Design of a correlation reflectometer radiometer diagnostic and measurements of the electron density–temperature cross-phase angle in the H-mode pedestal with small edge localized modes at ASDEX Upgrade

This work presents the hardware design and first results from a newly commissioned correlation reflectometer radiometer diagnostic that measures the cross-phase angle between electron density and temperature fluctuations in ASDEX Upgrade plasmas. This diagnostic employs cross correlations between signals measured by a tunable, continuous wave, perpendicular incidence, fluctuation reflectometer, and a 24-channel radiometer sharing the same line of sight. Novel measurements in the pedestal of a helium H-mode plasma with small edge localized modes show changes in the cross-phase angle between the electron density and temperature fluctuations from ∼90° to 120°, suggesting changes in the properties of the turbulence driving transport in the plasma edge.

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Publication Details

Journal
Review of Scientific Instruments
Published
2025-03-01
DOI
https://doi.org/10.1063/5.0243894
Citations
3
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
5.61

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article

Design of a correlation reflectometer radiometer diagnostic and measurements of the electron density–temperature cross-phase angle in the H-mode pedestal with small edge localized modes at ASDEX Upgrade

W. Burke, P. Molina Cabrera, C. Yoo, R. Bielajew et al.
3 citations
Review of Scientific Instruments
Magnetic confinement fusion research
5.61
article

Design of a correlation reflectometer radiometer diagnostic and measurements of the electron density–temperature cross-phase angle in the H-mode pedestal with small edge localized modes at ASDEX Upgrade

W. Burke, P. Molina Cabrera, C. Yoo, R. Bielajew, A. E. White, B. Vanovac, A. Silva, G. D. Conway, D. J. Cruz-Zabala
article en
3 citations

Abstract

This work presents the hardware design and first results from a newly commissioned correlation reflectometer radiometer diagnostic that measures the cross-phase angle between electron density and temperature fluctuations in ASDEX Upgrade plasmas. This diagnostic employs cross correlations between signals measured by a tunable, continuous wave, perpendicular incidence, fluctuation reflectometer, and a 24-channel radiometer sharing the same line of sight. Novel measurements in the pedestal of a helium H-mode plasma with small edge localized modes show changes in the cross-phase angle between the electron density and temperature fluctuations from ∼90° to 120°, suggesting changes in the properties of the turbulence driving transport in the plasma edge.

Review of Scientific InstrumentsVol. 96(3)
Plasma Technology (United States) (US), Max Planck Institute for Plasma Physics (DE), Fusion Academy (US), Massachusetts Institute of Technology (US), Universidad de Sevilla (ES)
U.S. Department of Energy, Euratom Research and Training Programme
Sustainable cities and communities
Openalex Percentile: Top 6%
Magnetic confinement fusion research
5.61
DOIOpen Access PDFOpenAlex
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Design of a correlation reflectometer radiometer diagnostic and measurements of the electron density–temperature cross-phase angle in the H-mode pedestal with small edge localized modes at ASDEX Upgrade — W. Burke, P. Molina Cabrera, et al. · Review of Scientific Instruments (2025) | TGRS Research Map | TGRS