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
Name
033504_1_5.0243894.pdf
Description
Published version
Size
7.84 MB
Format
Adobe PDF
Checksum (MD5)
9ce5db059a784fea2c9d35add7952124
Author(s)
Yoo, C
Conway, GD
Burke, W
Cabrera, PA Molina
Vanovac, B
Bielajew, R
Cruz-Zabala, DJ
Silva, A
White, AE
Date Issued
March 4, 2025
Journal
Review of Scientific Instruments
Publisher
AIP Publishing
Citation
C. Yoo, G. D. Conway, W. Burke, P. A. Molina Cabrera, B. Vanovac, R. Bielajew, D. J. Cruz-Zabala, A. Silva, A. E. White, ASDEX Upgrade Team; 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. Rev. Sci. Instrum. 1 March 2025; 96 (3): 033504.
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1063/5.0243894
