2021 IEEE Pulsed Power Conference (PPC)最新文献_第4页

Simulation of Streamer Discharges Across Solid Dielectric Surfaces Using the Open-Source FEniCS Platform 基于开源FEniCS平台的固体介质表面流光放电模拟

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733158

T. Wong, I. Timoshkin, S. Macgregor, M. Wilson, M. Given

{"title":"Simulation of Streamer Discharges Across Solid Dielectric Surfaces Using the Open-Source FEniCS Platform","authors":"T. Wong, I. Timoshkin, S. Macgregor, M. Wilson, M. Given","doi":"10.1109/PPC40517.2021.9733158","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733158","url":null,"abstract":"Modelling the development of streamer discharges across gas-solid dielectric interfaces is of increasing importance to the power and pulsed power industries. Deeper understanding of the dynamics and morphology of fast ionisation fronts in gases and at gas-solid interfaces underpins insulation coordination and optimization in high voltage power and pulsed power systems. However, many physical mechanisms behind gas-solid flashover remain to be fully understood. In this work, an adaptive mesh drift diffusion solver implemented on the open-source finite element framework FEniCS is used to perform computational streamer modelling across gas-solid interfaces. In this study, we verify our implementation by performing studies under a published configuration of a positive streamer initiating and propagating along a flat dielectric surface in a 2D domain. FEniCS is proved fully capable of performing streamer simulations in complex gas-solid topologies, with our results providing further evidence of accelerated surface streamers and other observed effects under various initial seed positions, surface permittivity, and applied voltage magnitudes.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124558504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Progress in development of pulsed resonant charging power supply for the Spallation Neutron Source extraction kicker PFN system 散裂中子源抽提器PFN系统脉冲谐振充电电源的研制进展

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733159

V. Peplov, C. Pappas, R. Saethre, Y. Tan

引用次数: 0

A Multi-Term Boltzmann Equation Toolset for Low Temperature Plasmas 低温等离子体多项玻尔兹曼方程工具集

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733141

Max Flynn, A. Neuber, J. Stephens

{"title":"A Multi-Term Boltzmann Equation Toolset for Low Temperature Plasmas","authors":"Max Flynn, A. Neuber, J. Stephens","doi":"10.1109/PPC40517.2021.9733141","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733141","url":null,"abstract":"Low temperature plasma (LTP) models, such as fluid and global models, frequently rely on Boltzmann equation (BE) solvers for the fast calculation of rate and transport coefficients from cross section data. While multi-term BE solvers currently see strong support in the kinetic modeling community, two-term BE solvers remain the preferred choice in the greater pulsed power and plasma science community. The limitations of the two-term approximation are well known, yet it is still regularly assumed that the two-term approximation is suitable for applications in LTP models. Recent studies have demonstrated otherwise where, even in a simple 1D fluid model, the use of multi-term derived rate and transport coefficients yielded superior fluid model results compared to the same model using two-term derived rate and transport coefficients.Much of the reluctance in adopting multi-term BE solvers may be attributed to a lack of publicly available tools. Here, we report on the public release of MultiBolt v3.0.0 as a free and open-source C++ header library as well as its pre-compiled terminal-based executable and graphical user interface. We also report on the inclusion of new functionality in temperature dependence, superelastic collisions, and the object-oriented treatment of both discrete and analytic cross sections.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130116724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

High Power Multipactor Suppression in X-Band Waveguide x波段波导中的高功率多因素抑制

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733122

A. Gregory, Z. Shaw, D. Wright, J. Mankowski, J. Dickens, A. Neuber

引用次数: 1

Linear pulse transformer with pulse repetition up to 5 Hz 脉冲重复频率高达5赫兹的线性脉冲变压器

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733127

V. Alexeenko, A. Zherlitsyn, S. Kondratiev

引用次数: 0

Design of 3He Solenoid Power Supply at BNL BNL 3He电磁电源的设计

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733120

Y. Tan

引用次数: 0

Armature Technologies and Launching Capability of Electromagnetic Railgun Launcher with Monolithic U-shaped Aluminum Armature 整体式u型铝电枢电磁轨道炮发射装置的电枢技术与发射性能

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733053

Q. Lv, Chunyan Liang, Xi-chao Yuan, Zhiming Qiao, Bin Lei, Hong-jun Xiang

{"title":"Armature Technologies and Launching Capability of Electromagnetic Railgun Launcher with Monolithic U-shaped Aluminum Armature","authors":"Q. Lv, Chunyan Liang, Xi-chao Yuan, Zhiming Qiao, Bin Lei, Hong-jun Xiang","doi":"10.1109/PPC40517.2021.9733053","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733053","url":null,"abstract":"The progress and limitation of launching capability for an electromagnetic railgun launcher were analyzed referring to the armature technologies. The monolithic U-shaped aluminum armature could be used to launch efficiently a projectile to 2.5-km/s hypervelocity owing to such nine aspects of characteristics as low density, high conductivity, low specific heat, suitable melting point, low melting heat, high mechanical strength, U shape to undertake the interference fit between rail/armature sliding interfaces, U shape to conduct longitudinal current, U shape to distribute current to try to avoid local gathering. The reliable sliding electric contact between rail/armature was well controlled to depress friction, abrasion, transition to discharge erosion, gouging, and grooving. However, such four aspects of characteristics as the heavy pulse current of MA magnitude, the current gathering on the concave surface of U-shaped armature, the local Ohmic heat to melting, and the magnetic saw effect did limit the launching capabilities of an electromagnetic railgun launcher with a monolithic U-shaped aluminum armature. The simulation results showed that the muzzle momentum had a limited value of about 15 kg × 2.5 km/s for a railgun launcher. The results reached were: the monolithic U-shaped aluminum armature could successfully launch a 15-kg projectile to 2.5 km/s; The evaluation index of the launching capabilities for an electromagnetic railgun launcher was the muzzle momentum, not the muzzle velocity or the muzzle kinetic energy, owing to magnetic saw to break the armature; a kind of double-layered U-shaped aluminum armature might help to launch a 60-kg projectile to 2.5-km/s velocity.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid Capacitor Charger with Advanced Digital Control 快速电容器充电器与先进的数字控制

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733157

M. Giesselmann, J. Mayes

引用次数: 1

Development of a Dynamic Arbitrary Current Source for Power-HiL Simulations and HVDC Breaker Characterization 用于功率- hil仿真和高压直流断路器特性的动态任意电流源的开发

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733146

G. Tsolaridis, J. Biela

{"title":"Development of a Dynamic Arbitrary Current Source for Power-HiL Simulations and HVDC Breaker Characterization","authors":"G. Tsolaridis, J. Biela","doi":"10.1109/PPC40517.2021.9733146","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733146","url":null,"abstract":"In this paper, the focus is on the DynACuSo, a dynamic arbitrary current source, with a modular design. The source aims to fulfill a list of specifications that arise from a wide range of applications, and explore performance boundaries in terms of output ripple and dynamic. The DynACuSo is a second-generation arbitrary current source with a peak current of 1.5 kA, a continuous current of 1 kA, and a bipolar output voltage of up to ±10 kV. It can also generate current gradients above 10 A µs−1 through a wide range of loads, and a low flattop ripple below 500ppm. The topology and operation principle of the source are discussed and models to derive the maximum theoretical potential of the system are established. Furthermore, the advanced control system that enables the utilization of the full potential of the topology is presented. Finally, experimental results with a prototype system verify the concept. The measurements show the ability of the source to generate current gradients that exceed 15 A µs−1 and a current ripple of some tens of mA. Experimental measurements also show the ability of the source to generate complex current waveforms, with very short current rise/fall times with a DC-arc as a load. The result opens new potential research opportunities for further DC-arc investigations and verifies the applicability of the source in the field of Power-HiL simulations.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130570350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on OFC electron beam welding joints in a Boat Shape RF cavity 船形射频腔中OFC电子束焊接接头的研究

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733118

Yin-Long Xing, Jiefeng Wu, S. Pei, Zhihong Liu, Li Bo, Wei Wen, Jia Tao, Jianguo Ma

引用次数: 1