Ut-battelle, Inc.

The University of Chicago

Yoon W Kang

John G Hoyt

Steve W Berg

George A Goeppner

Terry L Smith

Joshua L Wilson

William Yoder

Aly E Fathy

Arthur E Grelick

Wayne Michalek

A waveguide having a non-conductive material with a high permeability (&#x3bc;, &#x3bc;for relative permeability) and/or a high permittivity (&#x2208;, &#x2208;for relative permittivity) positioned within a housing. When compared to a hollow waveguide, the waveguide of this invention, reduces waveguide dimensions by The waveguide of this invention further includes ridges which further reduce the size and increases the usable frequency bandwidth.

Radio frequency (RF) microwave components and subsystems using loaded ridge waveguide

A rapidly twisted electromagnetic accelerating structure includes a waveguide body having a central axis, one or more helical channels defined by the body and disposed around a substantially linear central axial channel, with central portions of the helical channels merging with the linear central axial channel. The structure propagates electromagnetic waves in the helical channels which support particle beam acceleration in the central axial channel at a phase velocity equal to or slower than the speed of light in free space. Since there is no variation in the shape of the transversal cross-section along the axis of the structure, inexpensive mechanical fabrication processes can be used to form the structure, such as extrusion, casting or injection molding. Also, because the field and frequency of the resonant mode depend on the whole structure rather than on dimensional tolerances of individual cells, no tuning of individual cells is needed. Accordingly, the overall operating frequency may be varied with a tuning/phase shifting device located outside the resonant waveguide structure.

Slow wave structures using twisted waveguides for charged particle applications

An RF window and a method of manufacture of the RF window are provided. The RF window of the invention has very low reflected RF power. The RF window includes a center sleeve assembly including a ceramic disc mounted within a copper sleeve. The ceramic disc has opposed surfaces, a ceramic surface coating is applied to each of the opposed surfaces. The ceramic surface coatings are selected for a particular application of the RF window. A pair of end assemblies is removably assembled with the center sleeve assembly. An end assembly mating face is arranged for adjustable slip fit engagement within the copper sleeve of the center sleeve assembly to define a respective cavity on opposed sides of the ceramic disc with the mating face positioned at an adjusted position. An intermediary ring is fixedly secured to the end assembly with the mating face at the adjusted position.

Enhanced RF window for waveguide used with particle accelerator

Growing community of inventors

Knoxville, TN, United States of America

Yoon W Kang