The long-term stability of plastic scintillator for electromagnetic particle detec-tors

摘要

In order to study the long-term stability of plastic scintillator (PS) for the LHAASO-KM2A, an experimenthas been done to simulate the Yangbajing environment, where the temperature around the tested scintillator is in largedynamic variation. The attenuation length of light and the light output are measured to monitor the quality variationof scintillator. In addition, accelerated thermal aging tests of scintillator are also made. Here the PS operational timecan be estimated and its lifetime is determined from an Arhenius plot.