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Title: Dispersion-free radial transmission lines

Patent ·
OSTI ID:1016725

A dispersion-free radial transmission line ("DFRTL") preferably for linear accelerators, having two plane conductors each with a central hole, and an electromagnetically permeable material ("EPM") between the two conductors and surrounding a channel connecting the two holes. At least one of the material parameters of relative magnetic permeability, relative dielectric permittivity, and axial width of the EPM is varied as a function of radius, so that the characteristic impedance of the DFRTL is held substantially constant, and pulse transmission therethrough is substantially dispersion-free. Preferably, the EPM is divided into concentric radial sections, with the varied material parameters held constant in each respective section but stepwise varied between sections as a step function of the radius. The radial widths of the concentric sections are selected so that pulse traversal time across each section is the same, and the varied material parameters of the concentric sections are selected to minimize traversal error.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Number(s):
7,924,121
Application Number:
US Patent Application 12/144,274
OSTI ID:
1016725
Country of Publication:
United States
Language:
English

References (5)

Electromagnetic simulation of linear proton acceletrator structures using dielectric wall acceletrators conference June 2007
Induction voltage adders and the induction accelerator family journal June 2004
Controlled resolution reconstruction of one-dimensional permittivity profiles null January 2003
Linear induction accelerators made from pulse‐line cavities with external pulse injection journal June 1979
Investigation of a radial transmission line transformer for high‐gradient particle accelerators journal January 1988

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