Radiation effect of keV protons on optical properties of aluminized Kapton film

Effects of proton radiation on aluminized Kapton films were investigated through ground simulation experiments, in which the energy of protons was 90 keV and the flux was 5.0×1011 cm−2 s−1. Changes in optical properties and microstructure were analyzed by using UV/VIS and FTIR spectroscopic techniques. It is shown that proton radiation results in the degradation of the reflective property in the 500–1200 nm range due to the formation of new chromophores and auxochromes during irradiation. The optical energy gap Eg of the irradiated Kapton film, which establishes the relationship between microstructure and optical property, was obtained from Tauc's plots.