A re doped Y2O3-Gd2O3-HfO2 W base direct-heated cathode

In this paper we mainly describe the research progress in a kind of Re doped Y
₂
O
₃
-Gd
₂
O
₃
-HfO
₂
W base direct-heated cathode, which includes the emission current and the lifetime testing of the cathode. The test results show that the DC emission is beyond 3.23A/cm
²
at 1500 °Cbr. The lifetime is reached 4000h with a DC load 1.5A/cm
²
at 1600 °Cbr. And the anti-electron-bombing characteristic of the cathode is also studied. Experimental results show that the cathode has good anti-electron-bombing capability.