PURPOSE: To produce a linear electron beam having uniform current density and energy from one end to the other of a linear hot cathode, by bringing the opposite ends of linear hot cathode to equi-potential during electron emission interval.
CONSTITUTION: On-interval of a switching transistor Tr1 (where Tr2, Tr3 are OFF) is the heating interval of hot cathode 1 to flow the heating current through power source V1→Tr1→diode 6→power source V1. On-interval of Tr2, Tr3 (where Tr1 is OFF) is the electron emission interval where the hot cathode heating current is interrupted to apply negative voltage across the hot cathode. When applying negative potential of equi-potential across the hot cathode during electron emission interval in such a manner, electrons emitted from the hot cathode is fed from the opposite ends of hot cathode to reduce the voltage drop in the hot cathode.
WATANABE MASANORI
NONOMURA KINZOU
KATSUYAMA MINORU
HIRANO RIYUUMA
| JPS54143062A | 1979-11-07 | |||
| JPS4924222U | 1974-03-01 |
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