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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 \u223c90\u00b0 to 120\u00b0, suggesting changes in the properties of the turbulence driving transport in the plasma edge.<\/jats:p>","DOI":"10.1063\/5.0243894","type":"journal-article","created":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T13:41:42Z","timestamp":1741095702000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":3,"title":["Design of a correlation reflectometer radiometer diagnostic and measurements of the electron density\u2013temperature cross-phase angle in the H-mode pedestal with small edge localized modes at ASDEX Upgrade"],"prefix":"10.1063","volume":"96","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1241-3078","authenticated-orcid":false,"given":"C.","family":"Yoo","sequence":"first","affiliation":[{"name":"Plasma Science and Fusion Center, Massachusetts Institute of Technology 1 , Cambridge, Massachusetts 02139,","place":["USA"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3947-4268","authenticated-orcid":false,"given":"G. 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