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A traveling wave tube (TWT) based on carbon nanotube (CNT) cold cathode is theoretically researched in this paper. A magnetic injection electron gun and helix slow-wave structure is adopted in the TWT. Simulation results show that the maximum output power of the CNT TWT can reach 54 W at 9.4 GHz with an input power of 50 mW, corresponding to the maximum gain of 30 dB, when the gyrating electron beam...
In order to develop field emission cold cathode radiation source devices, a gridded carbon nanotube (CNT) cold cathode electron gun is theoretically and experimentally investigated in this letter. The planar grid and annular CNT cold cathode are used and optimal parameters of a high-compression-ratio electron gun are obtained by particle in cell simulation software. A 4-mA/10-kV annular electron beam...
Fabrication of carbon nanotube cold cathode requires an efficient and low cost process. In the paper, carbon nanotube is direct synthesized on stainless steel which acts as cathode substrate and catalyst for growing carbon nanotube. The best type of stainless steel is chosen and investigated its effect on the synthesis quality of carbon nanotube. The field emission character of carbon nanotube on...
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