Twenty-First International Power Modulator Symposium, Conference最新文献

Pseudo-spark Switch Development For The LHC Beam Dumping System 大型强子对撞机束流倾倒系统的伪火花开关研制

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597097

L. Ducimetière, P. Faure, U. Jansson, H. Riege, K. Schmidt, G. Schroder, E. Vossenberg, J. Hańderek, P. Bénin, L. Courtois

{"title":"Pseudo-spark Switch Development For The LHC Beam Dumping System","authors":"L. Ducimetière, P. Faure, U. Jansson, H. Riege, K. Schmidt, G. Schroder, E. Vossenberg, J. Hańderek, P. Bénin, L. Courtois","doi":"10.1109/MODSYM.1994.597097","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597097","url":null,"abstract":"The kicker magnet pulse generators for the beam dumping system of CERNs Large Hadron Collider (LHC) require fast high power switches (35 kV, 30 kA, 8 ps) of very low repetition rate (only a few pulses per day). Cold cathode tubes like pseudo-spark switches look suitable for this kind of application, as they do not suffer from cathode-heater lifetime limitations and may guarantee a quasi unlimited operation time. Pseudo-spark assemblies are therefore under development with the aim of obtaining a switch tailored to two main requirements of the LHC dumping system, a very low prefire rate (-10-4) and a large ratio of maximum to minimum operation voltage (-15). It is intended to achieve these goals with a 2-gap or 3-gap version employing a ferroelectric trigger in each of the gaps. Experimental results on several 1-gap prototypes of different electrode diameter will be reported. Two of the prototypes have been mounted in a sealed-off version, equipped with a deuterium gas reservoir. The erosion behaviour has been investigated for different electrode materials, pure tungsten, thoriated tungsten and tungstedrhenium (5% Re). Important differences in the quenching behaviour between pure and thoriated tungsten have been found. The incorporation of these results into a 2-gap beam dump switch, soon to be assembled, will be discussed.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115987129","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

Modulation Capabilities Of Different Grid Designs For A Cs-ba Tacitron Cs-ba Tacitron不同栅格设计的调制能力

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597084

B. Wernsman, M. El-Genk

引用次数: 6

Very High Power 300 KW Modulator 超高功率300kw调制器

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597037

H. Anamkath, E. Gower, D. Palmer, K. Whitham, A. Zante

引用次数: 0

A Klystron-modulator Interlock And Fault Acquisition System Using G-64, VME, And MIL-1553-B Standards 采用G-64, VME和MIL-1553-B标准的速调管调制器联锁和故障采集系统

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597074

A. Campbell, M. Grippeling, G. Mcmonagle, P. Pearce, G. Rentier

引用次数: 1

A Theorem On The Dependence Of Hm On Gain In A Magnetic Pulse Compressor, And Its Implications On The Core Volume Formula 磁脉冲压缩器中Hm与增益关系的定理及其对磁芯体积公式的启示

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597091

I. Druckmann

引用次数: 0

Transient Analysis Methods For Multisection Charged Transmission Line Pulse Generators 多段带电输电线路脉冲发生器的暂态分析方法

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597076

J. Tsinetakes

引用次数: 0

Generation Of Sub-nanosecond Pulses Using A Solid State Marx Circuit With Trapatt Diode Switches 利用带特拉帕特二极管开关的固态马克思电路产生亚纳秒脉冲

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597050

W. Carey, W. Nunnally

引用次数: 1

Microdischarge Detection In High Frequency Capacitors 高频电容器微放电检测

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597090

C. Nowak, J. Stopher, J. Zirnheld, R. Dollinger

{"title":"Microdischarge Detection In High Frequency Capacitors","authors":"C. Nowak, J. Stopher, J. Zirnheld, R. Dollinger","doi":"10.1109/MODSYM.1994.597090","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597090","url":null,"abstract":"Higher frequency power is playing an increasingly important role in the power conditioning and high power electronics areas. This is evident in manv new applications of high frequency devices such as sw'itching power supplies, radar modulators, and numerous pulsed power applications. Multi-factor stressing and related erosion of the dielectric material from microdischarges form a dominant cause of device failure, and this insulation deterioration can be accelerated under higher frequency stressing. The methods developed t o investigate component failure have been established in the past by 60 Hz system requirements. Conventional detection systems are designed for dc, 60 Hz, and 400 Hz, but cannot generally be applied at high frequencies. This lack of high frequency diagnostic capabilities has contributed t o a poor understanding of aging processes and failure mechanisms in new high frequency devices. To help researchers understand the fundamental aging processes and reliably be able t o predict service lifetimes, new tools that can detect and analyze microdischarge activity under high frequency conditions a re being developed. This paper describes the design of a new microdischarge detection technique that can be used at high frequencies, and it 's application t o capacitors. This technique uses a series resonant multikilohertz power system in which the primary capacitance is two capacitors under tes t . Preliminary assessment of this new detection technique have validated its applicability t o high frequency components. Initial test data and it's relevance will be discussed in detail. This new detection technique offers a multi-spectral diagnostic capability which will help advance scientific understanding of the fundamental aging processes under the high frequency conditions for which the devices are designed.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130287965","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

Emittance Measurement Of An Electron Beam Extracted From A Plasma Edge Cathode 等离子体边缘阴极提取电子束的发射度测量

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597089

R. Stemprok, K. Zieher

{"title":"Emittance Measurement Of An Electron Beam Extracted From A Plasma Edge Cathode","authors":"R. Stemprok, K. Zieher","doi":"10.1109/MODSYM.1994.597089","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597089","url":null,"abstract":"current density of 100 A/cm2 [1,31. The Plasma Edge Cathode concept can possibly produce high electron current densities while avoiding or delaying plasma closure of the extraction gap of an electron source. An obstacle partially intercepts the plasma jet emitted from a spark plug and causes a stationary transverse plasma boundary from which electrons are extracted. The plasma should experience negligible external electric forces as long as the extraction is space charge limited. It should be possible to avoid the plasma closure of the extraction gap and obtain an extracted electron current density over 100 A/cm2 for practical plasmas. Experimental results partially support this theoretical prediction. Electron current densities up to 40 A/cm2 were obtained repeatedly with a duration up to 2.5 ps. The pepper-pot method was used to measure the effective emittance of the extracted electron beam. The images (50 ns exposure time) were digitized by a scanner and a computer code determined the effective emittance. An extraction gap of 15 mm together with an extraction voltage less than 20 kV yielded a relatively smooth pattern on the scintillator. About half of the 100 shots taken so far could be clearly scanned and evaluated. They have suitable exposure and separated spots. The effective emittance E' = 4x,, xim, and = 4y,, yims are of the order of 5 ~ 1 0 ~ m r a d = 1 . 6 ~ 1 0 ~ x m r a d with some shots down to 10-3mrad = 3 . 2 ~ 1 0 ~ x m r a d . At higher extraction voltages the pattern was irregular and indicated some instability of the plasma surface. The normalized brightness was found typically in the range from 2x 1 O6 to 2x lo7 A/m2rad2.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125409941","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

Recent Advances In Cs-Ba Tacitron Technology Cs-Ba Tacitron技术的最新进展

Twenty-First International Power Modulator Symposium, Conference Pub Date : 1994-06-27 DOI: 10.1109/MODSYM.1994.597088

M. El-Genk, B. Wernsman, J. Luke

引用次数: 2