摘要
对电缆X射线辐照非线性响应进行了数值模拟。分析了电缆X射线辐照的物理过程,针对同轴电缆和屏蔽多导体电缆,建立了基于有限元方法的二维电缆模型诺顿等效电流源计算方法,着重描述了二维模型下电缆介质辐射感应电导率效应求解方法,模拟了电缆X射线辐照非线性效应,给出了诺顿等效电流源非线性响应规律,并依据物理过程进行了合理性分析。模拟结果显示,由于辐射感应电导率的存在,随着X射线注量的增加,电缆响应幅度会存在明显的饱和现象。对特定类型的电缆,响应电流随着X射线注量增加,依次出现3个时间位置不同的电流峰值。
Nonlinear response of cable irradiated by X-ray is simulated using numerical method.The physical processes of the X-ray irradiating to cable are analyzed.Norton-equivalent driver model is built up for coaxial cable or shielded multi-cable based on 2-dimension finite-element method,focusing on dielectric＇s radiation-induced conductivity effect.The nonlinear responses of Norton-equivalent driver are calculated and their regularities are concluded in detail.The simulation result showed that the current amplitude would reach a saturation value as the X-ray fluence increased when induced conductivity existed.For some types of cable,there would be 3different current peaks appearing successively at different point on the waveform while the X-ray fluence increased.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2016年第11期83-88,共6页
High Power Laser and Particle Beams
基金
强脉冲辐射环境模拟与效应国家重点实验室专项经费资助项目(SKLIPR.1210)
关键词
辐射感应电导率
X射线辐照响应
电缆
数值模拟
radiation-induced conductivity
response of X-ray irradiation
cable
numerical simulation
