10.1109/TPS.2023.3304058","url":null,"abstract":"We describe our investigations of the influence of electron beam parameters and working gas on the ion flux coming from the beam-produced plasma (beam plasma) to a target irradiated by a pulsed low-energy (up to 9 keV) electron beam in the forevacuum pressure range 4–15 Pa. The ion current from the beam-produced plasma to the target increases with increasing gas pressure and beam current, but decreases with increasing beam accelerating voltage. The use of gas with a greater ionization cross section leads to greater ion flux and correspondingly higher ion current to the irradiated target. The value of ion current to the target from the beam-plasma does not exceed 20% of the electron beam current. The observed dependencies of ion flux (current) to the target are due to changes in the beam-plasma density near the target. These results contribute to our understanding of the generation of beam-plasma by a pulsed electron beam and suggest the application of the ion flux from the beam-plasma to assist in electron-beam modification of dielectric materials in the forevacuum pressure region.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2245-2251"},"PeriodicalIF":1.5,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3490141","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

Electrostatic Surface Modes Under Exchange–Correlation Effects in Semi-Bounded Quantum Plasma 半有界量子等离子体交换相关效应下的静电表面模式

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-21 DOI: 10.1109/TPS.2023.3303218

Bahaa F. Mohamed;Rehab A. Albrulosy

引用次数: 0

Surface Structuring of Zirconium by Thermal Plasma Treatment 热等离子体处理锆的表面结构

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-18 DOI: 10.1109/TPS.2023.3301953

Muhammad Hamza;Asma Hayat;Shazia Bashir;Muhammad Shahid Rafique;Rana Muhammad Ayub;Saira Riaz;Shahzad Naseem;Muhammad Akram Raza;Muhammad Arif Mehmood;Sajid Ali;Syed Muhammad Kamran Shabbir;Muhammad Ammar Afzal

{"title":"Surface Structuring of Zirconium by Thermal Plasma Treatment","authors":"Muhammad Hamza;Asma Hayat;Shazia Bashir;Muhammad Shahid Rafique;Rana Muhammad Ayub;Saira Riaz;Shahzad Naseem;Muhammad Akram Raza;Muhammad Arif Mehmood;Sajid Ali;Syed Muhammad Kamran Shabbir;Muhammad Ammar Afzal","doi":"10.1109/TPS.2023.3301953","DOIUrl":"https://doi.org/10.1109/TPS.2023.3301953","url":null,"abstract":"The thermal plasma setup was designed, fabricated, and successfully established. The effects of thermal plasma treatment on the surface morphological, compositional, electrical, mechanical, and wettability properties of zirconium (Zr) have been investigated. The Zr targets were treated with atmospheric Ar thermal plasma at different Ar flow rates ranging from 10 to 25 L/min and under different treatment times starting from 10 to 25 min. Scanning electron microscope (SEM) and optical analyses reveal the growth of various kinds of surface structures, such as microrods, flakes, pores, cracks, dendrites, agglomerates, and ridges on treated Zr. This growth is explainable on the basis of ion-induced localized heating, melting, collisional sputtering, Coulomb explosion, and thermal spike model. It was observed that both the size and number density of flakes decrease from 8 to 5 \u0000<inline-formula> <tex-math>$mu text{m}$ </tex-math></inline-formula>\u0000 and \u0000<inline-formula> <tex-math>$87times 10^{6}$ </tex-math></inline-formula>\u0000 to \u0000<inline-formula> <tex-math>$37times 10^{6}$ </tex-math></inline-formula>\u0000 cm\u0000<inline-formula> <tex-math>$^{-2}$ </tex-math></inline-formula>\u0000 with increasing Ar flow rate and treatment time. Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analyses show that there are no compositional changes in Zr after Ar plasma. However, slight change in crystallite size and dislocation line density is observed. The electrical conductivity has been decreased, while hardness and wettability of Zr are increased after treatment.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2268-2281"},"PeriodicalIF":1.5,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3503207","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

Study of a 0.3-THz Extended Interaction Oscillator Based on the Pseudospark-Sourced Sheet Electron Beam 基于伪火花源电子束的0.3 thz扩展相互作用振荡器的研究

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-18 DOI: 10.1109/TPS.2023.3303318

Jiacai Liao;Guoxiang Shu;Guangxin Lin;Jujian Lin;Qi Li;Jingcong He;Junchen Ren;Zhiwei Chang;Biaogang Xu;Junzhe Deng;Guo Liu;Cunjun Ruan;Wenlong He

{"title":"Study of a 0.3-THz Extended Interaction Oscillator Based on the Pseudospark-Sourced Sheet Electron Beam","authors":"Jiacai Liao;Guoxiang Shu;Guangxin Lin;Jujian Lin;Qi Li;Jingcong He;Junchen Ren;Zhiwei Chang;Biaogang Xu;Junzhe Deng;Guo Liu;Cunjun Ruan;Wenlong He","doi":"10.1109/TPS.2023.3303318","DOIUrl":"https://doi.org/10.1109/TPS.2023.3303318","url":null,"abstract":"Our previous experimental study of a 0.2-THz extended interaction oscillator (EIO) driven by the pseudospark-sourced (PS) sheet electron beam has revealed one key issue: the discrepancy between the simulated and measured output power was dramatically large. Around this issue, the design and analysis of an improved 0.3-THz EIO are presented in this article. To make the prediction closer to the actual situation, a few factors, including the plasma effect, the ohmic loss caused by the surface roughness, the effective beam current, and the energy spread, are analyzed and considered in the simulations. The plasma is equivalent to a dielectric. To verify the design, the interaction circuit of the 0.3-THz EIO was microfabricated. Its RF performance was measured by using a vector network analyzer, which was in good agreement with the simulation prediction, and its surface roughness was measured by using an optical 3-D surface profiler. Beam–wave interaction simulations having considered the ohmic loss, energy spread, and plasma effect predicted that the upgraded EIO still could produce an output power of 16.3 W at 295.3 GHz.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2199-2204"},"PeriodicalIF":1.5,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3491834","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

Corrections to “Particle-In-Cell Simulations of Ion Beam Properties Produced From a Planar Pinched-Beam Diode” 对“平面窄束二极管产生的离子束特性的细胞内粒子模拟”的修正

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-18 DOI: 10.1109/TPS.2023.3303072

Jesse C. Foster;John W. McClory;Steve B. Swanekamp;Paul F. Ottinger

引用次数: 0

A 0-D Electric Gun Model for the Optimization of Flyer Acceleration to Hypervelocities 飞片加速至超高速优化的零维电枪模型

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-18 DOI: 10.1109/TPS.2023.3300093

Mila D. Fitzgerald;James D. Pecover;Nik Petrinic;Daniel E. Eakins

{"title":"A 0-D Electric Gun Model for the Optimization of Flyer Acceleration to Hypervelocities","authors":"Mila D. Fitzgerald;James D. Pecover;Nik Petrinic;Daniel E. Eakins","doi":"10.1109/TPS.2023.3300093","DOIUrl":"https://doi.org/10.1109/TPS.2023.3300093","url":null,"abstract":"The electric gun is a pulsed power projectile launcher that utilizes the rapid expansion of an ohmically heated exploding foil and electromagnetic (EM) forces to accelerate thin flyers up to 20 km/s. Though the launcher has high energetic efficiencies when compared to alternative techniques, the process of launching flyers above 0.5 mm thickness in this manner often results in uncontrolled launch characteristics and premature failure of the flyer. This behavior is challenging to model numerically, limiting optimization work to sophisticated and computationally intensive magneto-hydrodynamics (MHD) codes. This work presents a 0-D model designed to expedite the parametric optimization process of electric gun loads to launch thick flyers to hypervelocities. The model is capable of predicting not only the foil state and flyer dynamics, but uses a novel approximation to predict the maximum pressure state in the flyer. The model is verified against 3-D MHD Eulerian hydrocode “Code \u0000<inline-formula> <tex-math>$mathbb{B}$ </tex-math></inline-formula>\u0000” and the validity of the approximations made in simplifying the model are discussed. With this model, the electric gun could be optimized to launch thicker flyers and achieve higher pressures and shock durations, enabling it to become a complimentary tool to existing projectile launch platforms.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2347-2357"},"PeriodicalIF":1.5,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3488400","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: 1

Experimental Studies on the Roles of Space Charge Neutralization in a Ring Cusp Ion Source 环尖离子源中空间电荷中和作用的实验研究

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2023-08-18 DOI: 10.1109/TPS.2023.3302419

Bharat Singh Rawat;S. K. Sharma;V. Prahlad;B. Choksi;U. K. Baruah

{"title":"Experimental Studies on the Roles of Space Charge Neutralization in a Ring Cusp Ion Source","authors":"Bharat Singh Rawat;S. K. Sharma;V. Prahlad;B. Choksi;U. K. Baruah","doi":"10.1109/TPS.2023.3302419","DOIUrl":"https://doi.org/10.1109/TPS.2023.3302419","url":null,"abstract":"Experimental studies in a ring cusp ion source are performed for investigating the role of space charge neutralization by measuring ion beam profiles, fluxes of charge exchange ions, and distribution of ion beam neutralizing electrons. The measurements are carried out using the argon ion beam of current 30–60 mA and beam energy 1200 eV. A Faraday cup array (FCA) equipped with filtering electrodes is developed and utilized for measuring the ion beam profiles by filtering out the neutralizing electrons and slow-moving charge exchange ions from the ion beam. The radial flux of charge exchange ions is measured using a flat Faraday probe mounted at a location outside the ion beam. The flat Faraday probe is shielded from the energetic beam ions. The flux of charge exchange ions is studied to assess the effect of space charge neutralization inside the ion beam. The reduction in floating potential observed with improved space charge neutralization is found to correlate with a reduced radial flow of charge exchange ions. The FCA is also utilized to measure the distribution profile of neutralizing electrons in the ion beam by biasing its filtering electrodes and Faraday cups (FCs) at appropriate potentials. The radial profiles of neutralizing electrons are found Gaussian as similar to that of the beam ions. It is suggested that the neutralizing electrons are dispersed as similar to the fast ion distribution in order to accomplish an evenly distributed space charge neutralization.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"51 8","pages":"2218-2224"},"PeriodicalIF":1.5,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3491227","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