AN ELECTRON GUN

摘要

The structure of electric gun has several electronic lenses. The 1st grid (13), the 2nd grid (14) and the fouth grid are plate types and the fouth grid (16) is connected to the second grid (14) by wire. The 7KV electric potential is applied to the lower parts of the third and fifth grid and the 25KV elecric potential is maintained in the vicinity of the sixth grid through the convergence electrode (19). The first electronic lense is set between the third grid and the fouth and fifth grid, and the second electronic lense (kettle lense) being between the fifth grid and the sixth grid.