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

摘要

In this paper we mainly describe the research progress in a kind of Re doped Y₂O₃-Gd₂O₃-HfO₂W 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/cm²at 1500 °Cbr. The lifetime is reached 4000h with a DC load 1.5A/cm²at 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.