Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.最新文献_第2页

Electrical insulation RF breakdown in space environment 空间环境下电绝缘射频击穿

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189507

H. Kirkici

引用次数: 0

The magnetic flux compression scheme as a power amplification & pulse shaping stage 磁通压缩方案作为功率放大和脉冲整形阶段

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189485

M. Bavay, P. L’eplattenier, C. Mangeant, F. Hamann, M. Mazarakis, P. Monjaux, F. Lassalle, G. Avrillaud, B. Lallé

引用次数: 2

Gigawatt S-band frequency-tunable HPM sources 千兆瓦s波段频率可调HPM源

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189462

S. Korovin, I.K. Kurkan, I. Pegel, S. Polevin

引用次数: 3

Pulsed corona generation using a high-power semiconductor diode switch 使用大功率半导体二极管开关产生脉冲电晕

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189451

A. Pemen, I. Grekhov, E. V. van Heesch, K. Yan, S. Nair, S. Korotkov

{"title":"Pulsed corona generation using a high-power semiconductor diode switch","authors":"A. Pemen, I. Grekhov, E. V. van Heesch, K. Yan, S. Nair, S. Korotkov","doi":"10.1109/MODSYM.2002.1189451","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189451","url":null,"abstract":"High-power semiconductor opening switches are the most critical components in nanosecond pulsed power systems with inductive energy storage. For industrial applications, such as pulsed corona processing, a long lifetime, high repetition rate, high efficiency and high reliability are required. At the Ioffe Institute, an unconventional switching mechanism has been found, based on the very fast recovery process in a silicon p/sup +/p'nn/sup +/ diode. This paper describes the application of such a 'drift-step recovery diode' for high-power pulsed corona plasma generation. The principle of the diode-based nanosecond pulse generator is discussed in detail. The generator is coupled to a wire-plate corona reactor via a transmission-line-transformer, which has the following advantages: (i) increase of the output voltage, (ii) impedance transformation to improve the matching with the reactor, (iii) protection of the switch against reflections and mismatches, (iv) limitation of the switch current during short-circuit or breakdowns, and (v) easy coupling with a DC-bias voltage. The developed circuit has been tested at both a matched resistive load and a wire-plate pulsed corona reactor. Various ways to improve the matching with the reactor have been evaluated. We found that superposition of the pulse on a DC-bias voltage gives the best result. For example: without DC-bias, more than 50% of the energy-per-pulse reflects back to the source. However, the reflected energy could be reduced to <15% when using a DC-bias voltage of 25 kV.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128505454","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

Average 120-kW MPC modulator for plasma de-NO/sub x//de-SO/sub x/ system 平均120千瓦的MPC调制器用于等离子体去no /sub x//de-SO/sub x/系统

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189546

J. Oh, S. Jang, Y. Son, M. Cho, W. Namkung, D. Koh

引用次数: 0

Development and characterization of diamond-coated photoconductive switches for stacked Blumlein pulsers 叠置Blumlein脉冲用金刚石涂层光导开关的研制与表征

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189447

F. Davanloo, C. B. Collins

引用次数: 1

High power battery tester development 大功率电池测试仪开发

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189465

P. Butler, L. Moya, D. Reichman, R. Ripple, F. Peterkin

引用次数: 1

Compact system for ceramics joining using explosive interlayer metal foil 使用爆炸性层间金属箔的陶瓷连接紧凑系统

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189542

I. Takaki, Y. Takada, M. Itagaki, S. Mukaigawa, T. Fujiwara, S. Ohshima, K. Oyama, I. Takahashi, T. Kuwashima

引用次数: 1

Nanosecond pulsed electric field effects on human cells 纳秒脉冲电场对人体细胞的影响

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189562

S. Beebe, P. Fox, L. Rec, L. Willis, K. Schoenbach

{"title":"Nanosecond pulsed electric field effects on human cells","authors":"S. Beebe, P. Fox, L. Rec, L. Willis, K. Schoenbach","doi":"10.1109/MODSYM.2002.1189562","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189562","url":null,"abstract":"Electric fields have been used on intact cells for decades, most notably for effects on plasma membranes for cell fusion and transient electroporation to allow the entry of xenomolecules. Compared to electroporation pulses, new pulse power technology generates non-thermal pulses with shorter durations and higher electric fields (nsPEF) such that the charging time of the plasma membrane is not reached, but subcellular membranes and intracellular functions are affected independent of heating. Here we investigated nsPEF-induced programmed cell death (apoptosis) in intact human cells with pulse durations between 10-300 nanoseconds over a range of electric field intensities and energy densities. nsPEF effects are observed on the plasma membrane integrity and caspase activation using fluorescent markers, flow cytometry, biochemical assays. The results indicate that once a critical electric field intensity threshold is reached, nsPEF-induced apoptosis is dependent on the pulse duration and is independent of the electric field intensity. Relatively long pulses (300 ns), which have greater plasma membrane effects and lesser intracellular effects, recruit apoptosis mechanisms that rapidly advance through apoptosis to loss of membrane integrity in minutes. Shorter pulses (10 ns), which have greater intracellular effects and lesser plasma membrane effects, induce apoptosis, but require longer times (tens of minutes to hours). We conclude that nsPEF-induced apoptosis does not require plasma membrane effects related to electroporation. nsPEF affect a continuum of cellular mechanisms from the plasma membrane to intracellular targets. Longer pulses recruit multiple and perhaps synergistic pathways while shorter pulses recruit more time-dependent pathways. These studies promote a better understand of the effects of nsPEF on basic functions during cellular responses to intrinsic and extrinsic stresses and suggest the potential for nsPEF applications for therapeutic purposes.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115320252","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: 14

Bacterial decontamination with nanosecond pulsed electric fields 用纳秒脉冲电场净化细菌

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189561

S. Katsuki, K. Moreira, F. Dobbs, R. Joshi, K. Schoenbach

{"title":"Bacterial decontamination with nanosecond pulsed electric fields","authors":"S. Katsuki, K. Moreira, F. Dobbs, R. Joshi, K. Schoenbach","doi":"10.1109/MODSYM.2002.1189561","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189561","url":null,"abstract":"In order to explore the effect of pulsed electric fields (PEF) with pulses, which are of the order of the charging time of bacterial membranes, we have studied the effect of 45 ns pulses on the viability of bacillus subtilis (ATCC6051) in its vegetative state. The treatment chamber consists of two parallel metal plates with the separation of 2.2 mm and an insulating housing, made of PTFE. A 30 /spl Omega/ Blumlein generator with a low inductance spark gap switch delivers square wave voltage pulses of 45 ns duration to the electrodes of the bacterial treatment chamber. The parameters varied for this study were the resistivity of the medium and the risetime of the pulse. PEF was found to be more effective in media with low resistivity. The risetime, which was varied from 2 ns (f<200 MHz) to 20 ns (f<50 MHz), determines the high frequency components in the Fourier spectrum of the pulse. With pulses of different rise time, but same total energy, the pulse with short rise time kills bacteria more effectively. These results indicate that the high frequency components in PEF deposit the electrical energy in the cell and affect intracellular structures.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116560213","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: 26