Coaxial 2D-1D two-mirror cavity free-electron maser experiment

Author

MacInnes, P. ; Konoplev, I.V. ; Cross, A.W. ; He, W. ; Phelps, A.D.R. ; Whyte, C.G. ; Ronald, K. ; Robertson, C.W. ; Thumm, M.

Author_Institution

Dept. of Phys., Univ. of Strathclyde, Glasgow

fYear

2008

fDate

15-19 June 2008

Firstpage

1

Lastpage

1

Abstract

This paper presents an overview of a coaxial free-electron maser (FEM) based on 2D and 1D distributed feedback, driven by a large diameter (70 mm) annular electron beam. Most recent experimental results and numerical simulations are presented and discussed. Particle in cell (PiC) code MAGIC is used to demonstrate the possibility to control the operating mode and frequency of the output radiation. From numerical simulation, it is possible to tune the FEM output in the frequency range associated with the band gap of the input mirror. FEM generated ~60 MW, 150 ns duration millimeter wave pulses, containing ~12 J of energy in the pulse, when operated in 35.9-38.9 GHz frequency region.

Keywords

energy gap; masers; mirrors; 1D distributed feedback; 2D distributed feedback; annular electron beam; band gap; coaxial free-electron maser; frequency 35.9 GHz to 38.9 GHz; mirror cavity; operating mode; particle in cell; Coaxial components; Distributed feedback devices; Electron beams; Frequency synchronization; Helium; Masers; Numerical simulation; Periodic structures; Photonic band gap; Physics;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2008. ICOPS 2008. IEEE 35th International Conference on

Conference_Location

Karlsruhe

ISSN

0730-9244

Print_ISBN

978-1-4244-1929-6

Electronic_ISBN

0730-9244

Type

conf

DOI

10.1109/PLASMA.2008.4590606

Filename

4590606