Title :
Free-electron maser based on two-dimensional distributed feedback
Author :
Phelps, A.D.R. ; Konoplev, I.V. ; Cross, A.W. ; Maclnnes, P. ; He, W. ; Ronald, K. ; Whyte, C.G. ; Robertson, C.W. ; Thumm, M.
Author_Institution :
Dept. of Phys., Strathclyde Univ., Glasgow
Abstract :
The study of a co-axial free-electron maser (FEM) based on 2D and ID distributed feedback and driven by a large diameter (70 mm), annular electron beam is presented. It has been demonstrated that 2D distributed feedback in the input mirror allowed 8 mm radiation emitted from different parts of the oversized electron beam to be synchronized. The FEM operating in the (35.9 GHz to 38.9 GHz.) frequency region generated 60 MW, 150 ns duration millimetre wave pulses which contained ~9 J of energy in the pulse. Good agreement between theoretical predictions and experimental data is demonstrated.
Keywords :
distributed feedback lasers; masers; 2D distributed feedback; co-axial free-electron maser; energy 9 J; frequency 35.9 GHz to 38.9 GHz; oversized electron beam; power 60 MW; size 70 mm; time 150 ns; Distributed feedback devices; Electron beams; Frequency; Masers; Mirrors; Periodic structures; Power transmission lines; Pulse shaping methods; Pulsed power supplies; Voltage; Distributed Bragg reflector masers; Distributed feedback oscillators; Electron beams; Free electron masers;
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.2007.4516752
