PERFORMANCE INVESTIGATION FOR NANOCARBON MODIFIED DISPENSER CATHODE
The article provides characteristics of dispenser cathodes with admixture of nanocarbon particles, i.e. sulfoadduct of carbon nanoclusters (Ugleron®), into active material and polyhedral multilayer carbon nanostructures of the fulleroid type and toroidal shape (Astralenes®) into tungsten...
| Published in: | Известия высших учебных заведений России: Радиоэлектроника |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | Russian |
| Published: |
Saint Petersburg Electrotechnical University "LETI"
2018-08-01
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| Subjects: | |
| Online Access: | https://re.eltech.ru/jour/article/view/249 |
| Summary: | The article provides characteristics of dispenser cathodes with admixture of nanocarbon particles, i.e. sulfoadduct of carbon nanoclusters (Ugleron®), into active material and polyhedral multilayer carbon nanostructures of the fulleroid type and toroidal shape (Astralenes®) into tungsten matrix. The emitters are considered as electron sources for modern microwave devices, in particular travelling wave tube. The results of their accelerated life tests. Emission capacity measurement results are provided. A comparative x-ray analysis of modified and typical cathode emitting surfaces and respective anodes is presented. The morphology features of DC metal matrix with admixture of carbon nanoparticles are mentioned. Moreover, resistance of nanocarbon modified cathodes to operation under insufficient vacuum conditions is investigated.It is concluded that the further study of nanocarbon modi-fied thermal cathode parameters, e.g. electron work function and active substance evaporation rate with Ugleron®, is reasonable. Recommendations on further improvement of dispenser cathodes manufacturing technology with admixture of nanocarbonic particles. |
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| ISSN: | 1993-8985 2658-4794 |