Noun
the emission of electrons from a surface that is bombarded by higher energy primary electrons
Source: WordNetAnother undesirable consequence of secondary emission is that in extreme cases enough charge can flow to the screen grid to overheat and destroy it. Source: Internet
In a triode this so-called secondary emission of electrons is not important since they are simply re-captured by the more positive anode (plate). Source: Internet
In an atomic bomb, this heat may serve to raise the temperature of the bomb core to 100 million kelvin and cause secondary emission of soft X-rays, which convert some of this energy to ionizing radiation. Source: Internet
Later tetrodes had anodes treated to reduce secondary emission; earlier ones such as the type 77 sharp-cutoff pentode connected as a tetrode made better dynatrons. Source: Internet
At certain values of plate voltage and current, the tetrode characteristic curves are kinked due to secondary emission. Source: Internet
The solution was to add another grid between the screen grid and the main anode, called the suppressor grid (since it suppressed secondary emission current toward the screen grid). Source: Internet