Автоэмиссионные катоды

The synthesis of carbon nanotubes is carried out on the surface of molybdenum substrates by CVD-method using thin-film iron and water solutions of ferritin and iron acetate as catalysts sources. It is found that the temperature of process technology in the synthesis of carbon nanotubes on molybdenum substrates must be above 900 ◦C. At this point, only non-uniform films of carbon nanotubes on the surface of molybdenum substrates were obtained.

Some results of researches and development of devices with field emission (TWT, BWO, carcinotrode, klystrons and X-ray tubes, field emission displays, etc.) have been briefly presented in the article. Lines of development of its theory have been designated. Also the vacuum microwave electronics programs offered in Europe and USA have been considered. They are directed on using new technologies in coping with the terahertz frequency range, reflecting the trend of recent years.