Title :
Computational method for the dispersion relation of a pulsed Cerenkov free electron maser system
Author :
Petichakis, C. ; Stuart, R.A. ; Al-Shamma´a, A.I. ; Lucas, J.
Author_Institution :
Dept. of Electr. Eng. & Electron., Liverpool Univ., UK
Abstract :
We have constructed a Cerenkov maser oscillator designed to operate at 16.9 GHz with a solid electron beam accelerated to 70 kV, using an alumina tube, fitted into a copper pipe. The measurements of the dispersion curves for such a cavity of various dielectrically loaded structures are presented. A method for calculating efficiently the dispersion curve of a cylindrical Cerenkov free electron device having a small gap between the dielectric liner and the waveguide wall is also described. In any practical realisation, such a gap cannot be avoided and the results obtained here indicate that the dispersion curve can be very sensitive to its thickness.
Keywords :
alumina; dispersion relations; free electron lasers; masers; oscillators; 16.9 GHz; 70 kV; Cerenkov maser oscillator; alumina tube; copper pipe; cylindrical Cerenkov free electron device; dielectric liner; dispersion curves; solid electron beam; waveguide wall; Acceleration; Copper; Dielectric measurements; Dispersion; Electron beams; Electron devices; Electron tubes; Masers; Oscillators; Solids;
Conference_Titel :
Pulsed Power Conference, 2003. Digest of Technical Papers. PPC-2003. 14th IEEE International
Conference_Location :
Dallas, TX, USA
Print_ISBN :
0-7803-7915-2
DOI :
10.1109/PPC.2003.1277923
