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| RESEARCH ON ELECTRON INITIAL VELOCITY DISTRIBUTION OF PRACTICAL THERMIONIC CATHODES |
| Wang Shengning Wang Shushen Yang Lingyun |
| Institute of Electronics;Academia Sinica |
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Abstract Electron initial velocity distribution of two kinds of parctical thermionic cathodes are studied with "pre-acclerating-post-deaccelerating type retarding field method. Based on the theory of dynamical surface emission centers, the phenomenon, i.e. the electron initial velocity distribution of the oxide-coated cathode splits into spectrums under strong pulse ele-ctric field, is explained.
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Received: 23 September 1982
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1984, Vol. 6 
