Dielectric Bragg accelerator

It is demonstrated that a planar Bragg reflection waveguide consisting of a series of dielectric layers may form an acceleration structure. It is shown that an interaction impedance per wavelength of over 100/spl Omega/ is feasible with existing materials, Silica (/spl epsiv/ = 2.1) and Zirconia (/spl epsiv/ = 4), and if materials of high dielectric coefficient become available in the future, they may facilitate an interaction impedance per wavelength closer to 500/spl Omega/.