Title :
Internal charging in low density polyethylene irradiated by energetic electrons
Author :
Zhao, Ni ; Min, Daomin ; Li, Shengtao ; Zheng, Xiaoquan
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
Basing on the range theory of European Space Agency (ESA) and Touzin´s charge deposition theories, a 1-D internal charging model has been employed in simulating the effects of incident electron flux (IEF) and irradiation time on deep dielectric charging (DDC). It is calculated that the distribution of electric field, conductivity and space charge under both different IEF and time. The results indicate there is an IEF threshold, about 2.0×1012/m2s, on which conductivity mechanism changes and the development velocity of electric field distortion decreases. Moreover, thermal assisted hopping conductivity (TAH) is the vital influence factor of the internal charging/discharging. The results are useful for understanding the mechanism of charge transport and internal charging/discharging phenomenon.
Keywords :
polyethylene insulation; thermal conductivity; DOC; ESA; European Space Agency; IEF; LDPE; TAH; Touzin charge deposition theory; charge transport mechanism; deep dielectric charging; development velocity; electric field distortion; electric field distribution; energetic electrons; incident electron flux; internal charging-discharging model; low density polyethylene irradiation; thermal assisted hopping conductivity; Analytical models; Radio access networks; Surface charging; Conductivity; Internal charging; LDPE; Space charge;
Conference_Titel :
Properties and Applications of Dielectric Materials (ICPADM), 2012 IEEE 10th International Conference on the
Conference_Location :
Bangalore
Print_ISBN :
978-1-4673-2852-4
DOI :
10.1109/ICPADM.2012.6318936
