Optimization studies of the ITER low field side reflectometer

S. J. Diem; J. B. Wilgen; T. S. Bigelow; G. R. Hanson; R. W. Harvey; A. P. Smirnov

doi:10.1063/1.3490026

Optimization studies of the ITER low field side reflectometer

S. J. Diem, J. B. Wilgen, T. S. Bigelow, G. R. Hanson, R. W. Harvey, A. P. Smirnov

Fusion Technology

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

3 Scopus citations

Abstract

Microwave reflectometry will be used on ITER to measure the electron density profile, density fluctuations due to MHD/turbulence, edge localized mode (ELM) density transients, and as an L-H transition monitor. The ITER low field side reflectometer system will measure both core and edge quantities using multiple antenna arrays spanning frequency ranges of 15-155 GHz for the O-mode system and 55-220 GHz for the X-mode system. Optimization studies using the GENRAY ray-tracing code have been done for edge and core measurements. The reflectometer launchers will utilize the HE11 mode launched from circular corrugated waveguide. The launched beams are assumed to be Gaussian with a beam waist diameter of 0.643 times the waveguide diameter. Optimum launcher size and placement are investigated by computing the antenna coupling between launchers, assuming the launched and received beams have a Gaussian beam pattern.

Original language	English
Article number	10D914
Journal	Review of Scientific Instruments
Volume	81
Issue number	10
DOIs	https://doi.org/10.1063/1.3490026
State	Published - Oct 2010

Funding

This research was supported by U.S. DOE under Grant No. DE-AC05-00OR22725.

UN SDGs

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

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10.1063/1.3490026

Cite this

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abstract = "Microwave reflectometry will be used on ITER to measure the electron density profile, density fluctuations due to MHD/turbulence, edge localized mode (ELM) density transients, and as an L-H transition monitor. The ITER low field side reflectometer system will measure both core and edge quantities using multiple antenna arrays spanning frequency ranges of 15-155 GHz for the O-mode system and 55-220 GHz for the X-mode system. Optimization studies using the GENRAY ray-tracing code have been done for edge and core measurements. The reflectometer launchers will utilize the HE11 mode launched from circular corrugated waveguide. The launched beams are assumed to be Gaussian with a beam waist diameter of 0.643 times the waveguide diameter. Optimum launcher size and placement are investigated by computing the antenna coupling between launchers, assuming the launched and received beams have a Gaussian beam pattern.",

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AU - Diem, S. J.

AU - Wilgen, J. B.

AU - Bigelow, T. S.

AU - Hanson, G. R.

AU - Harvey, R. W.

AU - Smirnov, A. P.

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AB - Microwave reflectometry will be used on ITER to measure the electron density profile, density fluctuations due to MHD/turbulence, edge localized mode (ELM) density transients, and as an L-H transition monitor. The ITER low field side reflectometer system will measure both core and edge quantities using multiple antenna arrays spanning frequency ranges of 15-155 GHz for the O-mode system and 55-220 GHz for the X-mode system. Optimization studies using the GENRAY ray-tracing code have been done for edge and core measurements. The reflectometer launchers will utilize the HE11 mode launched from circular corrugated waveguide. The launched beams are assumed to be Gaussian with a beam waist diameter of 0.643 times the waveguide diameter. Optimum launcher size and placement are investigated by computing the antenna coupling between launchers, assuming the launched and received beams have a Gaussian beam pattern.

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Optimization studies of the ITER low field side reflectometer

Abstract

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