{"title":"Transient Analysis of Absorption Characteristics of Argon Plasma Column Array Under High-Power Microwave Irradiation","authors":"Zhengming Tang;Yusen Yang;Lin Wang","doi":"10.1109/TPS.2024.3479281","DOIUrl":"https://doi.org/10.1109/TPS.2024.3479281","url":null,"abstract":"This article mainly focuses on the absorption properties of microwave plasma. Based on the plasma fluid method, plasma column array structures are proposed to study the transmission of high-power microwave (HPM) pulses. The damping effect of the plasma column array on HPM with different plasma column gap widths, different plasma column radius lengths and a double-layer plasma column array in combination with an absorbing material structure is investigated. The physical process and mechanism of plasma shielding effect on high-power microwaves are determined. The results suggest that large gaps between the plasma columns weaken the absorption and reflection of electromagnetic (EM) waves by the plasma column array. Increasing the plasma column radius can improve the absorption and reflection of EM waves and realize the limiting function. In addition, the double-layer plasma column array structure combined with absorbing material can prevent the loss of EM waves and optimally achieve the EM wave absorption effect. This study can provide more effective guidelines for microwave protection applications.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4562-4569"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798020","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}
K. Navaneetha Pandiyaraj;Rajendra R. Deshmukh;Anthony B. Murphy;Rino Morent;Truell Hyde;Shu Lai;Francesco Taccogna;Steven J. Gitomer
{"title":"Guest Editorial Special Issue on Plenary, Invited, and Selected Papers From the Third International Conference on Advances in Plasma Science and Technology (ICAPST-23)","authors":"K. Navaneetha Pandiyaraj;Rajendra R. Deshmukh;Anthony B. Murphy;Rino Morent;Truell Hyde;Shu Lai;Francesco Taccogna;Steven J. Gitomer","doi":"10.1109/TPS.2024.3465129","DOIUrl":"https://doi.org/10.1109/TPS.2024.3465129","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 7","pages":"2390-2391"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10736383","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573616","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":"A Review on Megavolt Pulsed Switches and Their Time Delay Jitters","authors":"Tianchi Wang;Yingchao Du;Wei Chen","doi":"10.1109/TPS.2024.3477737","DOIUrl":"https://doi.org/10.1109/TPS.2024.3477737","url":null,"abstract":"In large pulsed power drivers for the research of high-energy-density physics (HEDP) and high power electromagnetic (HPEM), megavolt pulsed gas switches are crucial and indispensable components that transfer energy and compress the pulse. Their working conditions and characteristics are remarkably different. Their time delay jitter under pulsed voltage is a key indicator that influences the pulsed power driver’s output waveform quality and stability. This article summarized the megavolt pulsed switches and their time delay jitters. First, the composition of the large pulsed power driver’s time delay and jitter and the influence of the megavolt switch are analyzed. Then, the configurations and working parameters such as the time delay jitter of three types of existent megavolt switches (self-breakdown, self-triggered, and externally triggered switches) are introduced. After summarizing the research progress of the time delay jitter characteristics of megavolt switches, the experimental, theoretical, and simulative approaches are discussed. The breakdown probability distribution model provides a tool for analyzing the megavolt switches’ time delay and jitter. Based on the framework of the probability distribution model and relevant experimental phenomena, the general methods to reduce the jitter in single-stage and multistage switches are extracted.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4655-4670"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797939","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":"Compact Wide Range High-Voltage/Current Impulse Generator for Simulating Various Indirect Effects of Lightning","authors":"Woo-Cheol Jeong;Su-Mi Park;Hong-Je Ryoo","doi":"10.1109/TPS.2024.3479210","DOIUrl":"https://doi.org/10.1109/TPS.2024.3479210","url":null,"abstract":"In this study, a high-voltage, high-current impulse generator to evaluate the indirect effects of lightning was developed. The impulse generator was designed to meet 14 distinct conditions necessary for simulating various lightning-induced scenarios. To accommodate these diverse requirements, pulse forming networks (PFNs) incorporating passive elements and high-repetition-rate semiconductor switches for high voltage and current was designed. The major challenge addressed in this research was the design of a high-voltage capacitor charger (HVCC) that can efficiently supply the required energy under each specified condition with a single unit. Because it should rapidly and repeatedly charge capacitors that vary in size by up to 40 000 times. Therefore, unlike typical HVCC designs that are optimized based on a specific voltage or current, this study selected two output currents as part of the HVCC design process, taking into account capacitor size, charging speed, and precision, along with various output voltage conditions. The HVCC was designed based on an analysis of an inductor-capacitor–capacitor (LCC) resonant converter utilizing a trapezoidal resonant current. It was designed to maintain a consistent target output current across a wide range of output voltages and capacitor conditions, while minimizing the stress on switches. Additionally, an appropriate structural design was incorporated to handle high voltages. The HVCC has been experimentally verified to precisely charge a wide range of load capacitors (from 1 to 38 500 nF) with high voltage (up to 11 kV) at a rapid repetition rate (up to 11 kHz). Additionally, through integrated experiments with the PFN, it has been experimentally verified that the system can precisely output impulses at all targeted conditions, including high-voltage impulses of 3300 V at a rapid repetition rate of 11 kHz and high-current impulses of 5100 A.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4639-4647"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797947","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":"The Impact of the Generalized (r, q) Distributed Electrons on the Formation of Solitary Wave Structure in Magnetized Negative Ion Plasma","authors":"N. Akhtar;S. Hussain","doi":"10.1109/TPS.2024.3472696","DOIUrl":"https://doi.org/10.1109/TPS.2024.3472696","url":null,"abstract":"Ion-acoustic solitary waves in the negative ion plasmas in the presence of generalized (r, q) distributed electrons are studied. Equations of states for positive and negative ions are included in magnetized plasma. Reductive perturbation method (RPM) are applied to derive the Zakharov-Kuznetsov (ZK) equation. The impact of variation of spectral indices on propagation characteristic of ion acoustic solitary waves in negative ion plasma is discussed. The effect of negative ion temperature in the presence of generalized distribution of electrons is also presented. Our findings predict that equation of state of negative ions affects amplitude and width of the nonlinear solitary structure significantly. Our findings are applicable to laboratory as well as space plasmas where negative ion plasmas exist with magnetic field, and a flat-top feature for low-energy electrons and a high-energy tail in the distribution function of the electrons have been observed.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 8","pages":"3094-3102"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600342","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}
Sven Degenkolbe;Hans-Stephan Bosch;Olaf Grulke;Jörg Schacht;Erik Scharff;Reinhard Vilbrandt;Axel Winter
{"title":"The Requirements for the Fast Interlock System of Wendelstein 7-X","authors":"Sven Degenkolbe;Hans-Stephan Bosch;Olaf Grulke;Jörg Schacht;Erik Scharff;Reinhard Vilbrandt;Axel Winter","doi":"10.1109/TPS.2024.3391509","DOIUrl":"https://doi.org/10.1109/TPS.2024.3391509","url":null,"abstract":"The purpose of the Wendelstein 7-X central safety system (css) is to minimize the risk of injury to personnel and damage to equipment. The design of the css follows the IEC 61511 standard for functional safety in the industry. Due to the nature of the hardware used, the reliability of the system is high and the response time is moderate (in the order of seconds). To protect the components inside the plasma vessel during plasma operation, the response time must be much faster (on the order of 100 ms). As part of the safety control system, the fast interlock system (FIS) has been installed but with different hardware to that used for the css. The purpose of this article is to present the design process, starting with a risk assessment for the components inside the plasma vessel due to thermal loads, which determines the requirements for the FIS. The basic design criteria for the FIS to ensure the principles of functional safety are described.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"3622-3627"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10734844","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810526","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":"Efficiency Study of Hybrid Armatures With Coil Launchers of Different Calibres","authors":"Yadong Zhang;Ao Zhou;Xiong Lin;Zhiqiang Sun","doi":"10.1109/TPS.2024.3476451","DOIUrl":"https://doi.org/10.1109/TPS.2024.3476451","url":null,"abstract":"Improving efficiency is a major area of research in the field of coil launchers. Two types of coil launchers are the reluctance coil launcher and the induction coil launcher. Reluctance coil launchers use a ferromagnetic armature, which is generally smaller in diameter due to the armature’s magnetic saturation and higher density, while induction coil launchers use a conductive armature, which is generally larger in diameter. To improve the efficiency of coil launchers, this article proposes a hybrid armature structure for coil launchers in which the front end of the ferromagnetic armature is placed at the end of the coil and connected to the conductive armature by an insulating material half the length of the coil. To compare the efficiency of the hybrid armature with that of the original armature, three coil launchers of 11.8, 18.4, and 50 mm bore were selected to simulate the hybrid armature with different parameters and to verify the consistency of the simulation and experiment of the hybrid armature. The final results show that the efficiency of the ferromagnetic armature is better than that of the hybrid armature at 11.8 mm aperture. At 18.4 mm, the hybrid armature efficiency is 9.12%, an improvement of 4.08% compared to the original ferromagnetic armature. At 50 mm bore, at 1000 V, the optimum efficiency of the hybrid armature is 3.17%, an improvement of 2.73% compared to an aluminum armature of the same mass with load, at 2000 V, the optimum efficiency of the hybrid armature is 7.87%, an improvement of 5% compared to an aluminum armature of the same mass with load, and at 3000 V, the efficiency of the hybrid armature is lower than that of the aluminum armature directly with load. The findings provide new and effective ideas for improving the efficiency of coil launchers.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 8","pages":"3352-3359"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600226","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":"Two-Dimensional Particle-in-Cell/Monte Carlo Collisional Simulation of the Post-Arc Breakdown in Vacuum Circuit Breakers","authors":"Lijun Wang;Zhuo Chen;Dan Wang;Zhuoxi Lian;Zhiwei Wang;Runming Zhang","doi":"10.1109/TPS.2024.3449271","DOIUrl":"https://doi.org/10.1109/TPS.2024.3449271","url":null,"abstract":"Vacuum circuit breakers are widely used in medium-voltage power systems, and the post-arc breakdown is a key factor limiting performance of the vacuum circuit breakers. In this work, a 2-D particle-in-cell/Monte Carlo collisional model is developed to investigate the post-arc breakdown. The residual plasma, metal vapor, inhomogeneous temperature distribution and electron emission on the post-arc cathode surface and various collisions between charged particles, and metal vapor are taken into consideration in the model. Simulation results show that the post-arc breakdown initiates in the vicinity of the post-arc cathode center. At the moment when the post-arc breakdown occurs, a potential hump forms near the post-arc cathode center, and the plasma density increases by two orders, which are consistent with the published result obtained by 1-D hybrid simulation model. Simulation results on the effect of metal vapor density show that the post-arc breakdown occurs earlier with increasing metal vapor density, and the post-arc breakdown cannot occur when the metal vapor density is below 1020 m−3.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 8","pages":"3228-3236"},"PeriodicalIF":1.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600191","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}