Title :
Gyro-TWTs and Gyro-BWOs with helically corrugated waveguides
Author :
Samsonov, Sergey V. ; Bratman, V.L. ; Denisov, Gregory G. ; Gachev, Igor G. ; Glyavin, Mikhail Yu ; Manuilov, V.N.
Author_Institution :
Inst. of Appl. Phys., Russian Acad. of Sci., Nizhny Novgorod
Abstract :
Recent results on low-relativistic second-harmonic gyro-devices using a microwave system in the form of a helically corrugated waveguide are presented. New Ka-band gyro-TWT is designed to operate with peak power of 100-120 kW, average power up to 10 kW and frequency bandwidth of about 10%. In the first experimental test a peak power of 130 kW, efficiency of 22-24% and bandwidth at least 2 GHz were achieved for 70-kV electron beam with pulse length up to 100 mus and repetition frequency up to 5 Hz. Frequency-tunable gyro-BWOs, attractive for some technological applications, enable CW output power of several kW at 24 GHz with smooth frequency tuning of 4-6%.
Keywords :
backward wave oscillators; gyrotrons; helical waveguides; microwave oscillators; travelling wave amplifiers; Ka-band; efficiency 22 percent to 24 percent; frequency 24 GHz; gyro-BWO; gyro-TWT; gyrotron backward wave oscillators; gyrotron traveling wave tubes; helically corrugated waveguides; low-relativistic gyro-devices; microwave system; power 10 kW; power 130 kW; second-harmonic gyro-devices; voltage 70 kV; Bandwidth; Electromagnetic waveguides; Electron beams; Frequency; Gyrotrons; Magnetic fields; Pulse amplifiers; Tuning; Voltage; Waveguide components; Gyro-TWT; broadband gyro-devices; gyro-BWO; helical-waveguide gyro-devices; helically corrugated waveguide;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516637
