Title :
Design of sheet beam electron gun
Author :
Raju, R.S. ; Barik, R.K. ; Banerjee, J. ; Bhomia, Princy
Author_Institution :
Central Electron. Eng. Res. Inst., Pilani
Abstract :
Sheet beam is employed in THz devices as the beam offers an effective interaction with the RF signal. Sheet beam gun design is a challenge in achieving required flatness and laminarity over the length of RF-beam interaction. As per the published literature, sheet beam shape is obtained by using complicated shapes of cathode, BFE and anode. In the present work a planar gun geometry has been proposed. It was found that the shape of BFE has a critical bearing on the laminarity of beam. The BFE having a dumbbell shape and the anode having a rectangular slit produced good laminar beam. The work on single gun has been extended to obtain twin beams which are oppositely directed. The results are encouraging.
Keywords :
electron guns; submillimetre wave tubes; terahertz wave devices; RF signal; RF-beam interaction; THz devices; beam forming electrode; beam laminarity; counter-streaming electron beam oscillator; planar gun geometry; rectangular slit; sheet beam electron gun; Anodes; Cathodes; Electrodes; Electron beams; Geometry; Microwave devices; Radio frequency; Shape; Solid modeling; Space charge; Beam Forming Electrode (BFE); Counter-Streaming Electron Bean Oscillator (CSEBO); Sheet Beam Electron Gun (SBEG); Tera Hertz (THz) Device;
Conference_Titel :
Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on
Conference_Location :
Jaipur
Print_ISBN :
978-1-4244-2690-4
Electronic_ISBN :
978-1-4244-2691-1
DOI :
10.1109/AMTA.2008.4763195
