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Title: Dispersion-free radial transmission lines

Abstract

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.

Inventors:
 [1];  [2]
  1. Livermore, CA
  2. Patterson, CA
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1016725
Patent Number(s):
7,924,121
Application Number:
US Patent Application 12/144,274
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Caporaso, George J, and Nelson, Scott D. Dispersion-free radial transmission lines. United States: N. p., 2011. Web.
Caporaso, George J, & Nelson, Scott D. Dispersion-free radial transmission lines. United States.
Caporaso, George J, and Nelson, Scott D. 2011. "Dispersion-free radial transmission lines". United States. https://www.osti.gov/servlets/purl/1016725.
@article{osti_1016725,
title = {Dispersion-free radial transmission lines},
author = {Caporaso, George J and Nelson, Scott D},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/1016725}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 12 00:00:00 EDT 2011},
month = {Tue Apr 12 00:00:00 EDT 2011}
}

Works referenced in this record:

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


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