摘要
利用光纤传输光信号，对二级轻气炮发射后靶室内的杂质光谱进行了探测。这种杂质谱大致包含了高温废气的热辐射谱、一些杂质原子激发后产生的特征谱和分子振动带谱。杂质辐射持续的时间大约为９０ｍｓ。利用这种测试手段，还获得了塑料样品的冲击发射光谱。杂质辐射和弹丸碰靶后样品的冲击辐射在时间上是相互重叠的。由于材料在冲击作用下的不透明性，废气的热辐射基本上不会干扰对冲击材料发射光谱的探测。
The measured results of the impurity spectra in the tank of a two-stage light gas gun are intreduced in this papor. The light signal is delivered to the entrance slit of an OMA system by a 25-m-long, lmm in diameter plastics optical fiber. In our experiment,the 400～700nm thermal radiation continuous spectra from the waste gas lasts about 90ms,the characteristic line spectra of some atoms and the CO2 molecule band spectra are oberved. There exists an absorption spectrum of the plastics fiber at 631. 25nm. In the experiment the emission spectra of plastic specimen is measured.it is observed that the thermal radiance of the waste gas is shielded by the specimen and only the characteristic radiation of some impurity is able to disturb the measurement of the radiation for the specimen.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1996年第1期75-79,共5页
Explosion and Shock Waves
关键词
轻气炮
冲击光谱
杂质光谱
靶室
ss:two stage light gas gun,shocked spectrum,impurity spectrum
