Design and analysis of 140-degree miter bend for high power electron cyclotron heating transmission lines

Joseph B. Tipton; Arnold Lumsdaine; Charles Schaich; Gregory R. Hanson

doi:10.1080/15361055.2017.1350486

Design and analysis of 140-degree miter bend for high power electron cyclotron heating transmission lines

Joseph B. Tipton, Arnold Lumsdaine, Charles Schaich, Gregory R. Hanson

Fusion Engineering

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

1 Scopus citations

Abstract

The ITER Electron Cyclotron Heating (ECH) system Transmission Lines (TL) require highly polished copper mirrors on miter bends (both 90° and 140°) to direct microwaves from their origin to the tokamak. This will result in substantial heat dissipation on the miter bends and mirrors and will require water cooling in order to achieve long pulse operation. Analysis and optimization of the cooling design for the 140° miter bend assembly used ANSYS^® Multiphysics^™ software to develop and verify the fluid, thermal, and structural behavior of the mirror and miter bend assembly. Simulation model choices included a thermo-mechanical model of the mirror-only, a thermo-mechanical model of the miter bend assembly, and a thermo-mechanical model of the mirror with coolant. These analyses revealed an optimal solution that uses a major-axis cooling channel configuration for the 140° miter bend to meet the design criteria (e.g. structural stresses, mirror deflection, vacuum seal, coolant temperatures and pressures).

Original language	English
Pages (from-to)	616-622
Number of pages	7
Journal	Fusion Science and Technology
Volume	72
Issue number	4
DOIs	https://doi.org/10.1080/15361055.2017.1350486
State	Published - Nov 2017

Funding

This work is supported in part by US DOE Contract Number DE-AC05-00OR22725.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725

Keywords

Electron cyclotron heating transmission line
Miter bend
Thermo-mechanical analysis

UN SDGs

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

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10.1080/15361055.2017.1350486

Cite this

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title = "Design and analysis of 140-degree miter bend for high power electron cyclotron heating transmission lines",

abstract = "The ITER Electron Cyclotron Heating (ECH) system Transmission Lines (TL) require highly polished copper mirrors on miter bends (both 90° and 140°) to direct microwaves from their origin to the tokamak. This will result in substantial heat dissipation on the miter bends and mirrors and will require water cooling in order to achieve long pulse operation. Analysis and optimization of the cooling design for the 140° miter bend assembly used ANSYS{\textregistered} Multiphysics{\texttrademark} software to develop and verify the fluid, thermal, and structural behavior of the mirror and miter bend assembly. Simulation model choices included a thermo-mechanical model of the mirror-only, a thermo-mechanical model of the miter bend assembly, and a thermo-mechanical model of the mirror with coolant. These analyses revealed an optimal solution that uses a major-axis cooling channel configuration for the 140° miter bend to meet the design criteria (e.g. structural stresses, mirror deflection, vacuum seal, coolant temperatures and pressures).",

keywords = "Electron cyclotron heating transmission line, Miter bend, Thermo-mechanical analysis",

author = "Tipton, {Joseph B.} and Arnold Lumsdaine and Charles Schaich and Hanson, {Gregory R.}",

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doi = "10.1080/15361055.2017.1350486",

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T1 - Design and analysis of 140-degree miter bend for high power electron cyclotron heating transmission lines

AU - Tipton, Joseph B.

AU - Lumsdaine, Arnold

AU - Schaich, Charles

AU - Hanson, Gregory R.

PY - 2017/11

Y1 - 2017/11

N2 - The ITER Electron Cyclotron Heating (ECH) system Transmission Lines (TL) require highly polished copper mirrors on miter bends (both 90° and 140°) to direct microwaves from their origin to the tokamak. This will result in substantial heat dissipation on the miter bends and mirrors and will require water cooling in order to achieve long pulse operation. Analysis and optimization of the cooling design for the 140° miter bend assembly used ANSYS® Multiphysics™ software to develop and verify the fluid, thermal, and structural behavior of the mirror and miter bend assembly. Simulation model choices included a thermo-mechanical model of the mirror-only, a thermo-mechanical model of the miter bend assembly, and a thermo-mechanical model of the mirror with coolant. These analyses revealed an optimal solution that uses a major-axis cooling channel configuration for the 140° miter bend to meet the design criteria (e.g. structural stresses, mirror deflection, vacuum seal, coolant temperatures and pressures).

AB - The ITER Electron Cyclotron Heating (ECH) system Transmission Lines (TL) require highly polished copper mirrors on miter bends (both 90° and 140°) to direct microwaves from their origin to the tokamak. This will result in substantial heat dissipation on the miter bends and mirrors and will require water cooling in order to achieve long pulse operation. Analysis and optimization of the cooling design for the 140° miter bend assembly used ANSYS® Multiphysics™ software to develop and verify the fluid, thermal, and structural behavior of the mirror and miter bend assembly. Simulation model choices included a thermo-mechanical model of the mirror-only, a thermo-mechanical model of the miter bend assembly, and a thermo-mechanical model of the mirror with coolant. These analyses revealed an optimal solution that uses a major-axis cooling channel configuration for the 140° miter bend to meet the design criteria (e.g. structural stresses, mirror deflection, vacuum seal, coolant temperatures and pressures).

KW - Electron cyclotron heating transmission line

KW - Miter bend

KW - Thermo-mechanical analysis

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Design and analysis of 140-degree miter bend for high power electron cyclotron heating transmission lines

Abstract

Funding

Keywords

UN SDGs

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