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Transit Properties of High Power Ultra\|Fast Photoconductive Semiconductor Switch 被引量:1
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作者 施卫 赵卫 +1 位作者 孙小卫 LamYeeLoy 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2000年第5期421-425,共5页
Experiments of a GaAs ultra\|fast Photo\|Conductive Semiconductor Switch (PCSS) are reported. Both the linear and nonlinear modes were observed when triggered by the μJ nano\|second laser. The peak current could... Experiments of a GaAs ultra\|fast Photo\|Conductive Semiconductor Switch (PCSS) are reported. Both the linear and nonlinear modes were observed when triggered by the μJ nano\|second laser. The peak current could be as high as 560A. The rise time of the current pulse responses is less than 200ps when triggered with 76MHz femto\|second laser. 展开更多
关键词 ultra\|short electromagnetic pulse source photoconductive switch
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Self-modulation and anomalous collective scattering of laser produced intense ion beam in plasmas
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作者 K.Mima J.Fuchs +5 位作者 T.Taguchi J.Alvarez J.R.Marques S.N.Chen T.Tajima J.M.Perlado 《Matter and Radiation at Extremes》 SCIE EI CAS 2018年第3期127-134,共8页
The collective interaction between intense ion beams and plasmas is studied by simulations and experiments,where an intense proton beam produced by a short pulse laser is injected into a pre-ionized gas.It is found th... The collective interaction between intense ion beams and plasmas is studied by simulations and experiments,where an intense proton beam produced by a short pulse laser is injected into a pre-ionized gas.It is found that,depending on its current density,collective effects can significantly alter the propagated ion beam and the stopping power.The quantitative agreement that is found between theories and experiments constitutes the first validation of the collective interaction theory.The effects in the interaction between intense ion beams and background gas plasmas are of importance for the design of laser fusion reactors as well as for beam physics. 展开更多
关键词 Two stream instabilities ultra intense short pulse laser Proton beam Wake field Electron plasma wave Laser plasma interaction
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Experimental Investigation on Complex Structures Machining by Electrochemical Micromachining Technology 被引量:10
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作者 刘勇 朱荻 +2 位作者 曾永彬 黄绍服 余宏兵 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2010年第5期578-584,共7页
Electrochemical micromachining (EMM) technology for fabricating micro structures is presented in this article. By applying ultra short pulses, dissolution of a workpiece can be restricted to the region very close to... Electrochemical micromachining (EMM) technology for fabricating micro structures is presented in this article. By applying ultra short pulses, dissolution of a workpiece can be restricted to the region very close to the electrode. First, an EMM system for meeting the requirements of the EMM process is established. Second, sets of experiments is carried out to investigate the influence of some of the predominant electrochemical process parameters such as electrical parameters, feed rate, electrode geometry features and electrolyte composition on machining quality, especially the influences of pulse on time on shape precision and working end shape of electrode on machined surface quality. Finally, after the preliminary experiments, a complex microstructure with good shape precision and surface quality is successfully obtained. 展开更多
关键词 ELECTROCHEMICAL MICROMACHINING ultra short pulse working end shape surface quality complex structure
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