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
Year: 2025
Type: article
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.
Source: Review of Scientific Instruments
DOI: 10.1063/5.0243894
Authors: 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
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: ER55092; TITLE: ELECTRON TEMPERATURE FLUCTUATION MEASUREMENTS AND TRANSPORT MODEL VALIDATION AT ALCATOR C-MOD; PI: ANNE WHITE, MIT PLASMA SCIENCE AND FUSION CENTER MAGNETIC CONFINEMENT FUSION EXPERIMENT RESEARCH AND RELATED ACTIVITIES, G2293481551, G3531872738, G4109425323, ELECTRON TEMPERATURE FLUCTUATION AND N-T PHASE ANGLE MEASUREMENTS FOR VALIDATION OF GYROKINETIC TRANSPORT MODELS AT ASDEX UPGRADE
OpenAlex ID: W4408152969