Space charge behavior of polyimide at cryogenic temperatures

In this paper, the space charge behavior of polyimide at cryogenic temperatures is studied. The pulsed electro-acoustic (PEA) and thermally stimulated current (TSC) methods are exploited to evaluate the space charge distribution, quantification of space charge accumulation and trap characteristics of polyimide. The results show that the change of space charge accumulation at 273 to 123 K is divide...