2011 IEEE Pulsed Power Conference最新文献_第8页

Design of a single stage supersonic reluctance coilgun (RCG) 单级超音速磁阻线圈枪(RCG)设计

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191548

T. El-Hasan

引用次数: 8

3D simulations of the self-magnetic-pinch diode 自磁捏缩二极管的三维仿真

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191642

N. Bruner, D. Welch, M. Johnston, B. Oliver

引用次数: 0

Design of a damped sinusoidal oscillator system 阻尼正弦振荡器系统的设计

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191456

J. M. Lee, H. Kwon, S. M. Hwang, J. Ahn

引用次数: 6

Shaper of a current pulse of megaampere level with rise time of 100 ns 上升时间为100纳秒的兆安级电流脉冲整形器

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191478

P. Duday, E.V. Bochkov, V. Dudin, G. Dolgachev, V. A. Ivanov, A. V. Ivanovsky, B. Egorychev, A. A. Zimenkov, S. M. Polyushko, A. N. Skobelev, V. B. Kudelkin, A. I. Kraev, A. Nemchinov, Y.I. Matsev, A. Fevralev

{"title":"Shaper of a current pulse of megaampere level with rise time of 100 ns","authors":"P. Duday, E.V. Bochkov, V. Dudin, G. Dolgachev, V. A. Ivanov, A. V. Ivanovsky, B. Egorychev, A. A. Zimenkov, S. M. Polyushko, A. N. Skobelev, V. B. Kudelkin, A. I. Kraev, A. Nemchinov, Y.I. Matsev, A. Fevralev","doi":"10.1109/PPC.2011.6191478","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191478","url":null,"abstract":"The paper presents the method of shaping the current pulse of submegampere level with the rise time of 100 ns. At this a device on the basis of an explosive magnetic generator can be the source of the original current of microsecond duration. A low-inductive foil electrically exploded current opening switch designed at VNIIEF and a vacuum discharger developed at the RSC KI under “Baikal” program are used to shape the current pulse with required parameters. To test the proposed method of the current pulse shaping, the configuration of a series of explosive experiments has been worked out. The helical explosive magnetic generator with the explosive current opening switch is used as the energy source. In the experiments it is proposed to get the current pulse with the amplitude 4–5 MA and rise time of ∼100 ns in the load of ∼10 nH. The results of the experimental checking of the experiment configuration under laboratory conditions on the facility with capacitive energy storages will be given. The results of the first explosive experiment will be described and analyzed.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"255 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":"117330435","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

In vivo experiment of applying nanosecond pulsed electric fields on solid tumor 纳秒脉冲电场作用于实体瘤的体内实验

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191594

Y. Magori, S. Ohta, T. Kageyama, K. Teranishi, N. Shimomura, Y. Uto, H. Hori

{"title":"In vivo experiment of applying nanosecond pulsed electric fields on solid tumor","authors":"Y. Magori, S. Ohta, T. Kageyama, K. Teranishi, N. Shimomura, Y. Uto, H. Hori","doi":"10.1109/PPC.2011.6191594","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191594","url":null,"abstract":"Pulse electric fields conduct apoptosis to biological cells. Many studies have started to apply the phenomena to cancer therapy. In this study, we introduce the embryonated chick assay to the experiment applying nanosecond pulse electric fields on tumor. The embryonated chick assay has several advantages in experiments; this experiment is generically classified as in vivo. Many species of virus or rickettsia are available because of the low protective immunity. In some conditions, angiogenesis would be yielded so that the cancer tissue in body was well simulated. To preparation of many specimen materials, with large incubator, is easier than that for laboratory animal such as mice and rats. Nanosecond pulse electric fields (nsPEF) are applied on a tumor on the chorioallantoic membrane in an egg with needle electrodes. A pulsed power generator whose output pulse length is a nanosecond is used in this experiment. The tumor cells: EMT6/KU (mouse breast adenocarcinoma cells) adopted for the experiment are transplanted before several days in advance. The cells form a solid tumor. The needle electrode to apply nsPEF consists of a steeple stainless wire of 1 mm in diameter with a rubber sleeve. The two or four needle electrodes are inserted into the egg through a window on shell so as to tack the tumor in them. The tumors are retrieved from the eggs a few days after nsPEF application and are weighed. The control eggs without nsPEF application are also processed as the same procedure. Rejection-test are used for significant test on application of pulsed electric fields. The significant difference between weight of the tumor with nsPEF application and that of control was confirmed with the significant tests. The difference increased with the charging voltage of pulsed power generator. Another experiment is necessary not only to find the optimal experimental condition but to develop the experimental instruments for therapy.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"42 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":"123455383","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: 9

Extension of the operating point of the Mercury IVA from 6 to 8 MV 水银IVA的工作点从6毫伏延长到8毫伏

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191638

R. Allen, R. Commisso, G. Coopersteina, P. F. Ottingera, J. Schumer

{"title":"Extension of the operating point of the Mercury IVA from 6 to 8 MV","authors":"R. Allen, R. Commisso, G. Coopersteina, P. F. Ottingera, J. Schumer","doi":"10.1109/PPC.2011.6191638","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191638","url":null,"abstract":"The output voltage of the NRL Mercury generator has been successfully increased to 8 MV. Mercury was originally designed for 6 MV, 300 kA operation in negative polarity [1]. However, new experiments required a bremsstrahlung x-ray source with a higher endpoint voltage [2],[3]. The threshold energy for photofission in targets of interest is about 5.5 MeV and, given the roughly Gaussian shape of the Mercury output pulse, very few x rays above threshold could be generated by Mercury with a 6-MV peak output voltage. Also, the cross section for fission rises sharply above the threshold energy. It was therefore decided to increase the output voltage of Mercury to the maximum possible without imposing undo cost or risk. A new center conductor was designed for Mercury that increased the effective output impedance of the MITL from about 23 to 40 Ω, thereby increasing the maximum output voltage to 8 MV. The new center conductor has carefully designed tapers (steps down in diameter) at each stage of the adder so that the adder cell voltages are equally balanced at the design limit of 1.3 MV. One limiting factor is the breakdown probability of the insulator stack in the adder cells. However, simulations have shown that the new center conductor only increases the breakdown probability a small amount. The 40 Ω output impedance was selected because it allowed us to reuse several pieces of the existing center conductor. Aluminum was used for most of the new parts. These steps allowed us to save time and keep material costs to a minimum. PIC and circuit simulations were performed to validate the design. Mercury has now been successfully operated for over 200 shots at 8 MV.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"22 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":"124448356","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: 11

Design considerations for flux-trapping helical flux compression generators energized by capacitive discharge 电容放电驱动的磁通捕获螺旋磁通压缩发电机的设计考虑

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191479

A. Young, A. Neuber, M. Kristiansen

引用次数: 4

Test for end connection integrity of metalized film capacitors 金属化薄膜电容器端部连接完整性试验

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191563

S. Qin, X. Qi, R. Jow, S. Boggs

引用次数: 0

Coaxial capacitive voltage divider with high division ratio for high voltage pulses with very fast rise times 同轴电容分压器，具有高分路比，适用于上升时间非常快的高压脉冲

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191436

Tonis Hobejogi, J. Biela

引用次数: 15

Semiconductor switches in counter-pulse capacitor bank 反脉冲电容器组中的半导体开关

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191679

R. Enikeev, B. Fridman, R. Serebrov

{"title":"Semiconductor switches in counter-pulse capacitor bank","authors":"R. Enikeev, B. Fridman, R. Serebrov","doi":"10.1109/PPC.2011.6191679","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191679","url":null,"abstract":"Operation of Counter-Pulse Capacitor Banks (CPCB) is characterized by a number of features, which complicate the safe operation of semiconductor switches. These features are as follows. The necessity to operate in the surge-current mode at high currents up to 100kA within about 1 ms results in overheating and possible thermal damage of the semiconductor structure. The discharge process ends with closing of the switches and emergence of reverse voltage, which can be higher than the initial voltage of the capacitors. One of the key elements of the discharge circuit is the inductor, which limits the discharge current. Reverse recovery process in the circuit with this inductor causes generation of high-voltage spikes, which might result in the damage of a semiconductor device overheated by surge-current by this moment. The paper studies the above-listed features and analyzes the safe operation of Pulsed Power Thyristors (PPT) and Light Triggered Thyristors (LTT) under these conditions. The method for tracking of thermal generation peaks on the thyristor voltage drop curve was used for evaluation of allowable currents. Suppression of switching overvoltages is commonly provided by snubber R-C circuits. To eliminate spikes a snubber R-C circuit should contain, as a rule, large capacitors and resistors with a low resistance. But, in this case the rate of anode current pulse rise is very high, which might cause the thyristor to fail during switch-on. This made it necessary to develop special snubber circuits, which are free from disadvantages of usual circuits. The paper presents the results of experimental research of the thyristor switch-on and switch-off in CPCB prototypes. The developed method (suppression of impulse switching overvoltages) is demonstrated. The possibility of safe operation of the semiconductor switches in CPCB has been verified.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"13 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":"125124486","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