2019 IEEE Pulsed Power & Plasma Science (PPPS)最新文献_第4页

Auto-collimation and monitoring of laser beam in high power electron-pumped KrF laser facility 高功率电子泵浦KrF激光设备中激光束的自动准直与监控

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009688

Jing Li, Fengming Hu, Zhixing Gao, Zhao Wang, Baoxian Tian

引用次数: 1

Triggered Gas Switches for Use in Capacitor-Switch Assemblies for Ltd Technology 用于电容器开关组件的触发气体开关

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009894

I. Lavrinovich, D. Molchanov, D. Rybka, S. Vagaytsev, A. Erfort, A. Artemov, A. Lensky, A. Zhigalin

引用次数: 0

Wide Bandgap Photoconductive Switches Driven by Laser Diodes as a High-Voltage Mosfet Replacement for Bioelectrics and Accelerator Applications 激光二极管驱动的宽带隙光导开关作为生物电和加速器应用的高压Mosfet替代品

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009741

K. Sampayan, S. Sampayan

{"title":"Wide Bandgap Photoconductive Switches Driven by Laser Diodes as a High-Voltage Mosfet Replacement for Bioelectrics and Accelerator Applications","authors":"K. Sampayan, S. Sampayan","doi":"10.1109/PPPS34859.2019.9009741","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009741","url":null,"abstract":"The Optical Transconductance Varistor (OTV) represents a new class of photonically controlled, high-voltage power electronic device. It takes advantage of the bulk photonic properties of wide bandgap (WBG) materials, eliminating the traditional semiconductor control junction. Without drift region limitations, carrier excitation occurs on the order of picoseconds and in the bulk of the crystal; decay of the carriers is dependent on doping. Conductivity is therefore proportional to optical intensity so the device exhibits a transconductance-like property, in contrast to conventional photoconductive semiconductor switches (PCSS). The device is bidirectional and inherent optical isolation provides scalability in voltage and current capability. Recent testing demonstrated switching for bioelectric applications of kilovolt levels at 1 MHz repetition rate with a 10 ns rise time. A second device with a 50% duty cycle demonstrated operation at 20 kV and 2.5 A at over 125 kHz switching frequency. The OTV has use in pulsed power applications such as electroporation and accelerators and also in higher duty cycle cases such as power conversion for the electrical grid. Device background, present status and future development are set forth.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"13 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":"115640228","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

Pulsed Resonant Charging Power Supply for the Spallation Neutron Source Extraction Kicker PFN System 散裂中子源抽提器PFN系统的脉冲谐振充电电源

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009768

R. Saethre, B. Morris, V. Peplov

引用次数: 0

High Performance Triggering Transformer for Stack of Series Connected Thyristors 用于串联晶闸管堆叠的高性能触发变压器

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009655

V. Senaj, D. Pastor, T. Kramer

引用次数: 1

Cygnus Performance on Seven Subcritical Experiments Cygnus在七个亚临界实验中的表现

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009871

J. Smith, T. Romero, H. Truong, M. Garcia, E. Ormond, M. Parrales, P. Flores, K. Hogge, S. Huber, M. Misch, J. Pérez

{"title":"Cygnus Performance on Seven Subcritical Experiments","authors":"J. Smith, T. Romero, H. Truong, M. Garcia, E. Ormond, M. Parrales, P. Flores, K. Hogge, S. Huber, M. Misch, J. Pérez","doi":"10.1109/PPPS34859.2019.9009871","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009871","url":null,"abstract":"The Cygnus Dual Beam Radiographic Facility includes two identical radiographic sources - Cygnus 1 and Cygnus 2. Cygnus is the radiography source used in Subcritical Experiments (SCEs) at the Nevada National Security Site (NNSS). The machine specifications are: Electric 2.25 MV, 60 kA, 60 ns; Radiation 4 Rad, 1 mm, 50 ns; Operation single shot, 2-shots/day. Cygnus has operated at the NNSS since February 2004. In this period, it has participated on seven SCE projects - Armando, Bacchus, Barolo A, Barolo B, Pollux, Vega, and Ediza. SCE projects typically require over a hundred preparatory shots culminating in a single high-fidelity or SCE shot, and typically take over a year for completion. Therefore, SCE shots are high risk and high value making reliability and reproducibility utmost priority. In this regard, major effort is focused on operational performance. A quantitative performance measurement is valuable for tracking and maintaining Cygnus preparedness. In this work, we present a new model for analysis of Cygnus performance. This model uses x-ray dose distribution as the basis for calculation of Reliability, Record, and Reproducibility. It will be applied both to long-term (historical) and short-term (readiness) periods for each of the seven SCEs.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"36 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":"122765373","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

Low-Impedance S-Band MILO 低阻抗s波段MILO

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009939

M. Abide, T. Buntin, D. Barnett, J. Dickens, R. Joshi, A. Neuber, J. Mankowski

{"title":"Low-Impedance S-Band MILO","authors":"M. Abide, T. Buntin, D. Barnett, J. Dickens, R. Joshi, A. Neuber, J. Mankowski","doi":"10.1109/PPPS34859.2019.9009939","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009939","url":null,"abstract":"The development of a low-impedance magnetically insulated transmission line oscillator (MILO) driven by a compact Marx generator developed by Texas Tech University is discussed. The goals of the project aim to develop a MILO operating within the S-Band that can provide an RF peak output power of greater than 1 GW with greater than 10% efficiency. The device design followed a set of base design equations that were applied to a CST Studio Suite (CST) for a Particle-in-Cell, PIC, simulation to model the MILO. These simulation results then inform changes to the model to optimize the prospective performance of the device. The simulations were developed to account for realistic material properties that were then applied to critical surfaces of the device. Additionally, a circuit simulation was included to model a Marx generator feeding the input of the MILO to simulate the eventual experimental setup. Current results verify an expected RF peak power of approximately 4.5 GW at 2.5 GHz operating in the TM01 mode when excited with an input signal that has a peak voltage of 600 kV while providing a peak current of 58 kA. The simulation confirms the design should perform within these constraints.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"95 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":"126145391","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

Design and Performance of a 4 mv, 14 kj Marx Generator 4mv, 14kj马克思发电机的设计与性能

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009944

J. Mayes, C. Hatfield, J. Byman, D. Kohlenberg, P. Flores

引用次数: 0

Advanced Ultra-High Voltage NanoDielectric Capacitor Development, Fabrication, and Testing 先进的超高压纳米介电电容器的开发，制造和测试

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009727

S. Dickerson, R. Curry, L. Brown, S. Mounter, A. Maddy, J. T. Camp

{"title":"Advanced Ultra-High Voltage NanoDielectric Capacitor Development, Fabrication, and Testing","authors":"S. Dickerson, R. Curry, L. Brown, S. Mounter, A. Maddy, J. T. Camp","doi":"10.1109/PPPS34859.2019.9009727","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009727","url":null,"abstract":"The Center for Physical and Power Electronics has developed a nanodielectric material (MU100) to reduce the size of ultra-high voltage (UHV) pulsed power capacitors. In the discharge regime of interest, the dielectric constant of the material is 200. The UHV dielectric, 3.4 cm diameter, 2 cm thick substrates with voltage ratings on the order of 260 kV, were assembled into a series stack of 4 each using a eutectic solder. Nine of these encapsulated capacitors were paralleled in a modular 130 pF capacitor assembly, and physically tested for operational capability. Results of the development and testing demonstrated two full-scale devices capable of withstanding over 104, 500 kV pulses with 55% voltage reversal, showing no signs of degradation; exceeding all pre-specified performance specifications. The test capacitor was part of a peaking circuit placed at the output of a 15 stage compact Marx bank to achieve the voltage amplitudes and reversals to meet the performance specifications. The capacitor was subjected to continuous 2-second bursts of 100 Hz repetition rate pulses with 10 seconds between bursts, which was required for the thermal management of the Marx bank. The submodules demonstrated a thermal rise of less than three degrees centigrade during continuous operation over a 15 minute test period. Further testing of the capacitor sub-modules demonstrated reliable performance under pulses of greater than 1 MV at a lifetime of 103 pulses. The smaller capacitance of the submodules allowed for voltage doubling across the test capacitor when connected to the 15 stage Marx bank through a charging inductor. The capacitor submodule was subjected to 2-second bursts of 100 Hz repetition rate pulses with 6 seconds between bursts. The results of the ultra-high voltage capacitor tests are discussed as well as the impact of the technology for compact pulsed power applications.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"33 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":"128387412","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

Aggregation Inhibition of Nanoparticle Dispersion by Nonthermal Plasma Irradiation 非热等离子体辐照对纳米颗粒分散的聚集抑制作用

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI: 10.1109/PPPS34859.2019.9009774

K. Suenaga, Ayumu Hyodo, Y. Kawamura, Douyan Wang, T. Namihira

{"title":"Aggregation Inhibition of Nanoparticle Dispersion by Nonthermal Plasma Irradiation","authors":"K. Suenaga, Ayumu Hyodo, Y. Kawamura, Douyan Wang, T. Namihira","doi":"10.1109/PPPS34859.2019.9009774","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009774","url":null,"abstract":"The nonthermal plasma has a high chemical reactivity and a characteristic that the temperature of the ion and the neutral particle are relatively low as from room temperature to several hundreds of degrees. Utilizing these features, we are developing applications in the environmental field such as ozone generation, exhaust gas treatment, air cleaning, etc. In recent years, researches directed toward application to medical fields such as sterilization, dental treatment, wound care are actively conducted. Nanoparticles have received much attention in recent years due to its remarkable properties, which offer important economic benefits and have been used in diverse application. However, their property gradually decays because of aggregation, which means that adhesion between nanoparticles. To maintain high performance of nanoparticles in liquid requires a technique which maintains dispersion. Examples of conventional dispersion techniques include a bead mill, an ultrasonic homogenizer, a dispersant, and so on. Due to the disadvantages of conventional dispersion technologies, research on new dispersion technology has been conducted to solve these problems. In this study, we show the experimental result that aggregation of metal oxide nanoparticle dispersion which charged positively was suppressed by irradiating nonthermal plasma. We used nanoparticles of ZrO2 and ZnO, ZrO2 is positively charged in aqueous solution, whereas ZnO is negatively charged in aqueous solution. We compared with dispersion lifetime of two metal oxide nanoparticle dispersions that were irradiated with plasma. The result was ZrO2 dispersion could extend the lifetime, but not ZnO dispersion. These results suggest that OH radical affects the surface hydroxyl group to change the charged state.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"16 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":"127258894","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