Cherenkov maser experiments based on a 2D Periodic Surface Lattice

Author

Phipps, A.R. ; MacLachlan, A.J. ; Robertson, C.W. ; Konoplev, I.V. ; Ronald, K. ; Cross, A.W. ; Whyte, C.G. ; Phelps, A.D.R.

Author_Institution

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

fYear

2015

fDate

24-28 May 2015

Firstpage

1

Lastpage

1

Abstract

Numerical finite difference time domain and Particle-In-Cell simulations have demonstrated an electron wave interaction in a Cherenkov maser utilizing a cylindrical two-dimensional (2D) Periodic Surface Lattice (PSL) as a mode selective cavity [1-8]. Optimization of this structure´s physical properties resulted in the design of a cavity with 16 longitudinal periods of 1.6 mm length, 7 azimuthal variations and an unperturbed inner radius of 4 mm. In numerical simulations this design produces an output power of 300 kW with 10 % efficiency at a frequency of 103.6 GHz. A proof of principle experiment demonstrating electron beam interaction with a wave formed when the volume field and surface field are coupled in an oversized 2D PSL cavity will be presented. The application of PSLs has the potential to deliver high average power, efficient, compact electromagnetic wave sources in the challenging THz frequency range.

Keywords

Cherenkov radiation; electron beams; finite difference time-domain analysis; masers; optical design techniques; optical lattices; periodic structures; Cherenkov maser experiments; PSL; cylindrical two-dimensional periodic surface lattice; electron beam interaction; electron wave interaction; finite difference time domain simulation; mode selective cavity; particle-in-cell simulation; Cavity resonators; Electron beams; Finite difference methods; Lattices; Masers; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Sciences (ICOPS), 2015 IEEE International Conference on

Conference_Location

Antalya

Type

conf

DOI

10.1109/PLASMA.2015.7179738

Filename

7179738