Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference最新文献_第2页

Development of long-lifetime cold cathodes 长寿命冷阴极的研制

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596457

N. Bykov, V. Gubanov, A. Gunin, S. Korovin, O. Kutenkov, V. F. Landl, S. Polevin, V. Rostov, G. Mesyats, F. Zagulov

{"title":"Development of long-lifetime cold cathodes","authors":"N. Bykov, V. Gubanov, A. Gunin, S. Korovin, O. Kutenkov, V. F. Landl, S. Polevin, V. Rostov, G. Mesyats, F. Zagulov","doi":"10.1109/PPC.1995.596457","DOIUrl":"https://doi.org/10.1109/PPC.1995.596457","url":null,"abstract":"The paper presents the results of an experimental study of the cold cathodes used in the Sinus-type repetitive high-current accelerators. The accelerating voltage for this accelerator is on a level of 100-1000 keV, the electron beam current is 1-10 kA, the pulse duration is 10-40 ns, and the pulse repetition rate is up to 200 pps. The emissive properties of the cathodes were investigated for both planar and coaxial magnetically insulated vacuum diodes. To produce high-current electron beams in coaxial diodes, a strong magnetic field of strength up to 30 kOe created by a superconducting solenoid was used. Investigated in the experiment were explosive-emission cold cathodes of varied geometry made of various materials such as copper, steel, stainless steel, bronze, graphite, and carbon-graphite cloth as well as metal-dielectric cathodes depending for their operation on an incomplete electrical discharge over the dielectric surface. The longest lifetime has been attained for a metal-dielectric cathode in a planar vacuum diode; it is over 10/sup 8/ shots. The cathode provided the current density at the anode 20-25 A/cm/sup 2/ for the accelerating voltage 600 kV, pulse duration 20 ns, and pulse repetition rate up to 200 pps.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82066369","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: 16

High temperature superconducting opening pulser switch with compact thermoelectric source 具有紧凑热电源的高温超导开孔脉冲开关

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599772

T. Podlesak, H. Singh, R. Feltz, J. Creedon

{"title":"High temperature superconducting opening pulser switch with compact thermoelectric source","authors":"T. Podlesak, H. Singh, R. Feltz, J. Creedon","doi":"10.1109/PPC.1995.599772","DOIUrl":"https://doi.org/10.1109/PPC.1995.599772","url":null,"abstract":"A high temperature superconducting switch with external magnetic field switching was utilized to switch a thermoelectric source. The superconducting switch was constructed of filaments of yttrium-barium-copper oxide (YBCO) ceramic and switched with an externally applied magnetic field. The superconducting switch is being used as an opening switch for a thermoelectric current source. The thermoelectric source, based on Seebeck is capable of high current, low voltage generation. It consists of a series of hot and cold junctions, arranged in series to increase the voltage of the system. Source output is a function of temperature differential between cold and hot junctions. The superconducting switch operates at liquid nitrogen temperature. Therefore, liquid cryogen is available to the cold junctions of the current source, and, with sufficient heat applied to the hot junctions, a significant temperature differential, far greater than that obtained using conventional cooling, is available, thus increasing the overall efficiency of the system. The device sees application wherever a fast acting, lossless switch or current limiter is required, with a compact, simple power source, neither of which have any moving parts to fail or wear.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76221420","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

Removal of NO/sub x/ using discharges by pulsed power 脉冲功率放电去除NO/ subx /

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596469

H. Akiyama, K. Kawamura, T. Takeshita, S. Katsuki, S. Maeda, S. Tsukamoto, M. Murata

引用次数: 10

Basic research for repetition rate of blowing gas field distortion spark switch 吹气场畸变火花开关重复率的基础研究

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596820

Xie Ming, Deng Jianjun, Zang Enguan, Ding Bainan, Shi Jinshui, He Yi

引用次数: 0

Moire deflectometry diagnostic for transient plasma using a multi-pulse N/sub 2/ laser 多脉冲N/sub / 2激光瞬态等离子体的云纹偏转诊断

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599727

B. Moosman, V. Bystritskii, F. Wessel

引用次数: 0

Physical vapor deposited aluminum foils for high energy density physics experiments 高能密度物理实验用物理气相沉积铝箔

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599743

B. L. Barthell, W. Anderson, V. Gomez, B. Henneke, J.E. Moore, G. A. Reeves, M. Salazar, J. Townsend

引用次数: 0

Electrostatic modelling of a trigatron spark gap 三极电火花隙的静电建模

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599706

A. Macphee, S. Macgregor, S. Turnbull

引用次数: 6

Proposed generation and compression of a target plasma for MTF 提出了MTF靶等离子体的生成和压缩方法

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599751

R. Kirkpatrick, R. S. Thurston, R. Chrein, J. Guzik, A. Sgro, D. Scudder, F. Wysocki, J. Fernández, J. Shlachter, I. Lindemuth, P. Sheehey

{"title":"Proposed generation and compression of a target plasma for MTF","authors":"R. Kirkpatrick, R. S. Thurston, R. Chrein, J. Guzik, A. Sgro, D. Scudder, F. Wysocki, J. Fernández, J. Shlachter, I. Lindemuth, P. Sheehey","doi":"10.1109/PPC.1995.599751","DOIUrl":"https://doi.org/10.1109/PPC.1995.599751","url":null,"abstract":"Magnetized target fusion (MTF), in which a magnetothermally insulated plasma is hydrodynamically compressed to fusion conditions, represents an approach to controlled fusion which avoids difficulties of both traditional inertial confinement and magnetic confinement approaches. It appears possible to compress a magnetothermally insulated plasma to fusion ignition conditions using existing, relatively inexpensive drivers, such as pulsed power devices (including explosive pulsed power). Hence, MTF may represent a means to demonstrate and study ignited plasmas with a very small capital investment. An ongoing LANL explosive pulsed power collaboration with the Russian VNIIEF Laboratory at Arzamas 16 is partly motivated by this application. We are proposing to demonstrate the feasibility of magnetized target fusion by: (1) creating a suitable magnetized target plasma, and (2) performing preliminary liner compression experiments using existing pulsed power facilities and demonstrated liner performance. The required plasma conditions vary for different drivers, but are approximately described by temperature >50 eV, density >10/sup -6/ gm/cm/sup 3/, current of several hundred kiloamperes, and dimensions of one to a few cm (giving an embedded magnetic field of about 50 kG). The initial candidate for creating the target plasma is a fiber-initiated Z-pinch. These pinches have already been created with relevant parameters, but need to be optimized for the MTF application. The target plasma would be diagnosed and optimized inside a static liner, using interferometry, spectroscopy, and other diagnostic tools.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89086781","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

Pulsed power to the aid of chemical guns 在化学枪的帮助下使用脉冲电源

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596475

Z. Zabar, E. Levi, L. Birenbaum, P. Vottis, M. Cipollo, E. Kathe

引用次数: 3

Demonstration of a frequency-agile RF source configuration using bistable optically controlled semiconductor switches (BOSS) 使用双稳光控半导体开关(BOSS)的频率敏捷射频源配置演示

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596506

D. Stoudt, M. A. Richardson, S. Moran

{"title":"Demonstration of a frequency-agile RF source configuration using bistable optically controlled semiconductor switches (BOSS)","authors":"D. Stoudt, M. A. Richardson, S. Moran","doi":"10.1109/PPC.1995.596506","DOIUrl":"https://doi.org/10.1109/PPC.1995.596506","url":null,"abstract":"The processes of persistent photoconductivity followed by photo-quenching have been demonstrated at megawatt power levels in copper-compensated, silicon-doped, semi-insulating gallium arsenide. These processes allow a switch to be developed that can be closed by the application of one laser pulse (/spl lambda/=1.06 /spl mu/m) and opened by the application of a second laser pulse with a wavelength equal to twice that of the first laser (/spl lambda/=2.13 /spl mu/m). The opening phase requires a sufficient concentration of recombination centers (RC) in the material for opening to occur in the subnanosecond regime. These RCs are generated in the bulk GaAs material by fast-neutron irradiation (/spl sim/1-MeV). Neutron-irradiated bistable optically controlled semiconductor switch (BOSS) devices have been opened against a rising average electric field of about 36 kV/cm (18 kV) in a time less than one nanosecond while operating at a repetition rate, within a two-pulse burst, of about 1 GHz. The ability to modify the frequency content of the electrical pulses, by varying the time separation, is demonstrated. Results demonstrating the operation of BOSS devices in a frequency-agile RF source configuration are also discussed.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91444712","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: 8