2020 IEEE International Conference on Plasma Science (ICOPS)最新文献_第6页

Recent Progress of Pulsed-Power-Driven High Energy Density Physics in China 中国脉冲功率驱动高能量密度物理研究进展

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717447

Jian-jun Deng, W. Xie, Meng Wang, S. Feng, Hongtao Li, W. Zou, Lin Chen, Xianbin Huang, Zhaohui Zhang, Kun-lun Wang, Shao-tong Zhou, Qiang-Hua Xu, Le Xu, N. Ding, D. Xiao, C. Ning, Yang Zhang

引用次数: 1

Dynamics of Highly Energetic Electrons in Novel Accelerating Diodes 新型加速二极管中高能电子的动力学

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/icops37625.2020.9717440

Ben Crampsey, P. Macinnes, K. Ronald, A. Phelps

引用次数: 0

Laser-Induced Fluorescence Absolute OH Density and Gas Temperature Measurements in a Water Vapor Bubble Microsecond Discharge 水蒸汽泡微秒放电中激光诱导荧光绝对氢氧根密度和气体温度的测量

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/icops37625.2020.9717783

Jianan Wang, M. S. Simeni, P. Bruggeman

{"title":"Laser-Induced Fluorescence Absolute OH Density and Gas Temperature Measurements in a Water Vapor Bubble Microsecond Discharge","authors":"Jianan Wang, M. S. Simeni, P. Bruggeman","doi":"10.1109/icops37625.2020.9717783","DOIUrl":"https://doi.org/10.1109/icops37625.2020.9717783","url":null,"abstract":"Despite the extensive list of laser diagnostics capable of probing gas phase discharges, electrical discharges occurring inside bubbles in liquids have to date mainly been investigated by imaging and passive optical emission spectroscopy. In this paper, we report an investigation of a bubble discharge in liquid saline water using laser-induced fluorescence (LIF). Time-resolved absolute OH density and gas temperature are measured in the plasma-filled bubble. The reproducible discharge was generated by applying a microsecond voltage pulse to a needle electrode submerged in a NaCl-water solution with a conductivity of 50 mS/cm. The needle was located between two quartz slides with a gap distance of 2 mm. Due to the formation and subsequent growth of a vapor bubble becoming as large as 8 mm1 in the direction of the laser beam, the bubble occupies the entire gap and expands along the inner wall of quartz windows. During this bubble expansion, a UV laser beam around 282 nm was passed through the bubble and an ICCD camera with a narrowband filter (310–320 nm) was capturing the spatially resolved LIF signal along the laser beam. Absolute OH LIF signal calibration was obtained from Rayleigh scattering measurements on the same setup in gas phase.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117083057","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

Simulation and Experimental Verification of Multipactor In Parallel-Plate Microstipline Structure 平行板微细线结构多因子仿真与实验验证

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717538

M. Mirmozafari, N. Behdad, J. Booske

{"title":"Simulation and Experimental Verification of Multipactor In Parallel-Plate Microstipline Structure","authors":"M. Mirmozafari, N. Behdad, J. Booske","doi":"10.1109/ICOPS37625.2020.9717538","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717538","url":null,"abstract":"We have developed a comprehensive test setup for producing multipactor in a parallel-plate microstripline structure, with the goal of studying suppression strategies. This setup features broad frequency bandwidth, low-loss, high-power handling, adjustability, and flexibility to perform a wide range of multipactor experiments with different surface shapes and materials. We are able to conduct experiments from 0.1 to 1.2 GHz in ultra-high-vacuum or various gas fills. Multipactor growth will be detected by a sensitive current-detection probe and measurements of RF wave perturbation by the discharge plasma. The probe signal triggers a shut-down circuit, with an adjustable threshold, to turn off the RF power and limit the multipactor event time1. We have generated predictions of the multipactor susceptibility window (RF power vs frequency) using CST particle-in-cell simulations. The simulation predictions agree well with previously published theoretical model predictions2, We will experimentally validate the susceptibility window predictions, followed by experiments to suppress multipactor using either waveform modulations or modifications to the microstrip conducting surface.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117213141","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

Cold Test Analysis of W-Band Planar Interaction Structure Developed Using Micro Fabrication Techniques 利用微加工技术开发的w波段平面相互作用结构的冷试验分析

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717680

S. Jain, N. Gurjar, K. Singhal, Vishant, N. Kumar, A. Starodubov, N. Ryskin

{"title":"Cold Test Analysis of W-Band Planar Interaction Structure Developed Using Micro Fabrication Techniques","authors":"S. Jain, N. Gurjar, K. Singhal, Vishant, N. Kumar, A. Starodubov, N. Ryskin","doi":"10.1109/ICOPS37625.2020.9717680","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717680","url":null,"abstract":"Vacuum integrated technology has been a favorable choice for the generation of high frequency, high power radiation source because of their ability to handle high power in a compact size. W band (75GHz-110GHz) is considerably a high frequency band and with the increase in the frequency, the wavelength decreases which provides a limitation in developing structures with the desired machining tolerances and surface finish [1]–[3]. Machining tolerances and surface roughness are the important parameters for the propagation of RF signal and can considerably effect the characteristics performance of the vacuum tube [3]–[4]. In this paper a beam wave interaction structure for W-Band frequency has been fabricated in two halves by wire EDM micro fabrication technique and then both the parts were integrated to form a staggered double vane structure. An extensive study of SEM results of the fabricated structure accounts for the dimensional deviation of 10 microns. The interaction structure has a tapered region to ensure low impedance mismatch and better coupling with the WR-10 waveguide ports of VNA. Consequently, the fabricated structure was used to perform the cold test analysis. A waveguide casing was fabricated in accordance with dimensions of WR-10 waveguide for cold test analysis. The interaction structure was assembled inside the casing and connected with the VNA ports. The cold test analysis parameters like S11 and S12 are estimated to be less than −20 dB and near to 0 dB respectively.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124012792","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

Side-by-Side Comparison of Standard-Brick and Dry-Brick Pulser Configurations 标准砖和干砖脉冲发生器配置的并排比较

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717710

R. Shapovalov, R. Mcbride, R. Spielman, P. Gourdain

引用次数: 0

Influence of Nanosecond Repetitevely Pulsed Plasma Discharges on the Stability Limits of Premixed Methane Swirl Flames at Elevated Pressures 纳秒重复脉冲等离子体放电对高压预混甲烷旋流火焰稳定性极限的影响

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717768

F. Di Sabatino, T. Guiberti, W. Roberts, D. Lacoste

{"title":"Influence of Nanosecond Repetitevely Pulsed Plasma Discharges on the Stability Limits of Premixed Methane Swirl Flames at Elevated Pressures","authors":"F. Di Sabatino, T. Guiberti, W. Roberts, D. Lacoste","doi":"10.1109/ICOPS37625.2020.9717768","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717768","url":null,"abstract":"High-pressure premixed lean combustion is widely used in gas turbine engines to reduce pollutant emissions. One of the main challenges associated with this technology is the flame stabilization under lean conditions. Non-thermal plasma discharges have been extensively investigated as a way of stabilizing premixed flames in extremely-lean conditions at atmospheric pressure1. However, there is still a lack of understanding about the ability of this type of discharges to stabilize swirl flames at elevated pressures. This study investigates the influence of nanosecond repetitively pulsed (NRP) plasma discharges on the stability limits of premixed methane-air swirl flames at pressures up to 5 bar. The effects of two discharge regimes, NRP glows and NRP sparks, were analyzed. The voltage and the current of the discharge were measured and the influence of the discharge on the flame stabilization was assessed through direct images of the flames at 60 Hz. Carbon oxide (CO) emissions were also measured with a flue gas analyzer, with and without plasma discharges. Results demonstrated that NRP discharges improved stabilization of premixed swirl flames at elevated pressures even if the ratio of NRP discharge power to flame thermal power equal was 0.7% or less. It was also observed that the peak voltage required to maintain this very low power ratio did not increase linearly with increasing pressure. This was contrary to expectations because increasing pressure should result in a linearly decreasing reduced electric field. Moreover, the relative effectiveness of NRP glow and the NRP spark discharges to extend the flame stability limits changed by increasing pressure. Furthermore, the CO concentration in flue gases was reduced when NRP discharges were used to stabilize the flames. Improved flame stability and reduced CO emissions demonstrated the strong potential of utilizing NRP discharges in gas turbines.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126140745","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

Equivalent Dose of Atmospheric Plasma Jet on Inducing Cell Proliferation in Human Fibroblast Cell 等量大气等离子体射流诱导人成纤维细胞增殖的研究

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717576

S. Yap, M. Norhayati, S. Teow, S. S. Yap

引用次数: 0

Ultrafast Switchable Terahertz Polarization Conversion Modulator 超快可切换太赫兹偏振转换调制器

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717965

Jing Yin, F. Lan, Luyang Wang, Ziqiang Yang, Yaxin Zhang, Zongjun Shi, Wenxin Liu

引用次数: 0

A Compact G-Band Diplexer Based on Quasi-Elliptical Filter 基于准椭圆滤波器的紧凑型g波段双工器

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717806

Yinian Feng, Bo Zhang, Xiangyang Zhao, Jiale Wang

{"title":"A Compact G-Band Diplexer Based on Quasi-Elliptical Filter","authors":"Yinian Feng, Bo Zhang, Xiangyang Zhao, Jiale Wang","doi":"10.1109/ICOPS37625.2020.9717806","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717806","url":null,"abstract":"With the development of military and consumer electronics applications, the demand for high-data-rate wireless communications is growing synchronously. Terahertz bands, which have many advantages of large bandwidth, high penetration etc., are attractive in high-speed satellite data link, ultrashort-range interface of portable device, and wireless local area networks (WLANs)1. However, full-duplexer terahertz communication technology has rarely been reported, due to the lack of high-performance terahertz duplexers. To solve this problem, we propose a compact G-band diplexer based on quasi-elliptical filter. Through by-pass coupling, each filter generates a transmission zero in stop bands, which greatly improves the isolation between the two channels, reduces the guard band width, and improves the spectrum utilization. Two quasi-elliptic filters are connected by a T-junction to form the proposed diplexer. By using common junction as a part of filters, the optimization parameters are reduced and the simulation efficiency is greatly improved. Simulation results show that the proposed diplexer has a return loss greater than 15dB in channel 1(200-208GHz) and channel 2 (212-220GHz), and the isolation between the two channels is better than 50dB. This compact, high-isolation diplexer has great potential in G-band terahertz communication systems.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129403495","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