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本文讨论了多芯电缆中辐射感生信号的计算模型。本模型应用蒙特卡罗法计算辐射在电缆中产生的电荷移动,并用格林函数把电荷移动转变为导体中的感应电流。这种模型可以用于任意截面几何形状和材料结构的电缆,亦可对诸如间隙、剩余空气、因剂量增强而造成的与空间位置有关的瞬时电导率、饱和以及极化作用等影响进行自洽处理。在以往的一些模型中,由于不能正确地处理或忽略这些影响,使其可用性与精度受到了限制。本文所介绍的结果指出了主要的影响是间隙、剩余空气、剂量增强和介质衬垫,还举例说明了信号在多芯电缆上的分布。
This article discusses the computational model of radiation-induced signals in multi-core cables. The Monte Carlo method is used in this model to calculate the charge transfer generated by radiation in a cable and the Green’s function is used to convert the charge transfer to the induced current in the conductor. This model can be used with cables of any cross-sectional geometry and material construction and self-consistent with influences such as gaps, residual air, spatial position-dependent transient conductivity, saturation and polarization due to dose enhancement deal with. In some previous models, their usability and accuracy were limited by the inability to properly handle or ignore these effects. The results presented in this paper indicate that the main effects are gaps, residual air, dose enhancement, and media liners, as well as the signal distribution over multi-conductor cables.