Analysis of cooling for the ITER ECH waveguide transmission line

Ethan Coffey; Tim Bigelow; Ira Griffith; Greg Hanson; Arnold Lumsdaine; Claire Luttrell; David Rasmussen; Chuck Schaich; Bill Wolframe

doi:10.13182/FST14-962

Analysis of cooling for the ITER ECH waveguide transmission line

Ethan Coffey, Tim Bigelow, Ira Griffith, Greg Hanson, Arnold Lumsdaine, Claire Luttrell, David Rasmussen, Chuck Schaich, Bill Wolframe

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

4 Scopus citations

Abstract

Finite element analysis calculations are performed to determine the temperature profile in sections of the ITER Electron Cyclotron Heating (ECH) transmission line waveguide. Each aluminum, corrugated waveguide transmission line will transmit up to 1.5 MW of electromagnetic radiation over roughly 200 meters from a 170 GHz gyrotron to heat the plasma in the tokamak. The "ridged tube" waveguide has integral water cooling traces which are lined with copper tubing. Each transmission line includes miter bends which may be actively cooled and waveguide couplings, where the waveguide cannot be actively cooled due to coupling hardware. The amount of cooling water available is limited, so determining the required amount of water in the cooling lines is essential. Finite element computational analyses are performed to determine the effect of the heat load and water cooling on the temperature profile of the waveguide in various steady-state cases.

Original language	English
Title of host publication	Fusion Science and Technology
Publisher	American Nuclear Society
Pages	383-387
Number of pages	5
Volume	68
Edition	2
ISBN (Electronic)	9781510811836
DOIs	https://doi.org/10.13182/FST14-962
State	Published - Sep 1 2015

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AU - Coffey, Ethan

AU - Bigelow, Tim

AU - Griffith, Ira

AU - Hanson, Greg

AU - Lumsdaine, Arnold

AU - Luttrell, Claire

AU - Rasmussen, David

AU - Schaich, Chuck

AU - Wolframe, Bill

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AB - Finite element analysis calculations are performed to determine the temperature profile in sections of the ITER Electron Cyclotron Heating (ECH) transmission line waveguide. Each aluminum, corrugated waveguide transmission line will transmit up to 1.5 MW of electromagnetic radiation over roughly 200 meters from a 170 GHz gyrotron to heat the plasma in the tokamak. The "ridged tube" waveguide has integral water cooling traces which are lined with copper tubing. Each transmission line includes miter bends which may be actively cooled and waveguide couplings, where the waveguide cannot be actively cooled due to coupling hardware. The amount of cooling water available is limited, so determining the required amount of water in the cooling lines is essential. Finite element computational analyses are performed to determine the effect of the heat load and water cooling on the temperature profile of the waveguide in various steady-state cases.

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Analysis of cooling for the ITER ECH waveguide transmission line

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