Microwave Analysis with Monte Carlo Methods for ECH Transmission Lines

M. C. Kaufman; C. Lau; G. R. Hanson

doi:10.1007/s10762-018-0475-5

Microwave Analysis with Monte Carlo Methods for ECH Transmission Lines

M. C. Kaufman, C. Lau, G. R. Hanson

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A new code framework, MORAMC, is presented which model transmission line (TL) systems consisting of overmoded circular waveguide and other components including miter bends and transmission line gaps. The transmission line is modeled as a set of mode converters in series where each component is composed of one or more converters. The parametrization of each mode converter can account for the fabrication tolerances of physically realizable components. These tolerances as well as the precision to which these TL systems can be installed and aligned gives a practical limit to which the uncertainty of the microwave performance of the system can be calculated. Because of this, Monte Carlo methods are a natural fit and are employed to calculate the probability distribution that a given TL can deliver a required power and mode purity. Several examples are given to demonstrate the usefulness of MORAMC in optimizing TL systems.

Original language	English
Pages (from-to)	456-482
Number of pages	27
Journal	Journal of Infrared, Millimeter, and Terahertz Waves
Volume	39
Issue number	5
DOIs	https://doi.org/10.1007/s10762-018-0475-5
State	Published - May 1 2018

Funding

This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/ downloads/doe-public-access-plan). Acknowledgements The authors would like to thank Guiding Wang (UCLA) for providing experimental data for the transmission line losses of the ITER LFSR test stand and also Tim Bigelow (ORNL) for valuable discussion. This work was performed under the U.S. DOE contract no. DE-AC05-00OR22725.

Keywords

Electron cyclotron heating
ITER
Monte Carlo
Transmission lines

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10762-018-0475-5

Cite this

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title = "Microwave Analysis with Monte Carlo Methods for ECH Transmission Lines",

abstract = "A new code framework, MORAMC, is presented which model transmission line (TL) systems consisting of overmoded circular waveguide and other components including miter bends and transmission line gaps. The transmission line is modeled as a set of mode converters in series where each component is composed of one or more converters. The parametrization of each mode converter can account for the fabrication tolerances of physically realizable components. These tolerances as well as the precision to which these TL systems can be installed and aligned gives a practical limit to which the uncertainty of the microwave performance of the system can be calculated. Because of this, Monte Carlo methods are a natural fit and are employed to calculate the probability distribution that a given TL can deliver a required power and mode purity. Several examples are given to demonstrate the usefulness of MORAMC in optimizing TL systems.",

keywords = "Electron cyclotron heating, ITER, Monte Carlo, Transmission lines",

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N2 - A new code framework, MORAMC, is presented which model transmission line (TL) systems consisting of overmoded circular waveguide and other components including miter bends and transmission line gaps. The transmission line is modeled as a set of mode converters in series where each component is composed of one or more converters. The parametrization of each mode converter can account for the fabrication tolerances of physically realizable components. These tolerances as well as the precision to which these TL systems can be installed and aligned gives a practical limit to which the uncertainty of the microwave performance of the system can be calculated. Because of this, Monte Carlo methods are a natural fit and are employed to calculate the probability distribution that a given TL can deliver a required power and mode purity. Several examples are given to demonstrate the usefulness of MORAMC in optimizing TL systems.

AB - A new code framework, MORAMC, is presented which model transmission line (TL) systems consisting of overmoded circular waveguide and other components including miter bends and transmission line gaps. The transmission line is modeled as a set of mode converters in series where each component is composed of one or more converters. The parametrization of each mode converter can account for the fabrication tolerances of physically realizable components. These tolerances as well as the precision to which these TL systems can be installed and aligned gives a practical limit to which the uncertainty of the microwave performance of the system can be calculated. Because of this, Monte Carlo methods are a natural fit and are employed to calculate the probability distribution that a given TL can deliver a required power and mode purity. Several examples are given to demonstrate the usefulness of MORAMC in optimizing TL systems.

KW - Electron cyclotron heating

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Microwave Analysis with Monte Carlo Methods for ECH Transmission Lines

Abstract

Funding

Keywords

UN SDGs

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