{"@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":"Kinetic-ballooning-limited pedestals in spherical tokamak plasmas","url":"https://doi.org/10.7910/DVN/EMCEVC","creator":[{"@type":"Person","name":"Parisi, J.F.; Guttenfelder, W.; Nelson, A.O.; Gaur, R.; Kleiner, A.; Lampert, M.; Avdeeva, G.; Berkery, J.W.; Clauser, C.; Curie, M.; Diallo, A.; Dorland, W.; Kaye, S.M.; Mcclenaghan, J.; Parra, F.I."}],"description":"A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high-β tokamak NSTX. Combining linear gyrokinetics with self-consistent pedestal equilibrium variation, kinetic-ballooning, rather than ideal-ballooning plasma instability, is shown to limit achievable confinement in spherical tokamak pedestals. Simulations are used to find the novel Gyrokinetic Critical Pedestal constraint, which determines the steepest pressure profile a pedestal can sustain subject to gyrokinetic instability. Gyrokinetic width-height scaling expressions for NSTX pedestals with varying density and temperature profiles are obtained. These scalings for STs depart significantly from that of conventional aspect ratio tokamaks.","keywords":["Physics","conventional aspect ratio tokamaks","gyrokinetic instability","ideal-ballooning plasma instability","kinetic-ballooning-limited pedestals","linear gyrokinetics","low-aspect-ratio high- β tokamak NSTX","novel Gyrokinetic Critical Pedestal constraint","NSTX pedestals","pedestal width-height Diallo scaling","self-consistent pedestal equilibrium variation","spherical tokamak pedestals","spherical tokamak plasmas","width-height scaling expressions"],"license":"http://creativecommons.org/publicdomain/zero/1.0","datePublished":"2025-06-09","dateModified":"2025-06-09","includedInDataCatalog":{"@type":"DataCatalog","name":"Harvard Dataverse","url":"https://dataverse.harvard.edu"},"publisher":{"@type":"Organization","name":"Harvard Dataverse"},"version":"1.0","citeAs":"@data{DVN/EMCEVC_2025,author = {Parisi, J.F.; Guttenfelder, W.; Nelson, A.O.; Gaur, R.; Kleiner, A.; Lampert, M.; Avdeeva, G.; Berkery, J.W.; Clauser, C.; Curie, M.; Diallo, A.; Dorland, W.; Kaye, S.M.; Mcclenaghan, J.; Parra, F.I.},publisher = {Harvard Dataverse},title = {Kinetic-ballooning-limited pedestals in spherical tokamak plasmas},year = {2025},url = {https://doi.org/10.7910/DVN/EMCEVC}}","distribution":[{"@type":"cr:FileObject","@id":"24ja126_archival_manuscript.pdf","name":"24ja126_archival_manuscript.pdf","encodingFormat":"application/pdf","md5":"fdc532b975398c66aff1f96a2fad5c83","contentSize":"3358500","description":"","contentUrl":"https://dataverse.harvard.edu/api/access/datafile/11601826"}]}