位移电流密度

当电荷的运动速度远小于光速时，空间任意点的位移电流密度矢量的大小与位置矢量r有关，且方向与电场的方向不平行；

When the moving speed of the electric charge is far slower than velocity of light , an arbitrary point in space , whose density vector 's quantity of translocated current is related to the place vector , and its direction is not parallel with the direction of electric field ;

位移电流密度和烧毁时间随信号幅值的增大而增大，而位移电流在总电流所占的比例随信号幅值的增大而减小。

The displacement current and the burnout time increase but the proportion of the displacement current in the total current decreases with the increasing signal amplitude .

因此，在综合考虑了瞬态电离效应的光电流增加因素和位移效应的阈值电流密度衰减因素的基础上，获得了LD辐射效应综合光学响应模型。

Therefore , based on the consideration of both photocurrent increase factor due to transient ionization effects and threshold current density decrease factor due to displacement effects , we obtain an integrated LD optical response model of radiation effect .