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| SOME SECONDARY EMISSION PROPERTIES OF W-Y2O3 CERMET CATHODE |
| Bi Jian-ming |
| Beijing Vacuum Electron Devices Sesearch Institute |
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Abstract Using DC and pulse retarding field methods, we have measured the effect of in-creasing primary electron energy on the secondary emission coefficient of W-Y2O3 cermet cathode at room-temperature, and the variation of the first crossover and the maximum secondary emission coefficient (δmax) from room-temperature to 1500℃, respectively, The secondary emission properties are getting better as the temperature of the cathode rises. δmax> 7 at 1400℃. The experimental results obtained in magnetrons show that this kind of cathode is good to be used in high power magnetrons at high temperature.
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Received: 29 December 1980
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1982, Vol. 4 
