Research On Test Technology Of Ionizing Radiation Effect Of Spacecraft Material

Co-60 gamma-ray source and 45keV electron source are used as radiation sources respectively to study the ionizing radiation effect of spacecraft material heat-shrinkable sleeve, and compare the radiation effect similarities and differences between the two radiation sources. The results show that in the damage mechanism, both gamma-rays and electrons cause ionization and excitation of electrons outside the nucleus in the material, producing ionization effects, and resulting in degradation and cross-linking of the molecular chains of the material. However, in terms of macroscopic mechanical property degradation, gamma-rays can cause complete loss of mechanical properties of material, while 45keV electrons only cause partial damage to the mechanical properties of the material. In addition, at the same dose, gamma-rays can damage the mechanical properties of the material to a greater extent than 45keV electrons. This paper explains the phenomenon and puts forward the applicable conditions of the two test technologies.