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Part 1: Document Description
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Citation |
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Title: |
Kinetic-ballooning-limited pedestals in spherical tokamak plasmas |
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Identification Number: |
doi:10.7910/DVN/EMCEVC |
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Distributor: |
Harvard Dataverse |
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Date of Distribution: |
2025-06-09 |
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Version: |
1 |
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Bibliographic Citation: |
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., 2025, "Kinetic-ballooning-limited pedestals in spherical tokamak plasmas", https://doi.org/10.7910/DVN/EMCEVC, Harvard Dataverse, V1 |
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Citation |
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Title: |
Kinetic-ballooning-limited pedestals in spherical tokamak plasmas |
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Identification Number: |
doi:10.7910/DVN/EMCEVC |
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Authoring Entity: |
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. |
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Distributor: |
Harvard Dataverse |
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Holdings Information: |
https://doi.org/10.7910/DVN/EMCEVC |
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Study Scope |
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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 |
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Abstract: |
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. |
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Notes: |
<a href="http://library.psfc.mit.edu/catalog/reports/2020/24ja/24ja126/abstract.php">PSFC REPORT PSFC/JA-24-126</a><br /><br />This work was supported by the U.S. Department of Energy under Contract Numbers DE-AC02-09CH11466, DE-SC0022270, DE-SC0022272, and the Department of Energy Early Career Research Program. The United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.<br /><br />If this record does not contain the full text, then the manuscript has been embargoed by the publisher thus restricting open access for 12 to 24 months after publication. |
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Methodology and Processing |
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Sources Statement |
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Data Access |
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Notes: |
<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a> |
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Other Study Description Materials |
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Label: |
24ja126_archival_manuscript.pdf |
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Text: | |
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Notes: |
application/pdf |