Title :
Experimental investigation of electron gun with nanostructured carbon cathode
Author :
Chakhovskoi, A.G. ; Galdetskiy, A.V. ; Obraztsov, A.N. ; Volkov, A.P.
Author_Institution :
California Univ., Davis, CA
Abstract :
Carbon cold cathodes are attractive for use in microwave tubes and many other applications due to their stability, low cost, and potential for high current operation in poor vacuum. Preliminary experiments have demonstrated current densities of 0.1-0.5 A/cm2 from emitters on flat substrates (silicon or molybdenum) having an area up to 1 cm2. However for microwave applications much greater current density is required. The primary goal of the present work was to demonstrate an electron gun with the spherical cathode allowing a compression of the electron beam
Keywords :
carbon; cathodes; current density; electron field emission; electron guns; electron optics; elemental semiconductors; microwave tubes; molybdenum; nanostructured materials; silicon; substrates; vacuum microelectronics; C-Mo; C-Si; Mo; Si; carbon cold cathodes; current density; electron beam compression; electron gun; emitters; flat substrates; high current operation; microwave applications; microwave tubes; nanostructured carbon cathode; spherical cathode; Anodes; Carbon dioxide; Cathodes; Current density; Electron beams; Feedback circuits; Fluctuations; Laser beams; Substrates; Voltage;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2005. IVNC 2005. Technical Digest of the 18th International
Conference_Location :
Oxford
Print_ISBN :
0-7803-8397-4
DOI :
10.1109/IVNC.2005.1619557
