Title :
Experimental study of gyrotron efficiency enhancement by improvement of electron beam quality
Author :
Louksha, Oleg I. ; Piosczyk, Bernhard ; Samsonov, Dmitriy B. ; Sominski, Gennadi G. ; Thumm, Manfred K.
Author_Institution :
St. Petersburg State Polytech. Univ. (SPbSPU), St. Petersburg
Abstract :
The methods for suppressing parasitic low- frequency oscillations (LFOs) have been applied to improve electron beam quality in a 4-mm 100-kW gyrotron. In the conditions of suppressed LFOs and of high cathode emission uniformity, the stable operation of this gyrotron at pitch factor values high than 1.5 has been achieved. As a result, the efficiency of the gyrotron at the main TE12,3 mode has been increased from 32 % (corresponds to the designed regime with pitch factor of 1.28) up to 42 %.
Keywords :
cathodes; electron beams; emission; gyrotrons; oscillations; cathode emission uniformity; efficiency 32 percent to 42 percent; electron beam quality; gyrotron efficiency enhancement; parasitic low- frequency oscillations; power 100 kW; size 4 mm; Antenna measurements; Cathodes; Electron beams; Electron traps; Gyrotrons; Magnetic analysis; Magnetic field measurement; Magnetic fields; Pulse measurements; Strips; Emission uniformity; gyrotron efficiency; nonuniform fields; space-charge oscillation;
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.2007.4516774
