16.2.3 电子倍增和光电倍增管(MPT) 为了测量和探测的需要,光电管的输出常需要加以放大。毫无疑问,这种放大会增加信号的噪声,不过噪声究竟增加多少则取决于放大方法(见第16.2.4节)。电子倍增是噪声比较低的放大方法,因此往往常用 16.2.3 Electron multiplier and photomultiplier tube (MPT) In order to measure and detect the need, the photoelectric tube output often needs to be enlarged. There is no doubt that this amplification will increase the signal noise, but how much noise increases depends on the amplification method (see 16.2.4). Electronic multiplication is a relatively low noise amplification method, it is often used