Title :
Design of a gridded electron gun for traveling-wave tubes: An EGUN case study
Author :
Xavier, César C. ; Motta, Cláudio C.
Author_Institution :
Inst. de Pesquisas Energeticas e Nucl., CNEN-SP, Sao Paulo, Brazil
Abstract :
A design procedure of a 0.7 muPerv electron gun, with grid and shadow grid, under space charge-limited flow to be used in traveling-wave-tube (TWT) is presented. The EGUN was used to determine the self-consistent electric fields for the electron beam and, as a result, it was obtained a current/perveance growth as the grid voltage increased and the cathode-to-anode spacing decreased. This behavior was observed when grid voltages and cathode-to-anode spacing were varied from 0-600 V and 0.8-1.2 mm, respectively.
Keywords :
electric fields; electron guns; travelling wave tubes; EGUN; cathode-to-anode spacing; electric fields; electron beam; grid voltages; gridded electron gun; size 0.8 mm to 1.2 mm; space charge-limited flow; traveling-wave tubes; voltage 0 V to 600 V; Anodes; Cathodes; Current density; Electrodes; Electron beams; Electron tubes; Solid modeling; Temperature measurement; Vacuum systems; Voltage; EGUN; TWT; electron gun; space-charge-limited flow;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193482
