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

Volume

2

fYear

2003

fDate

15-18 June 2003

Firstpage

763

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PPC.2003.1277923

Filename

1277923