Abstract: To study the aging character of HTPB solid propellant,PIPA(Photon Induced Positron Analysis) was presented.The positrons created by the PIPA process are formed throughout the solid propellant.The principle of PIPA was introduced along with the built-up of the PIPA system and the arithmetic method.The information of HTPB solid propellant micro change due to aging was extracted from the FWHM of 511keV spectra.There is positive correlation between the results of experiments and regular tests,indicating that PIPA is a feasible nondestructive detection method for solid propellant aging evaluation.

Key words: PIPA;HTPB solid propellant;Nondestructive detection;Aging

摘要： 引入了光致正电子湮灭分析方法 (PIPA,Photon Induced Positron Analysis),对HTPB固体推进剂老化性能进行检测研究。介绍了PIPA的原理、PIPA试验平台的搭建以及PIPA的数值处理方法,并用511KeV能谱的FWHM值ε(半高宽,Full Width Half Maximum)表征HTPB固体推进剂老化引起的微观变化,所得结论与固体推进剂的常规测试一致,证明了PIPA用于固体推进剂老化性能无损检测的可行性。

关键词: 光致正电子湮灭分析;HTPB固体推进剂;无损探伤;老化