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新型电子束源—虚火花放电室设计 总被引:1,自引:0,他引:1
提出一种新型的脉冲线加速器驱动的高功率,强流密度,低发射率,高亮度电子束源-虚火花放电室的初步设计。基于空心阴极效应和虚火花放电经验公式,确定了空心阴极,多隙阴-阳极,取及工作气压范围,最后提出关于虚火花产生高亮度电子束源的总体实验方案。 相似文献
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介绍了对一台脉冲线加速器驱动虚火花放电装置产的电子束发射度的测量工作。在十隙虚火花放电室中育以15Pa的氮气,产生能量为约200keV,束流2000A,直径为1mm和高亮度电子束。在距阳极5cm处测得电子束的均方根发射度εrms≈48mm.mrad,规一化发射率εn≈47mm.mrad。 相似文献
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利用多极板赝火花放电装置产生的高功率脉冲电子束对不同类型的钢, 如45#, 65Mn, T8, 9Cr18和GCr15等进行轰击, 研究其在金属材料表面改性中的应用. 样品表面的显微硬度和耐腐蚀性测试结果以及扫描电子显微镜(SEM)的观察分析表明, 经电子束轰击后, 这些材料在结构、组织和性能上发生了明显的变化, 轰击中心区域的显微硬度和耐蚀性明显提高. 基于一维热传导方程对材料表面的冷却速率进行了估算, 对电子束与金属材料的作用过程进行了理论分析. 结果表明, 高功率密度脉冲电子束与金属材料相互作用, 表面冷却速率高达1. 2×1012 ℃/s, 使材料表面局部瞬间达到熔化, 产生骤热急冷过程. High power density electron beams generated by multiplate pseudospark discharge chamber, have been used to bombard various kinds of steel targets such as 45#, 65Mn, T8, 9Cr18, GCr15, etc, and studyits applications for modification of metal surface. The microhardness and corrosive resistance property have been measured and the morphology was obtained by using SEM analysis. The results showed that the surface properties and structure of the matevials bom barded have been modified; in the bombarded center area, the microhardness as well as corrosive resistance property was improved obviously. The interactions befween the electron beam and metal materials were theoretically considered and discussed on the basis of simple calculation with one dimensional thermal transfer equation. It showed that the cooling rate of metal surface with 1.2×1012 ℃/s was so high that caused the metal surface instant melted, and abrupt cooled. 相似文献
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基于电场递增效应理论,讨论了多极板赝火花脉冲电子束的特征.通过电子束对固体变色片和金属靶的轰击,对赝火花电子束的不稳定性、细丝效应和自箍缩效应等现象做了研究和分析.The characteristics of pulsed electron beam generated by multiplate pseudospark chamber (MPC) on the basis of field escalation effects have been described in this paper. The phenomena such as instability, filament effect, and self-pinch effect of pseudospark electron beam were studied and analyzedby the bombardment of solid evident films and metal targets. 相似文献
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采用粒子模拟和蒙特卡罗相结合的方法,应用静电求解模型,对赝火花开关初始放电过程进行了模拟。赝火花开关初始放电过程主要由汤森放电过程、等离子体形成、空心阴极效应和场致发射引发主放电组成;等离子体形成和空心阴极效应对赝火花开关的发展导通具有至关重要的作用。改变赝火花开关工作参数,如气压、电极孔径、阳极电压和阴极腔中初始粒子密度,研究其对赝火花开关电子峰值电流形成时间的影响。结果表明:随着气压、电极孔径、阳极电压和初始粒子密度的增大,赝火花开关电子峰值电流形成时间减小。 相似文献
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Ming Chang Wang Gun-Sik Park 《International Journal of Infrared and Millimeter Waves》1997,18(6):1187-1198
An analysis of the high voltage power supply removing the Pulse Forming Line (PFL) is presented in this paper. This is an
important improvement to make a desktop free electron laser with about one meter length instead of an original device length
of 5.5 meters and to realize other applications of the new beam source of pseudospark discharge at high voltage of 200kV and a current of 2kA. 相似文献
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l.IntroductionPscudosparkdischargeisakindofgasdischargewhichoccursinaspecialgcometry,theso-calledPseudosparkChambcr(PSC),athighvoltages(lokV~rlMV)andlowpressures(lpa-loopa).ThePSCconsistsofahollo`vcathodeandaplateanodebothwithacommoncentraldischargechannel.Wllenaninsulatorisinsertedbetweenthehollowcathodeandtheanode,thisdeviceiscalledthesinglcgapPSCi``ithstacksofalternativeinsulatorandinter-mediateeleqtrodebeingplaced,itiscallcdthemultiplegapPSC.Thepseudosparkelectronbeamshavebeengenera… 相似文献