2019 IEEE Pulsed Power & Plasma Science (PPPS)最新文献

Characteristics of negative-polarity DC superimposed nanosecond pulsed discharge and its applications 负极性直流叠加纳秒脉冲放电特性及其应用

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009784

H. Yamashita, Y. Torigoe, D. Wang, T. Namihira

{"title":"Characteristics of negative-polarity DC superimposed nanosecond pulsed discharge and its applications","authors":"H. Yamashita, Y. Torigoe, D. Wang, T. Namihira","doi":"10.1109/PPPS34859.2019.9009784","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009784","url":null,"abstract":"Non-thermal plasma generated by pulsed discharge is expected to efficiently treat combustion exhaust gases such as nitrogen oxide (NOx) and sulfur oxide (SOx) due to its high chemical activity. Nanosecond pulsed discharge which has voltage rise time and fall time of 2 ns, pulse width 5 ns and peak value of 60 kV, has been developed by our group. Nanosecond pulsed discharge mainly consists of streamer discharge phase, so that heat loss which caused by glow discharge is less, and plasma impedance is kept almost constant during the streamer discharge phase. Therefore, impedance matching between pulsed power supply and discharge load is possible. Applications on ozone generation and NO treatment using nanosecond pulsed discharge are reported with high energy efficiency compared to other discharge methods. However, the discharge mode transit to arc discharge phase sometimes. Also, for industrial applications, the plasma processing capacity leaves room to improve. It has also been reported that negative polarity nanosecond pulse discharges give better results depending on the plasma processing applications. In this study, negative polarity DC superimposed nanosecond pulsed discharge was suggested in order to improve the better performance of the nanosecond discharge plasma. Results of ozone generation using negative polarity DC superimposed nanosecond pulsed discharge have also been introduced.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121071247","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

High-Speed Imaging of Polymer-Bonded Explosives under Mechanical Stresses 机械应力下聚合物粘结炸药的高速成像

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009758

R. Lee, E. Tucker, A. Neuber, A. Hewitt, R. Clark, H. Hudyncia, T. Buntin, D. Barnett, J. Dickens, J. Mankowski, W. A. Harrison

引用次数: 0

Modernization of the Marx and Rimfire Triggering Systems for the HERMES-III Accelerator 赫尔墨斯- iii加速器马克思和Rimfire触发系统的现代化

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009893

C. Grabowski, J. Santillanes, A. Shay, B. Smart, G. Tilley, K. Tunell, N. Joseph, S. Coffey, G. Archuleta, E. Gutierrez, B. Hughes, J. Lott, R. Natal, I. Owens

{"title":"Modernization of the Marx and Rimfire Triggering Systems for the HERMES-III Accelerator","authors":"C. Grabowski, J. Santillanes, A. Shay, B. Smart, G. Tilley, K. Tunell, N. Joseph, S. Coffey, G. Archuleta, E. Gutierrez, B. Hughes, J. Lott, R. Natal, I. Owens","doi":"10.1109/PPPS34859.2019.9009893","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009893","url":null,"abstract":"HERMES III is a 20-MeV linear induction accelerator that was constructed at Sandia National Laboratories in the late 1980's and continues operation to this day. The accelerator utilizes 10 Marx banks for its initial energy storage and pulse formation. These Marx banks discharge their energy into 20 intermediate storage capacitors which, in turn, feed 80 pulse forming lines that further condition the pulse. Transmission line feeds from the pulse forming lines then deliver the electrical energy to 20 induction cavities arrayed along the axis of the machine to build the final output pulse along a central magnetically insulated transmission line (MITL). There are two triggering systems within the accelerator that work together in this energy discharge process. One simultaneously triggers the initial discharge of energy from each of the 10 Marx banks; the other staggers the triggering of the Rimfire gas switches following each intermediate storage capacitor so as to properly synchronize the energy delivery to the downstream cavities and the MITL with the pulse propagation along the MITL. Until recently, these triggering systems were the original systems dating back to the initial commissioning of the accelerator, however both have now been replaced with new and more modernized systems. Design details for both triggering systems will be presented, along with an overview of some of the initial operational data from the HERMES III accelerator using these new triggering systems.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126186829","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

Low-Inductance Load Test of a New 250-Ka, 150-Ns Pulser for Fast X-Pinch Sources 用于快速x点夹源的新型250-Ka, 150-Ns脉冲发生器的低电感负载测试

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009748

R. Shapovalov, M. Adams, M. Evans, H. Hasson, J. Young, I. West-Abdallah, P. Gourdain

{"title":"Low-Inductance Load Test of a New 250-Ka, 150-Ns Pulser for Fast X-Pinch Sources","authors":"R. Shapovalov, M. Adams, M. Evans, H. Hasson, J. Young, I. West-Abdallah, P. Gourdain","doi":"10.1109/PPPS34859.2019.9009748","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009748","url":null,"abstract":"X pinches are well-known sources for point-projection radiography: given the right conditions, they generate very bright, x-ray bursts launched from a very small, dense plasma source. To improve the performance of x pinches, a compact pulser was built at the University of Rochester. The pulser is simplified Linear Transformer Driver: it consists of 5 LTD bricks (which is two capacitors and high-current switch all are connected in series) directly coupled to the transmission line, with bricks hanging from the transmission line rather than positioned radially outward, as it is the case in usual LTD designs. The pulser can store up to 4-kJ of initial energy when charged to ±100 kV, and simulations predict it can deliver up to 300-kA of peak current into an inductive x-pinch load with less than 150-ns time-to-peak. In this paper we present short-circuit measurements of the pulser. The load is 2.54-cm-long, 9.6-cm-diameter metal cylinder installed in the anode-cathode gap with inductance of only 1.13 nH. The current oscillations into this load allow us to directly measure the driver internal inductance and resistance. The data is compared to the Screamer simulations.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125331429","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: 2

Operation of a Gyromagnetic Line with Magnetic Axial Bias 具有磁轴偏置的陀螺磁力线的运行

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009907

F. S. Yamasaki, J. O. Rossi, Leandro C. Silva, E. Rangel, E. Schamiloglu

{"title":"Operation of a Gyromagnetic Line with Magnetic Axial Bias","authors":"F. S. Yamasaki, J. O. Rossi, Leandro C. Silva, E. Rangel, E. Schamiloglu","doi":"10.1109/PPPS34859.2019.9009907","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009907","url":null,"abstract":"A growing interest has been raising around the use of nonlinear transmission lines (NLTLs) for radiofrequency (RF) generation since recent results published has demonstrated great prospects for this application. The subject of this paper is about a continuous ferrite loaded nondispersive line known as a gyromagnetic nonlinear transmission line (GNLTL), biased by an axial magnetic field. This type of transmission line has demonstrated a high RF conversion efficiency (up to 20.0%), showing a good capability of operation in a broader frequency range, between 300 MHz and 6.0 GHz. Several authors used different approaches to study the gyromagnetic effect to understand the precession movement of the ferrite magnetic dipoles. The model proposed and studied here to analyze the GNLTL has a coaxial structure using NiZn ferrite beads distributed in a 20-cm coaxial line at a high voltage operation. Signal results were compared to check the influence of a solenoid on the axial magnetic bias. This paper explores the oscillations generated at the output caused by the changes in the magnetic system setup. It is expected that the discussion presented here will be useful as a basis to develop a new system capable of generating RF for mobile defense platforms.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115459225","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

Low Energy Electron Irradiation Induced Charging of Dielectric Materials: Measurements and Analyses 低能电子辐照诱导介电材料带电:测量与分析

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009953

M. Belhaj, S. Dadouch

引用次数: 2

Impedance Characteristics of Metal Oxide Varistor under Different Pulses 不同脉冲下金属氧化物压敏电阻的阻抗特性

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009983

Wei Zhang, Jie Guo

{"title":"Impedance Characteristics of Metal Oxide Varistor under Different Pulses","authors":"Wei Zhang, Jie Guo","doi":"10.1109/PPPS34859.2019.9009983","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009983","url":null,"abstract":"In this paper, the metal oxide is determined according to the characteristics of the very fast transient overvoltage (VFTO) waveform measured in the gas-insulated metal-enclosed switchgear (GIS) according to the standard regulations. The waveform parameters of the metal oxide varistor (MOV) test platform were designed to build pulse generators with 8µs, 100ns and 20ns wave-heads. Several typical MOVs for 110kV and 220kV system arresters were selected as samples. The impedance characteristics and response characteristics of MOV under the pulse of the above three different wave-head times are studied. The experimental results show that under the pulse of 8µs and 100ns with different amplitudes, the MOV voltage reaches the peak value and shows the inductance characteristics. The MOV under 20ns pulse shows different impedance characteristics. There is an impedance characteristic transition voltage U0, and at U0 voltage, the MOV shows resistivity. When the voltage peak on the MOV is less than U0, the current reaches the peak before the voltage, and the MOV mainly shows the capacitance characteristic. When the voltage peak on the MOV is greater than U0, the voltage reaches the peak before the current, and the MOV mainly shows the inductance characteristic. Under 8µs pulse, the time when the voltage and current on the MOV reach the peak value differ by 2.4µs; Under 100ns pulse, the time when the voltage and current on the MOV reach the peak value differ by 1µs; Under 20ns pulse, the time when the voltage and current on the MOV reach the peak value differ by less than 11ns. The shorter the wave-head time of the pulse, the smaller the difference between the time of the voltage and current peak value.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114291087","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

Plasma Simulation and Modeling of Pseudospark Discharge for High Density and Energetic Electron Beam Generation 高密度高能电子束产生伪火花放电的等离子体模拟与建模

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009933

Varun, P. Shukla, A. Cross, K. Ronald, U. Pal

引用次数: 0

Single-step Synthesis of Molybdenum Carbide Nanoparticles by Wire Explosion Process 线爆法单步合成碳化钼纳米颗粒

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009872

P. Ranjan, R. Sarathi, Ramkishore Kumar, P. Selvam, R. Jayaganthan, H. Suematsu

引用次数: 0

Electro-Optical Measurement of Electric Fields for Pulsed Power Systems 脉冲电源系统电场的电光测量

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009987

I. Owens, C. Grabowski, N. Joseph, S. Coffey, B. Ulmen, D. Kirschner, K. Rainwater, K. Struve

引用次数: 2