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Rod-pinch 二极管理论及数值模拟
引用本文:魏合理,陈秀红,余凯,田永青.Rod-pinch 二极管理论及数值模拟[J].强激光与粒子束,2007,19(2):0-192.
作者姓名:魏合理  陈秀红  余凯  田永青
作者单位:1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900
基金项目:中国科学院方向性创新项目资助课题;中国科学院院长基金
摘    要:介绍了Rod-pinch二极管的基本结构和工作原理,采用Laminar模型分析了Rod-pinch二极管中的粒子运动过程及其阻抗特性。考虑背景空间离子电荷的影响,用1维Laminar方程分析Rod-pinch二极管中电子的自箍缩过程,并且利用Magic程序对其中的粒子运动进行数值模拟,求解二极管中的电压和电流,最终得出二极管的阻抗特性,在较低电压下,负极性RPD的性能明显不如正极性RPD。根据临界电流经验公式,初步验证Laminar理论模型的可行性。

关 键 词:Laminar模型    Rod-pinch二极管    数值模拟    阻抗特性
文章编号:1001-4322(2007)02-0187-06
收稿时间:2006/11/24
修稿时间:2006-11-24

Analysis of the detectable stellar magnitude limit using CCD camera in daytime sky background
WEI He-li,CHEN Xiu-hong,YU Kai,TIAN Yong-qing.Analysis of the detectable stellar magnitude limit using CCD camera in daytime sky background[J].High Power Laser and Particle Beams,2007,19(2):0-192.
Authors:WEI He-li  CHEN Xiu-hong  YU Kai  TIAN Yong-qing
Affiliation:1.Institute of Fluid Physics,CAEP,P.O.Box 919-107,Mianyang 621900,China
Abstract:The method to estimate the detectable stellar magnitude limit in daytime sky background is introduced. Based on the results of the contrast of star to sky background in daytime, the detectable stellar magnitude limits are computed and analyzed as functions of observing heights, solar zeniths angle, wavebands and stellar spectral types for 3°´3° field of view. The results show that the detectable stellar magnitude limits linearly increase with observing height and solar zenith angle. A higher detectable stellar magnitude limit is obtained by using longer wavelength bands for stars of K and M types. For the case of 25 km observing altitude, the field of view of 3°´3°, the maximum detectable stellar magnitude limit is 6.3 when the sun is out of 20° line of sight.
Keywords:CCD
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