High efficiency TWT amplifiers

Author

Naqvi, S. ; Kerslick, G.S. ; Nation, J.A. ; Wang, Q.

Author_Institution

Sch. of Electr. Eng. & Lab. of Plasma Studies, Cornell Univ., Ithaca, NY, USA

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3117

Abstract

We report on a research program to increase the efficiency of relativistic traveling wave amplifiers to >50%. The two stage amplifier consists of a bunching periodic structure with phase velocity significantly higher than the beam velocity and a decelerating section with phase velocity significantly lower than the beam velocity. The position of the decelerating stage with respect to the bunching stage is chosen such that the narrowest bunches are sustained in the decelerating field for the longest possible time before significant debunching occurs. Two schemes are under investigation. In the first scheme, a resistive server is placed between the two stages to suppress temporal phenomena. In the second scheme, the bunching and deceleration stages merge into each other by a gradual change in the iris radius over a wavelength

Keywords

accelerator RF systems; microwave generation; particle beam bunching; travelling wave amplifiers; accelerator RF system; bunching periodic structure; debunching; deceleration stages; high efficiency TWT amplifiers; iris radius; microwave source; phase velocity; relativistic traveling wave amplifiers; resistive server; two stage amplifier; Coaxial components; Electromagnetic fields; Electron beams; Energy conversion; Geometry; Iris; Klystrons; Laboratories; Plasma waves; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753127

Filename

753127