2011 IEEE Pulsed Power Conference最新文献_第6页

Circuits for digitally synthesizing very long HPM pulses in compact geometry 数字合成超长紧凑几何HPM脉冲的电路

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191567

O. Zucker

引用次数: 0

Gene expression analysis of apoptosis pathway in HeLa S3 cells subjected to nanosecond pulsed electric fields 纳秒脉冲电场作用下HeLa S3细胞凋亡途径的基因表达分析

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191588

M. Yano, K. Abe, S. Katsuki, H. Akiyama

引用次数: 3

Development of a boost converter topology for a high repetition pulsed power generator 高重复脉冲功率发生器升压变换器拓扑结构的研究

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191610

A. Nami, T. Sakamoto, M. Akiyama, H. Akiyama

引用次数: 0

Recombination lifetime modification in bulk, semi-insulating 4H-SiC photoconductive switches 半绝缘4H-SiC光导开关复合寿命的改进

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191652

C. Hettler, W. Sullivan, J. Dickens

{"title":"Recombination lifetime modification in bulk, semi-insulating 4H-SiC photoconductive switches","authors":"C. Hettler, W. Sullivan, J. Dickens","doi":"10.1109/PPC.2011.6191652","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191652","url":null,"abstract":"A series of high temperature annealing experiments were performed to characterize the processing parameters that alter the recombination lifetime in high purity, semi-insulating (HPSI) silicon carbide (SiC). All annealed samples were diced from a single 4H-SiC wafer with a measured resistivity of greater than 109 Ω-cm. The samples were annealed for various lengths of time in a PID-controlled high temperature induction furnace at 1810 °C. A 35 GHz microwave photoconductivity decay (MPCD) system was used to measure the transient photoconductivity of the as-grown and processed samples. Through numerical processing of the temporal characteristics of the illuminating laser pulse, the photoconductivity transients were simulated with various recombination lifetimes to fit the experimental MPCD data. The results show that the as-grown material has an average recombination lifetime of 6 ns. However, samples annealed for more than 100 minutes demonstrated recombination lifetimes in excess of 100 ns. The annealing process reduces the concentration of shallow point defects (Z1/Z2) in the bulk material which serve as recombination centers in HPSI 4H-SiC, extending the carrier lifetime. Finally, the impacts of increased recombination lifetime in photoconductive switch operation and performance are presented and discussed.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125493756","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: 4

Modeling and characterization of VSCF aircraft electric power systems with nonlinear loading 非线性载荷下VSCF飞机电力系统的建模与表征

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191668

H. El-kishky, H. Ibrahimi, M. Abu Dakka, A. Eid, M. Abdel-Akher

引用次数: 8

Design of a novel multi-output synchronous trigger generator for linear transformer driver 一种用于线性变压器驱动器的新型多输出同步触发发生器的设计

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191553

Y. Lei, Kefu Liu, J. Qiu

引用次数: 4

A Finite-Difference time-domain simulation of formative delay times of plasma at high RF electric fields in gases 气体中高射频电场下等离子体形成延迟时间的时域有限差分模拟

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191415

P. Ford, H. Krompholz, A. Neuber

{"title":"A Finite-Difference time-domain simulation of formative delay times of plasma at high RF electric fields in gases","authors":"P. Ford, H. Krompholz, A. Neuber","doi":"10.1109/PPC.2011.6191415","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191415","url":null,"abstract":"A Finite Difference (FD) algorithm was developed to calculate the formative delay time between the application of an RF field to a dielectric surface and the formation of a field-induced plasma interrupting the RF power flow. The analysis is focused on the surface being exposed to a background gas pressure above 50 torr. The FD-algorithm is chosen over particle-in-cell methods due to its higher computational speed and its ease of being ported to commercial electromagnetics solvers. The dynamic frequency-dependent permittivity of the plasma is mapped to the time domain of the FD algorithm using the Z transform. Therefore, together with the electron density, the effect of the developing plasma on the instantaneous microwave field is calculated. The high observed value of absorption, up to 60 %, is a result of the momentum transfer collision frequencies in the developing plasma being much larger than the microwave frequency. As a result, the electron density increases to values well beyond the density calculated from setting a plasma frequency equal to the microwave frequency. In the experiment, flashover is induced across a Lucite window by a 4 MW S-band magnetron operating at 2.85 GHz with ∼ 50 ns rise time. The results of the FD simulation are compared with experimental data obtained from flashover with background gases such as nitrogen, air, and argon all at pressures exceeding 50 Torr.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126202174","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

Spectroscopic measurements of a toroidal air plasma 环形空气等离子体的光谱测量

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191599

A. Lodes, R. Curry, M. E. Rudroff, Mark F. C. Schmidt, A. J. Bauer, W. Brown

引用次数: 3

Axial propagation of nano-seconds pulsed discharge in coaxial reactor 纳秒脉冲放电在同轴反应器中的轴向传播

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191437

T. Hirota, S. Okada, D. Wang, T. Namihira, H. Akiyama

引用次数: 0

Development of a cluster burst pulse generator based on a SOS diode switch for bioelectrics applications 基于SOS二极管开关的生物电学用簇突发脉冲发生器的研制

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191580

T. Toyooka, Y. Minamitani

引用次数: 3