the neutron radiation field around the injector and transmission line is a pulsed field, with low duty ratio and high instantaneous dose rate.
直线加速器及其输运线周围的中子辐射场是脉沖中子辐射场,占空因子很小而且瞬时辐射水平高。
experimental results indicate that tiny feeding, low voltage, low duty ratio and high frequency have important effects to increase the truing precision.