Title :
Efficient wide-band gyro-TWT with helically grooved waveguide
Author :
Bratman, V.L. ; Cross, A.W. ; Denisov, G.G. ; He, W. ; Phelps, A.D.R. ; Ronald, K. ; Samsonov, S.V. ; Whyte, C.G. ; Young, A.R.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
Experimental results are presented for a broadband gyrotron travelling wave tube (gyro-TWT) based on a new microwave system in the form of a cylindrical waveguide with a helical corrugation of the inner surface. The corrugation radically changes the wave dispersion resulting in appearance of an eigenwave of constant group velocity in the region of close-to-zero axial wavenumber. For a gyro-TWT such a dispersion characteristic permits operation with significantly increased bandwidth and reduced sensitivity to electron-beam axial velocity spread.
Keywords :
circular waveguides; dispersion (wave); gyrotrons; microwave tubes; millimetre wave tubes; travelling wave amplifiers; travelling wave tubes; 36.5 GHz; 8.4 to 10.4 GHz; bandwidth improvement; broadband operation; constant group velocity eigenwave; cylindrical waveguide; dispersion characteristic; electron-beam axial velocity spread; gyrotron travelling wave tube; helical corrugation; helically grooved waveguide; sensitivity reduction; wave dispersion; wideband gyro-TWT; Cyclotrons; Electron beams; Frequency measurement; Magnetic field measurement; Physics; Power generation; Resonance; Surface waves; Waveguide components; Wideband;
Conference_Titel :
Vacuum Electronics Conference, 2000. Abstracts. International
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-5987-9
DOI :
10.1109/OVE:EC.2000.847531
