The secondary backscattered electron current is used to modulate the intensity of an electron beam in a cathode ray tube(crt) . 二次电子或背散射电子的电流被用来调制阴极射线管（CRT）中电子束的强度。
2.
The secondary backscattered electron current is used to modulate the intensity of an electron beam in a cathode ray tube ( crt ) 二次电子或背散射电子的电流被用来调制阴极射线管（ crt ）中电子束的强度。
3.
2 . the transport of a relativistic - electron - beam ( reb ) in dense plasmas with a cold return electron current is examined by theory and particle simulation 2 、系统地研究了高能电流在稠密等离子体内输运的复杂的非线性过程。
