Title :
Broadband, high power, gyrotron travelling wave amplifier experiments
Author :
Ronald, Kevin ; Bratman, Vladimir L. ; Cross, Adrian W. ; Denisov, Gregory G. ; Phelps, Alan D. R. ; Samsonov, Sergey V. ; Young, Alan R. ; Whyte, Colin G.
Author_Institution :
Dept. of Phys. & Appl. Phys., Strathclyde Univ., Glasgow
Abstract :
The authors present the first bandwidth measurements of a novel gyrotron amplifier. Coupling between the second harmonic cyclotron mode of a gyrating electron beam and the radiation field was achieved in the region of near infinite phase velocity over a broad bandwidth by exploiting a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 1.1 MW, saturated gain of 37 dB, linear gain of 47 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth) and an efficiency of 29%. These results were in good agreement with theoretical predictions
Keywords :
gyrotrons; 1.1 MW; 185 keV; 29 percent; 8.4 to 10.4 GHz; bandwidth measurements; beam energy; broad bandwidth; cylindrical waveguide; gyrating electron beam; gyrotron travelling wave amplifier; helical corrugation; linear gain; maximum output power; near infinite phase velocity; radiation field; saturated bandwidth; saturated gain; second harmonic cyclotron mode;
Conference_Titel :
Pulsed Power 2000 (Digest No. 2000/053), IEE Symposium
Conference_Location :
London
DOI :
10.1049/ic:20000274
