{"@context":{"@language":"en","@vocab":"https://schema.org/","citeAs":"cr:citeAs","column":"cr:column","conformsTo":"dct:conformsTo","cr":"http://mlcommons.org/croissant/","rai":"http://mlcommons.org/croissant/RAI/","data":{"@id":"cr:data","@type":"@json"},"dataType":{"@id":"cr:dataType","@type":"@vocab"},"dct":"http://purl.org/dc/terms/","examples":{"@id":"cr:examples","@type":"@json"},"extract":"cr:extract","field":"cr:field","fileProperty":"cr:fileProperty","fileObject":"cr:fileObject","fileSet":"cr:fileSet","format":"cr:format","includes":"cr:includes","isLiveDataset":"cr:isLiveDataset","jsonPath":"cr:jsonPath","key":"cr:key","md5":"cr:md5","parentField":"cr:parentField","path":"cr:path","recordSet":"cr:recordSet","references":"cr:references","regex":"cr:regex","repeated":"cr:repeated","replace":"cr:replace","sc":"https://schema.org/","separator":"cr:separator","source":"cr:source","subField":"cr:subField","transform":"cr:transform","wd":"https://www.wikidata.org/wiki/"},"@type":"sc:Dataset","conformsTo":"http://mlcommons.org/croissant/1.0","name":"The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode","url":"https://doi.org/10.7910/DVN/UZUY8B","creator":[{"@type":"Organization","name":"W. McCarthy, A. E. Hubbard, J. Terry, B. Labombard, A. Kuang, R. Bielajew, I. Hutchinson, J. W. Hughes, D. Silvagni, T. Happel, L. Gil, The Alcator C-Mod Team, The Asdex Upgrade Team"}],"description":"The Low Frequency Edge Oscillation (LFEO) is a low frequency fluctuation in many plasma quantities in the pedestal region of the I-Mode confinement regime. It is observed on Alcator C-Mod between 10-30kHz and on ASDEX Upgrade between 5-10kHz. On both tokamaks it has been previously identified as a Geodesic Acoustic Mode (GAM), however the recent discovery of the Edge Temperature Ring Oscillation (ETRO) in a similar frequency and spatial location as the LFEO in I-Modes on EAST has called this identification into question. In this paper we investigate the LFEO on C-Mod and AUG using a variety of different experimental techniques including spectral analysis, magnetic mode number analysis, localization, and direct measurement of the LFEO zonal structure and propagation using a Mirror Langmuir Probe. This investigation has reconfirmed the identification of the LFEO as a GAM and determined that it has several key differences from the ETRO.","keywords":["Physics","AUG","C-Mod","geodesic acoustic mode","I-mode","Mirror Langmuir Probe","tokamak"],"license":"http://creativecommons.org/publicdomain/zero/1.0","datePublished":"2025-03-05","dateModified":"2025-03-05","includedInDataCatalog":{"@type":"DataCatalog","name":"Harvard Dataverse","url":"https://dataverse.harvard.edu"},"publisher":{"@type":"Organization","name":"Harvard Dataverse"},"version":"1.0","citeAs":"@data{DVN/UZUY8B_2025,author = {W. McCarthy, A. E. Hubbard, J. Terry, B. Labombard, A. Kuang, R. Bielajew, I. Hutchinson, J. W. Hughes, D. Silvagni, T. Happel, L. Gil, The Alcator C-Mod Team, The Asdex Upgrade Team},publisher = {Harvard Dataverse},title = {The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode},year = {2025},url = 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