摘要
本文介绍了用全息干涉法诊断爆炸丝等离子体的数据处理方法。在考虑等离子体区域为轴对称的情况下,给出了由折射率计算等离子体电子密度的计算公式。在爆炸丝能量为9.6J的情况下,拍摄到了延时3μs的爆炸丝等离子体干涉图。运用计算机图象处理技术对反拍后的干涉图进行了处理,获得了较为理想的干涉图。用微机控制的线阵CCD摄像机判读了干涉条纹漂移。给出了等离子体密度随径向分布的曲线,并得到相应的等离子体密度在中心处约为10^(16)个/cm^3。
The method of data processing for exploding wire plasma with holographic interferometry is described. When the plasma was symmetrical about center line, the calculating formula of plasma density through index is given. Hologram of exploding wire, which was exploded with energy source of 9.6 Joules and 3μs in advance of photographing, was taken. A set of digital image processing techniques were used and a satisfactory interference figure was ob-tained. The fringes order has been measured by linear CCD camera controlled by computer. The plot of the plasma electronic density as a function of radius are given, the one of central field being 1018cm-3
出处
《光子学报》
EI
CAS
CSCD
1992年第3期241-246,共6页
Acta Photonica Sinica
关键词
全息干涉法
图像处理
摄像机
Holographic interferometry
Image processing
Linear CCD camera
Plasma
