{"dcterms:modified":"2025-04-01","dcterms:creator":"Harvard Dataverse","@type":"ore:ResourceMap","schema:additionalType":"Dataverse OREMap Format v1.0.1","dvcore:generatedBy":{"@type":"schema:SoftwareApplication","schema:name":"Dataverse","schema:version":"6.6 build 1829-192cdc4","schema:url":"https://github.com/iqss/dataverse"},"@id":"https://dataverse.harvard.edu/api/datasets/export?exporter=OAI_ORE&persistentId=https://doi.org/10.7910/DVN/PZOMOI","ore:describes":{"citation:dsDescription":{"citation:dsDescriptionValue":"Efficient lower hybrid current drive (LHCD) is demonstrated at densities up to ne≈1.5×10^20 m^-3 in diverted plasmas on the Alcator C-Mod tokamak by operating at increased plasma current - and therefore reduced Greenwald density fraction. This density exceeds the nominal \"LH density limit\" at ne≈1.0×10^20 m^-3 reported previously, above which an anomalous loss of current drive efficiency was observed. The recovery of current drive efficiency to a level consistent with engineering scalings is correlated with a reduction in density shoulders and turbulence levels in the far scrape-off layer. Concurrently, rf wave interaction with the edge and/or scrape-off-layer plasma is reduced, as indicated by a minimal broadening of the wave frequency spectrum measured at the plasma edge. These results have important implications for sustaining steady-state tokamak operation and indicate a pathway forward for implementing efficient LHCD in a reactor."},"citation:keyword":[{"citation:keywordValue":"lower hybrid heating & current drive"},{"citation:keywordValue":"parametric decay instability"},{"citation:keywordValue":"scattering of waves by turbulence"},{"citation:keywordValue":"scrape off layer"},{"citation:keywordValue":"tokamak plasma"}],"citation:datasetContact":{"citation:datasetContactEmail":"sgbaek@psfc.mit.edu"},"author":{"citation:authorName":"S. G. Baek, G. M. Wallace, P. T. Bonoli, D. Brunner, I. C. Faust, A. E. Hubbard, J. W. Hughes, B. LaBombard, R. R. Parker, M. Porkolab, S. Shiraiwa, S. Wukitch"},"title":"Observation of Efficient Lower Hybrid Current Drive at High Density in Diverted Plasmas on the Alcator C-Mod Tokamak","citation:notesText":"<a href=\"http://library.psfc.mit.edu/catalog/reports/2010/18ja/18ja022/abstract.php\">PSFC REPORT PSFC/JA-18-22</a><br /><br />This research was conducted on Alcator C-Mod, a DOE Office of Science User Facility, and is supported by DOE Contract No. DE-FC02-99ER54512","subject":"Physics","@id":"https://doi.org/10.7910/DVN/PZOMOI","@type":["ore:Aggregation","schema:Dataset"],"schema:version":"1.0","schema:name":"Observation of Efficient Lower Hybrid Current Drive at High Density in Diverted Plasmas on the Alcator C-Mod Tokamak","schema:dateModified":"Fri Jan 18 14:42:22 UTC 2019","schema:datePublished":"2019-01-18","schema:creativeWorkStatus":"RELEASED","dvcore:termsOfUse":"This dataset is made available without information on how it can be used. You should communicate with the Contact(s) specified before use.","dvcore:fileTermsOfAccess":{"dvcore:fileRequestAccess":false},"schema:includedInDataCatalog":"Harvard Dataverse","schema:isPartOf":{"schema:name":"Plasma Science and Fusion Center Dataverse","@id":"https://dataverse.harvard.edu/dataverse/MIT-PSFC","schema:description":"This archive contains all pre-print manuscript versions prior to actual publication in peer-reviewed journals, with associated data sets.   This collection also includes contributions to conferences.  ","schema:isPartOf":{"schema:name":"Harvard Dataverse","@id":"https://dataverse.harvard.edu/dataverse/harvard","schema:description":"<span><span><span><h3>Share, archive, and get credit for your data. Find and cite data across all research fields.</h3></span></span></span>"}},"ore:aggregates":[{"schema:description":"","schema:name":"18ja022_archival_manuscript.pdf","dvcore:restricted":false,"schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/KQHCWB","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/KQHCWB","@type":"ore:AggregatedResource","schema:fileFormat":"application/pdf","dvcore:filesize":1623514,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be40f-3c630c46288f","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"119d454fb6f8b718aa3f61974b690a14"}},{"schema:description":"","schema:name":"18ja022_fig1_data.hdf5","dvcore:restricted":false,"dvcore:directoryLabel":"var/www/html/reports/18JA/18JA22","schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/BBH1RP","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/BBH1RP","@type":"ore:AggregatedResource","schema:fileFormat":"application/x-hdf5","dvcore:filesize":480912,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be41b-4187023c704d","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"897010645d6e3782f49581ea28aa19b9"}},{"schema:description":"","schema:name":"18ja022_fig2_data.hdf5","dvcore:restricted":false,"dvcore:directoryLabel":"var/www/html/reports/18JA/18JA22","schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/DNB7OQ","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/DNB7OQ","@type":"ore:AggregatedResource","schema:fileFormat":"application/x-hdf5","dvcore:filesize":1340456,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be423-62bf686d6e43","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"503ea7de6195079d3b0066e6a811e881"}},{"schema:description":"","schema:name":"18ja022_fig3_data.hdf5","dvcore:restricted":false,"dvcore:directoryLabel":"var/www/html/reports/18JA/18JA22","schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/Z0FM3L","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/Z0FM3L","@type":"ore:AggregatedResource","schema:fileFormat":"application/x-hdf5","dvcore:filesize":26640,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be42d-8d918abdb229","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"d3c01c1ab91149a259207fe879a7eb03"}},{"schema:description":"","schema:name":"18ja022_fig4a_data.hdf5","dvcore:restricted":false,"dvcore:directoryLabel":"var/www/html/reports/18JA/18JA22","schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/8WLKUB","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/8WLKUB","@type":"ore:AggregatedResource","schema:fileFormat":"application/x-hdf5","dvcore:filesize":31056,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be432-25cd0654f8a7","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"cdc56b06dd8b270bc1a04614d56dc7e5"}},{"schema:description":"","schema:name":"18ja022_fig4b_data.hdf5","dvcore:restricted":false,"dvcore:directoryLabel":"var/www/html/reports/18JA/18JA22","schema:version":1,"dvcore:datasetVersionId":149607,"@id":"doi:10.7910/DVN/PZOMOI/FMZ7CN","schema:sameAs":"https://dataverse.harvard.edu/api/access/datafile/:persistentId?persistentId=doi:10.7910/DVN/PZOMOI/FMZ7CN","@type":"ore:AggregatedResource","schema:fileFormat":"application/x-hdf5","dvcore:filesize":31056,"dvcore:storageIdentifier":"s3://dvn-cloud:168627be437-16f4e56c3585","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"d86523c8ee028136bcb2a039b0e56a32"}}],"schema:hasPart":["doi:10.7910/DVN/PZOMOI/KQHCWB","doi:10.7910/DVN/PZOMOI/BBH1RP","doi:10.7910/DVN/PZOMOI/DNB7OQ","doi:10.7910/DVN/PZOMOI/Z0FM3L","doi:10.7910/DVN/PZOMOI/8WLKUB","doi:10.7910/DVN/PZOMOI/FMZ7CN"]},"@context":{"author":"http://purl.org/dc/terms/creator","citation":"https://dataverse.org/schema/citation/","dcterms":"http://purl.org/dc/terms/","dvcore":"https://dataverse.org/schema/core#","ore":"http://www.openarchives.org/ore/terms/","schema":"http://schema.org/","subject":"http://purl.org/dc/terms/subject","title":"http://purl.org/dc/terms/title"}}