{"id":3859237,"identifier":"DVN/NMVUFS","persistentUrl":"https://doi.org/10.7910/DVN/NMVUFS","protocol":"doi","authority":"10.7910","separator":"/","publisher":"Harvard Dataverse","publicationDate":"2020-06-03","storageIdentifier":"file://10.7910/DVN/NMVUFS","datasetType":"dataset","datasetVersion":{"id":196691,"datasetId":3859237,"datasetPersistentId":"doi:10.7910/DVN/NMVUFS","storageIdentifier":"file://10.7910/DVN/NMVUFS","versionNumber":1,"versionMinorNumber":0,"versionState":"RELEASED","latestVersionPublishingState":"DRAFT","deaccessionLink":"","lastUpdateTime":"2020-06-03T18:14:05Z","releaseTime":"2020-06-03T18:14:05Z","createTime":"2020-06-03T18:12:46Z","publicationDate":"2020-06-03","citationDate":"2020-06-03","termsOfUse":"This dataset is made available without information on how it can be used. You should communicate with the Contact(s) specified before use.","fileAccessRequest":false,"metadataBlocks":{"citation":{"displayName":"Citation Metadata","name":"citation","fields":[{"typeName":"title","multiple":false,"typeClass":"primitive","value":"Performance assessment of long-legged tightly-baffled divertor geometries in the ARC reactor concept"},{"typeName":"author","multiple":true,"typeClass":"compound","value":[{"authorName":{"typeName":"authorName","multiple":false,"typeClass":"primitive","value":"Michael Robert Knox Wigram, Brian LaBombard, Maxim V. Umansky, Adam Q Kuang, Theodore Golfinopoulos, Jim L. Terry, Daniel Brunner, Marvin E. Rensink, Christopher P. Ridgers, Dennis G. Whyte"}}]},{"typeName":"datasetContact","multiple":true,"typeClass":"compound","value":[{"datasetContactEmail":{"typeName":"datasetContactEmail","multiple":false,"typeClass":"primitive","value":"wigram@psfc.mit.edu"}}]},{"typeName":"dsDescription","multiple":true,"typeClass":"compound","value":[{"dsDescriptionValue":{"typeName":"dsDescriptionValue","multiple":false,"typeClass":"primitive","value":"Extremely intense power exhaust channels are projected for tokamak-based fusion power reactors; a means to handle them remains to be demonstrated. Advanced divertor configurations have been proposed as potential solutions. Recent modelling of tightly baffled, long-legged divertor geometries for the divertor test tokamak concept, ADX, has shown that these concepts may access passively stable, fully detached regimes over a broad range of parameters. The question remains as to how such divertors may perform in a reactor setting. To explore this, numerical simulations are performed with UEDGE for the long-legged divertor geometry proposed for the ARC pilot plant conceptual design - a device with projected heat flux power width (λq||) of 0.4 mm and power exhaust of 93 MW - first for a simplified Super-X divertor configuration (SXD) and then for the actual X-point target divertor (XPTD) being proposed. It is found that the SXD, combined with 0.5% fixed-fraction neon impurity concentration, can produce passively stable, detached divertor regimes for power exhausts in the range of 80-108 MW - fully accommodating ARC's power exhaust. The XPTD configuration is found to reduce the strike-point temperature by a factor of ~10 compared to the SXD for small separations (~1.4λq||) between main and divertor X-point magnetic flux surfaces. Even greater potential reductions are identified for reducing separations to ~1λq|| or less. The power handling response is found to be insensitive to the level of cross-field convective or diffusive transport assumed in the divertor leg. By raising the separatrix density by a factor of 1.5, stable fully detached divertor solutions are obtained that fully accommodate the ARC exhaust power without impurity seeding. To our knowledge, this is the first time an impurity-free divertor power handling scenario has been obtained in edge modelling for a tokamak fusion power reactor with λq|| of 0.4 mm."}}]},{"typeName":"subject","multiple":true,"typeClass":"controlledVocabulary","value":["Physics"]},{"typeName":"keyword","multiple":true,"typeClass":"compound","value":[{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"ARC"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"detached"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"divertor"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"modelling"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"power handling"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"UEDGE"}}]},{"typeName":"notesText","multiple":false,"typeClass":"primitive","value":"<a href=\"http://library.psfc.mit.edu/catalog/reports/2010/19ja/19ja020/abstract.php\">PSFC REPORT PSFC/JA-19-20</a><br /><br />This work has been supported by the University of York, Massachusetts Institute of Technology (supported by US DoE cooperative agreement DE-SC0014264), Lawrence Livermore National Laboratory (supported under DoE Contract DE-AC52-07NA27344) and the UK Engineering and Physical Science Research Council (EPSRC) as part of the EPSRC Fusion Centre for Doctoral Training programme (under Training Grant Number EP/LO1663X/1)."}]}},"files":[{"description":"","label":"19ja020_archival_manuscript.pdf","restricted":false,"version":1,"datasetVersionId":196691,"dataFile":{"id":3859238,"persistentId":"doi:10.7910/DVN/NMVUFS/MF8VBM","pidURL":"https://doi.org/10.7910/DVN/NMVUFS/MF8VBM","filename":"19ja020_archival_manuscript.pdf","contentType":"application/pdf","friendlyType":"Adobe PDF","filesize":6289757,"description":"","storageIdentifier":"s3://dvn-cloud:1727c3e9b4f-a0c0fdbf7689","rootDataFileId":-1,"md5":"892c2e9895e64ddad8bdab671d230cab","checksum":{"type":"MD5","value":"892c2e9895e64ddad8bdab671d230cab"},"tabularData":false,"creationDate":"2020-06-03","publicationDate":"2020-06-03","fileAccessRequest":false}}],"citation":"Michael Robert Knox Wigram, Brian LaBombard, Maxim V. Umansky, Adam Q Kuang, Theodore Golfinopoulos, Jim L. Terry, Daniel Brunner, Marvin E. Rensink, Christopher P. Ridgers, Dennis G. Whyte, 2020, \"Performance assessment of long-legged tightly-baffled divertor geometries in the ARC reactor concept\", https://doi.org/10.7910/DVN/NMVUFS, Harvard Dataverse, V1"}}