Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)最新文献_第6页

Technologies for development of more affordable large X-ray simulators 开发更经济实惠的大型x射线模拟器的技术

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.825462

K. Ware, R. Gullickson, J. Pierre, R. Schneider, I. Vitkovitsky

引用次数: 3

Conductor energy losses at 10 MA/cm on Z Z上10ma /cm的导体能量损耗

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823684

R. Spielman, W. Stygar, K. Struve, S. Rosenthal, M. Desjarlais, Michael R Douglas, J. Asay, C. Hall, M. Bernard, T. Gilliland, T. Wagoner

引用次数: 5

Inductive voltage adder driven X-ray sources for hydrodynamic radiography 水动力射线照相用电感电压加法器驱动的x射线源

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.825465

J. Maenchen, S. Cordova, J. Gustwiller, D.L. Johnson, P. Menge, I. Molina, C. Olson, S. Rosenthal, D. Rovang, O. Oliver, D. Welch, V. Bailey, I. Smith, D. Droemer, E. Hunt, G. Macleod, L. Woo

{"title":"Inductive voltage adder driven X-ray sources for hydrodynamic radiography","authors":"J. Maenchen, S. Cordova, J. Gustwiller, D.L. Johnson, P. Menge, I. Molina, C. Olson, S. Rosenthal, D. Rovang, O. Oliver, D. Welch, V. Bailey, I. Smith, D. Droemer, E. Hunt, G. Macleod, L. Woo","doi":"10.1109/PPC.1999.825465","DOIUrl":"https://doi.org/10.1109/PPC.1999.825465","url":null,"abstract":"Inductive voltage adder (IVA) accelerators were developed to provide high-current (100s of kA) power pulses at high voltage (up to 20 MV) using robust modular components. This architecture simultaneously resolves problems found in conventional pulsed and linear induction accelerators. A variety of high-brightness pulsed X-ray radiographic sources are needed from submegavolt to 16-MeV endpoints with greater source brightness (dose/spot/sup 2/) than presently available. We are applying IVA systems to produce very intense (up to 75 TW/cm/sup 2/) electron beams for these flash radiographic applications. The accelerator electromagnetic pulse is converted to a directed electron beam at the end of a self-magnetically insulated vacuum transmission line. The cantilevered cathode threading the accelerator cavities terminates in a small (l-mm diameter) needle, producing the electron beam which is transported to a grounded Bremsstrahlung converter within a strong (/spl sim/50 T) axial magnetic field. These systems produce mm-sized stable electron beams, yielding very intense X-ray sources. Detailed simulations of the electron beam generation, transport, and target interaction are presented along with scaling laws for the radiation production and X-ray spot size. Experimental studies confirm these simulations and show this reliable, compact, and inexpensive technology scales to 1000-R doses a meter from a mm-diameter source in 50 ns.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"132 1","pages":"279-282 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88355774","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: 17

Experimental studies of long-lifetime cold cathodes for high power microwave oscillators 大功率微波振荡器用长寿命冷阴极的实验研究

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823644

A. Gunin, V. F. Landl, S. Korovin, G. Mesyats, V. Rostov

引用次数: 16

The thermohydraulic generator: a pulse power source of intense pressure pulses 热液发生器:一种脉冲电源，产生强烈的压力脉冲

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823597

W. Hartmann, J. Kieser, K. Rohde

引用次数: 2

Experimental study of a small gas-puff Z-pinch plasma device 一种小型充气z捏缩等离子体装置的实验研究

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823590

Chengmu Luo, Chengrong Li, Xinxin Wang, Zhifeng Xie, X.M. Guo, Min Han

引用次数: 0

Atlas tri-plate standoff insulators' design and test results 阿特拉斯三板绝缘子的设计和试验结果

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823792

J. Elizondo, R. Smelser, P. Aragon, D. Torres, K. Prestwich, K. Nielsen, H. Davis, B. Hinkley

{"title":"Atlas tri-plate standoff insulators' design and test results","authors":"J. Elizondo, R. Smelser, P. Aragon, D. Torres, K. Prestwich, K. Nielsen, H. Davis, B. Hinkley","doi":"10.1109/PPC.1999.823792","DOIUrl":"https://doi.org/10.1109/PPC.1999.823792","url":null,"abstract":"The Atlas system consists of 96 Marx generators, arranged in a circle. Sets of four generators feed a tri-plate transmission line, and the tri-plate lines in turn feed a central load region. The space between the plates is a nominal 2.00 cm (0.787 inch). This spacing and support of the central plate are provided by a set of insulators referred to as the tri-plate standoff insulators (TSI). The insulators were designed to provide the required mechanical support, ease of replacement or removal for maintenance, and the electric field gradient standoff. Two materials were selected: one was chosen because it has reasonable mechanical properties and a dielectric constant close to that of oil (polypropylene /spl epsiv/=2.3); the other material was selected because of its increased mechanical strength, even though the dielectric constant is higher than that of oil (Nylon MC 901 and 907 /spl epsiv/=3.7). Testing of the insulators was performed in a three-foot diameter tri-plate assembly. The test setup accepts four insulators at a time. The nominal operational voltage for the tri-plates is 240 kV at a t/sub eff/ of 0.87 /spl mu/s. The testing was performed at up to 450 kV with a t/sub eff/ of 2.8 /spl mu/s. The insulators were successfully tested until oil breakdown between the plates was reached, with no insulator flashover.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"293 1","pages":"1407-1409 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81619488","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

Solid state modulator for klystron/gyrotron conditioning, testing, and operation 固态调制器，用于速调管/回旋管调节，测试和操作

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823762

M. Gaudreau, J. Casey, T. Hawkey, M. Kempkes, J. Mulvaney

{"title":"Solid state modulator for klystron/gyrotron conditioning, testing, and operation","authors":"M. Gaudreau, J. Casey, T. Hawkey, M. Kempkes, J. Mulvaney","doi":"10.1109/PPC.1999.823762","DOIUrl":"https://doi.org/10.1109/PPC.1999.823762","url":null,"abstract":"Conditioning, test, and operation of high power microwave tubes, such as klystrons and gyrotrons, is a complex process. Each tube must be conditioned over increasing voltages and input power levels to achieve reliable performance without damage to the tube itself. Effective conditioning requires significant freedom to control voltage, pulsewidth, and PRF, at very high power (20 MW+) and voltage (100 kV+). Conventional modulator technologies capable of switching these high power levels are limited in their flexibility, and require significant operator knowledge and time to reach full performance. This process represents a significant cost factor in the development, production, conditioning, and operation of high power microwave tubes. To address these issues Diversified Technologies, Inc. (DTI) is working with Communication and Power Industries (CPI), in Pale Alto CA., to bring solid state technology to the high power tube testing process. This paper addresses the design of the solid state switches and the initial testing experience at DTI and CPI.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"44 1","pages":"1295-1298 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88148830","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: 12

An overview of the mechanical design of the Atlas pulsed power machine 阿特拉斯脉冲功率机的机械设计概述

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.823669

D. Bowman, E. Ballard, G. Barr, G. Bennett, J. Cochrane, H. Davis, T. Davis, G. Dorr, R. Gribble, J. Griego, M. Hood, H. J. Kimerly, A. Martinez, T. McCuistian, R.B. Miller, S. Ney, K. Nielsen, P. Pankuch, W. Parsons, C. Potter, R. Ricketts, H. Salazar, D. Scudder, C. Shapiro, M. Thompson, R. Trainor, G. Valdez, W. Yonemoto

{"title":"An overview of the mechanical design of the Atlas pulsed power machine","authors":"D. Bowman, E. Ballard, G. Barr, G. Bennett, J. Cochrane, H. Davis, T. Davis, G. Dorr, R. Gribble, J. Griego, M. Hood, H. J. Kimerly, A. Martinez, T. McCuistian, R.B. Miller, S. Ney, K. Nielsen, P. Pankuch, W. Parsons, C. Potter, R. Ricketts, H. Salazar, D. Scudder, C. Shapiro, M. Thompson, R. Trainor, G. Valdez, W. Yonemoto","doi":"10.1109/PPC.1999.823669","DOIUrl":"https://doi.org/10.1109/PPC.1999.823669","url":null,"abstract":"Atlas is a pulsed-power facility being designed at Los Alamos National Laboratory to perform high-energy density experiments in support of Science-Based Stockpile Stewardship and basic research programs. Atlas will consist of 24 individual maintenance units, each consisting of 4 240-kV Marx units. Maintenance units are contained in large oil tanks arrayed in a circle about a central target chamber. Total stored energy of the capacitor bank will be 23 MJ. Maintenance units will discharge through an output shorting switch into a vertical tri-plate transmission line, and from there into a transition area/collector inside a large vacuum chamber. An overview of mechanical design aspects of the Atlas machine is presented. These include maintenance unit design and design of the tri-plate transmission line and transition region. Findings from fabrication and testing of prototype systems are discussed.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"33 1","pages":"933-936 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87108183","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

Comparative study of a relativistic magnetron performance with various cathodes 不同阴极下相对论磁控管性能的比较研究

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358) Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.825446

Y. Saveliev, W. Sibbett, S. Spark, B. Kerr, M. I. Harbour, S. C. Douglas

{"title":"Comparative study of a relativistic magnetron performance with various cathodes","authors":"Y. Saveliev, W. Sibbett, S. Spark, B. Kerr, M. I. Harbour, S. C. Douglas","doi":"10.1109/PPC.1999.825446","DOIUrl":"https://doi.org/10.1109/PPC.1999.825446","url":null,"abstract":"Cathode plasma expansion into a vacuum gap is one of the major physical mechanisms affecting the relativistic magnetron (RM) performance and causing a so-called pulse shortening. Therefore, development of new cathode technologies may lead to a significant enhancement of the microwave pulse length, efficiency and power of RMs. The authors are currently conducting a series of experiments with various cathodes with an aim towards improving the RM characteristics. The first results of this research were reported at the BEAMS'98 Conference (Haifa, Israel). In this paper, a more detailed analysis of the experimental data is presented. A primary objective in this research was to determine how the cathode geometry and type of the emission surface would influence major RM characteristics such as microwave pulse duration, output power and magnetron efficiency. The authors found that the cathode geometry influences strongly the RM operation but that the type of emission surface has much less significance. The cathode end caps, which have been mostly abandoned after transition from classical to relativistic magnetrons, were shown to be able to increase the microwave power and RM efficiency without facilitating the pulse shortening effect.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"41 1","pages":"198-201 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85720447","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