Characteristics of charge and discharge of PMMA samples due to electron irradiation*
Feng Guo-Baoa), Wang Fanga), Hu Tian-Cunb), Cao Menga)
       
Transient characteristics of charge and discharge processes of the PMMA sample. (a) Variations of leakage current J L and displacement current J D with time t . T C is the discharge time. (b) Variations of internal charge quantity Q t and surface potential V S with time t .