Open AccessLeakage current characteristics of the insulating sample under high-energy electron irradiation
Author(s) -
Wei-Qin Li,
Ding Liu,
Haibo Zhang
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.227303
Subject(s) - electron , irradiation , materials science , leakage (economics) , electron beam processing , cathode ray , atomic physics , current (fluid) , scattering , trapping , optics , physics , nuclear physics , thermodynamics , economics , macroeconomics , ecology , biology
The leakage current characteristics of an insulating sample under high-energy electron beam irradiation are simulated by a numerical model with taking into account the electron scattering, transport, trapping and self-consistent field.The leakage current is measured by using a detection platform. Results show that under the continuous electron beam irradiation, the total electron yield decreases evidently; because of electron transport, the sample near the surface is positively charged weakly and its interior is negatively charged strongly; some electrons are transported downward, forming the electron beam induced current and the leakage current under the long time irradiation. Under the irradiation, the leakage current increases to a stable level gradually. The leakage current decreases with the increase of sample thickness, but it increases with beam energy and current.