TY - JOUR
T1 - Experimental and computational studies of novel coaxial 2D Bragg structures for a high-power FEM
AU - Konoplev, I.V
AU - Phelps, A.D.R
AU - Cross, A.W
AU - Ronald, K
AU - McGrane, P
AU - He, W
AU - Whyte, C.G
AU - Ginzburg, N.S
AU - Peskov, N.Yu
AU - Sergeev, A.S
AU - Thumm, M
PY - 2004/8/1
Y1 - 2004/8/1
N2 - Two-dimensional (2D) coaxial Bragg structures have been suggested for use in high-power Free Electron Masers (FEM) to synchronize radiation from different parts of an oversized annular electron beam. In this paper, the simulations of field evolution using the three-dimensional code MAGIC are carried out and results are presented. An investigation of 2D Bragg structures obtained by corrugating the inner surface of the outer conductor of a coaxial waveguide or by lining the surface of a smooth waveguide with a dielectric material, which has a bi-periodic permittivity, has been conducted. Experimental studies of 2D Bragg structures were also undertaken and the good agreement between experimental measurements and theoretical predictions is demonstrated. Measurements of a 7 cm diameter annular electron beam produced by a high-current accelerator to be used to drive the FEM are presented and the experimental set-up discussed.
AB - Two-dimensional (2D) coaxial Bragg structures have been suggested for use in high-power Free Electron Masers (FEM) to synchronize radiation from different parts of an oversized annular electron beam. In this paper, the simulations of field evolution using the three-dimensional code MAGIC are carried out and results are presented. An investigation of 2D Bragg structures obtained by corrugating the inner surface of the outer conductor of a coaxial waveguide or by lining the surface of a smooth waveguide with a dielectric material, which has a bi-periodic permittivity, has been conducted. Experimental studies of 2D Bragg structures were also undertaken and the good agreement between experimental measurements and theoretical predictions is demonstrated. Measurements of a 7 cm diameter annular electron beam produced by a high-current accelerator to be used to drive the FEM are presented and the experimental set-up discussed.
KW - free electron masers
KW - 2D feedback
KW - microwaves
KW - annular e-beam
UR - https://www.sciencedirect.com/science/journal/01689002
U2 - 10.1016/j.nima.2004.04.027
DO - 10.1016/j.nima.2004.04.027
M3 - Article
SN - 0168-9002
VL - 528
SP - 101
EP - 105
JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
ER -