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In order to enhance the emission current, reduce the operating temperature and prolong the lifetime of the pure W filament cathode for application in high-power (i.e., more than 10KW) continuous wave magnetron tube, a novel Y2O3-Gd2O3-HfO2 impregnated W base direct-heated cathode (Y-Gd-Hf-O impregnated cathode) has been developed. At 1700°br, the dc emission density of the Y-Gd-Hf-O impregnated cathode...
In order to enhance output power and prolong lifetime of the high-power continuous wave magnetron tubes, a novel La2Zr2O7 impregnated cathode is adopted to enhance the thermionic emission. In this abstract, we compare the thermionic emission ability of this cathode with traditional pure W filament cathode. Experimental results show that this cathode can provide the same thermionic emission with at...
In this paper we mainly describes the research progress in a kind of ammonium perrhenate impregnated Ni sponge oxide cathode, which includes the preparation of Ni-Re sponge layer by impregnated ammonium perrhenate solution and the cathode properties testing. The testing results show that the pc emission current density of the cathode reaches 35.6A/cm2 with a 10μs pulse width at a temperature of 850U...
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