IEEE Transactions on Plasma Science最新文献_第2页

Exploration of a High-Efficiency $G$-Band Klystron Combined With Multigap Cavity and Kladistron Principles 探索结合多隙腔和 Kladistron 原理的高效 $G$-Band Klystron

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-17 DOI: 10.1109/tps.2024.3453969

Zhenting Zheng, Zhigang Lu, Peng Gao, Jingrui Duan, Xiaofan Gui, Zheng Chang, Zhanliang Wang, Yuan Zheng, Huarong Gong, Shaomeng Wang, Yubin Gong

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Three-Dimensional Simulation of Electron Beam Motion in Bent Trap With Magnetic Mirrors 带磁镜的弯曲陷阱中电子束运动的三维模拟

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-17 DOI: 10.1109/tps.2024.3412936

Xiao-Jing Zhang, Fang-Ping Wang, Wen-Shan Duan

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Electrostatic Design of a Tunable Tetrode Electron Gun for Electron Beam Additive Manufacturing Device 用于电子束增材制造设备的可调四极管电子枪的静电设计

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-13 DOI: 10.1109/tps.2024.3449088

Zhenyi Zhang, Zijian Zhou, Keyan Sheng, Haozhe Li, Mianzhi Xiong, Jiangrui Xing, Chunjiang Lin, Jiang Huang

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Spectral Properties and High Brilliance Features of Two-Frequency Step Tapered Asymmetric Undulator Radiation 双频阶梯锥形非对称Undulator辐射的光谱特性和高亮度特征

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-12 DOI: 10.1109/tps.2024.3452930

G. Mishra, Rohit Kamle

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Effect of Cathode Coil on the Commissioning of 42-GHz Gyrotron for ECRH System in SST-1 and Aditya-U 阴极线圈对用于 SST-1 和 Aditya-U ECRH 系统的 42-GHz 陀螺仪调试的影响

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-10 DOI: 10.1109/tps.2024.3423345

Braj Kishore Shukla, Jatin Patel, Harshida Patel, K. G. Parmar, Hardik Mistry, Dharmesh Purohit, Paresh Patel, Artyom Kuzmin, Andrey Mazunin, Elena Soluyanova, Evgeny Tai

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Calculation of Armature Melting Wear Rate Based on Contact Surface Heat Distribution 根据接触面热量分布计算电枢熔化磨损率

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-10 DOI: 10.1109/tps.2024.3406713

Anxin Guo, Xiangyu Du, Xuezhi Wang, Shaowei Liu

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Experimental Assessment of Low-Pressure Plasma Interference-Switch Performance in MW-Class Microwave Pulse Compressor MW 级微波脉冲压缩器中低压等离子体干扰开关性能的实验评估

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-10 DOI: 10.1109/tps.2024.3445718

Vasilios A. Tantanis, Stylianos P. Savaidis, Zisis C. Ioannidis, Dimitra I. Kaklamani, Nikolaos K. Uzunoglu

引用次数: 0

Analysis on the Propagation Characteristics of Terahertz Signals in Blunt-Coned and Sharp-Coned Vehicle in Different Sizes 太赫兹信号在不同尺寸的钝锥形和锐锥形车辆中的传播特性分析

IF 1.5 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-10 DOI: 10.1109/tps.2024.3451064

Pingsheng Liu, Ziyang Zhao, Kai Yuan, Zhikang Chu, Rongxin Tang

引用次数: 0

A Comparative Study of In- and Post-Plasma Catalysis Configurations for Ammonia Synthesis: Effect of Temperature 氨合成中等离子体内和后等离子体催化配置的比较研究：温度的影响

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-09 DOI: 10.1109/TPS.2024.3450849

Kelin Li;She Chen;Hang Guo;Mengbo Li;Lipeng Zhong;Qiuqin Sun;Feng Wang

{"title":"A Comparative Study of In- and Post-Plasma Catalysis Configurations for Ammonia Synthesis: Effect of Temperature","authors":"Kelin Li;She Chen;Hang Guo;Mengbo Li;Lipeng Zhong;Qiuqin Sun;Feng Wang","doi":"10.1109/TPS.2024.3450849","DOIUrl":"10.1109/TPS.2024.3450849","url":null,"abstract":"As an important chemical, ammonia plays an important role in human life and society. Nevertheless, there is a substantial release of CO2 for the traditional industrial ammonia synthesis process. Plasma catalysis can activate gas molecules and lower activation energy, making it a promising avenue for this reaction. The current study reveals that ammonia decomposition within the plasma discharge region significantly limits ammonia production for in-plasma catalysis (IPC) configuration. On the other hand, for post-plasma catalysis (PPC) configuration, the densities of reactive species will decrease when migrating to the downstream catalyst region, which is unfavorable for plasma catalytic ammonia synthesis. Therefore, the performances of ammonia synthesis under different plasma catalytic configurations have been investigated with the catalyst of Ni/Al2O3. In experiments with a N2:H2 flow rate ratio of 3:1, the ammonia concentration under PPC configuration was \u0000<inline-formula> <tex-math>$224.53~mu $ </tex-math></inline-formula>\u0000mol/h, while the synthesis rate under IPC configuration reached \u0000<inline-formula> <tex-math>$592.30~mu $ </tex-math></inline-formula>\u0000mol/h. This indicates that the catalyst located in the discharge zone accelerates ammonia synthesis under ambient temperature. Furthermore, ammonia synthesis experiments were conducted under IPC and PPC configurations at different temperatures. Experimental results show higher ammonia concentrations with IPC configuration at temperatures below 200 °C. Beyond 200 °C, the ammonia concentrations between the two configurations become closer. Finally, the ammonia synthesis reaction mechanisms under IPC and PPC configurations are analyzed, which help to clarify the difference in ammonia synthesis performance under IPC and PPC configurations.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175251","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

Cost-Effective Microwave Assisted ECR Heating Using Combination of Quasi-Locked Low-Power Magnetrons on GLAST-III 在 GLAST-III 上使用准锁定低功率磁控管组合进行经济高效的微波辅助 ECR 加热

IF 1.3 4区物理与天体物理

IEEE Transactions on Plasma Science Pub Date : 2024-09-09 DOI: 10.1109/TPS.2024.3443132

Shahab Ud-Din Khan;Muhammad Faizan Tahir;Zia Ur Rehman;Riaz Khan;Ahmad Ali;Muhammad Abdullah;Sehrish Shakir;Ayesha Alam;Shahzaib Zahid

{"title":"Cost-Effective Microwave Assisted ECR Heating Using Combination of Quasi-Locked Low-Power Magnetrons on GLAST-III","authors":"Shahab Ud-Din Khan;Muhammad Faizan Tahir;Zia Ur Rehman;Riaz Khan;Ahmad Ali;Muhammad Abdullah;Sehrish Shakir;Ayesha Alam;Shahzaib Zahid","doi":"10.1109/TPS.2024.3443132","DOIUrl":"10.1109/TPS.2024.3443132","url":null,"abstract":"Glass spherical tokamak-III (GLAST-III) is a small spherical tokamak (\u0000<inline-formula> <tex-math>$R =20$ </tex-math></inline-formula>\u0000 cm, \u0000<inline-formula> <tex-math>$a =10$ </tex-math></inline-formula>\u0000 cm, and \u0000<inline-formula> <tex-math>$A =2$ </tex-math></inline-formula>\u0000) developed at Pakistan Tokamak Plasma Research Institute (PTPRI). To assist the plasma discharge and generate considerable plasma current in GLAST-III, high-power microwave sources can indeed play an important role in noninductive startups of plasma discharges such as electron cyclotron resonance heating (ECRH). A power-enhanced pulsed microwave source (2.45 GHz and 1.6 kW) has previously been developed and tested at PTPRI. However, higher powers are required to increase the generated charge density for effective pre-ionization. Therefore, a microwave pre-ionization source (up to 20 kW at 2.45 GHz) is installed on GLAST-III to reduce the high-loop voltage requirement during the plasma start-up. ECRH has been effectively utilized for this purpose. In this article, an economical high-power microwave source is fabricated by coupling low-power magnetrons in a waveguide. We employed Walton multiplier circuits for the first time to operate two magnetrons coupled for power addition. The coupling of two magnetrons due to constructive interference is demonstrated successfully during continuous as well as pulsed operation. The scheme can be made more effective in future studies by injection locking of magnetrons. These innovative low-cost schemes can play a pivotal role in carrying out microwave studies on spherical tokamaks such as GLAST-III.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175253","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