Annular-beam, 17 GHz free-electron maser experiment

Author

Earley, L.M. ; Carlsten, B.E. ; Fazio, M.V. ; Fortgang, C.M. ; Haddock, P.C. ; Haynes, W.B.

Author_Institution

Los Alamos Nat. Lab., NM, USA

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3135

Abstract

Experiments have been conducted on a 15-17 GHz free electron maser (FEM) for producing a 500 MW output pulse with a phase stability appropriate for linear collider applications. The electron beam source is a 1 μs, 800 kV, 5 kA, 6-cm-dia annular electron beam machine called BANSHEE. The beam interacts with the TM₀₂ and TM₀₃ mode Raman FEM amplifier in a corrugated cylindrical waveguide where the beam runs close to the interaction device walls to reduce the power density in the fields. This greatly reduces the kinetic energy loss caused by the beam potential depression associated with the space charge which is a significant advantage in comparison with conventional solid beam microwave tubes at the same beam current. The experiment operates in a single shot mode with a large number of diagnostics to measure power, frequency and energy

Keywords

accelerator RF systems; circular waveguides; electron accelerators; electron sources; linear colliders; masers; particle beam diagnostics; particle beam stability; space charge; 15 to 17 GHz; 5 kA; 500 MW; 6 cm; 800 kV; BANSHEE; FEM; Raman amplifier; annular-beam free-electron maser; beam diagnostics; beam potential depression; corrugated cylindrical waveguide; electron beam source; kinetic energy loss; linear collider; phase stability; single shot mode; space charge; Electron beams; Kinetic energy; Masers; Microwave devices; Power amplifiers; Pulse amplifiers; Solids; Space charge; Stability; Stimulated emission;

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.1997.753133

Filename

753133