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DC Field | Value | Language |
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dc.citation.number | 5 | - |
dc.citation.startPage | 056117 | - |
dc.citation.title | PHYSICS OF PLASMAS | - |
dc.citation.volume | 24 | - |
dc.contributor.author | Lanctot, M. J. | - |
dc.contributor.author | Park, J. -K. | - |
dc.contributor.author | Piovesan, P. | - |
dc.contributor.author | Sun, Y. | - |
dc.contributor.author | Buttery, R. J. | - |
dc.contributor.author | Frassinetti, L. | - |
dc.contributor.author | Grierson, B. A. | - |
dc.contributor.author | Hanson, J. M. | - |
dc.contributor.author | Haskey, S. R. | - |
dc.contributor.author | In, Yongkyoon | - |
dc.contributor.author | Jeon, Y. M. | - |
dc.contributor.author | La Haye, R. J. | - |
dc.contributor.author | Logan, N. C. | - |
dc.contributor.author | Marrelli, L. | - |
dc.contributor.author | Orlov, D. M. | - |
dc.contributor.author | Paz-Soldan, C. | - |
dc.contributor.author | Wang, H. H. | - |
dc.contributor.author | Strait, E. J. | - |
dc.date.accessioned | 2023-12-21T22:13:36Z | - |
dc.date.available | 2023-12-21T22:13:36Z | - |
dc.date.created | 2018-03-05 | - |
dc.date.issued | 2017-05 | - |
dc.description.abstract | In several tokamaks, non-axisymmetric magnetic field studies show that applied magnetic fields with a toroidal harmonic n = 2 can lead to disruptive n = 1 locked modes. In Ohmic plasmas, n = 2 magnetic reconnection thresholds in otherwise stable discharges are readily accessed at edge safety factors q similar to 3, low density, and low rotation. Similar to previous studies with n = 1 fields, the thresholds are correlated with the "overlap" field computed with the IPEC code. The overlap field quantifies the plasma-mediated coupling of the external field to the resonant field. Remarkably, the "critical overlap fields" at which magnetic islands form are similar for applied n = 1 and 2 fields. The critical overlap field increases with plasma density and edge safety factor but is independent of the toroidal field. Poloidal harmonics m> nq dominate the drive for resonant fields while m < nq harmonics have a negligible impact. This contrasts with previous results in H-mode discharges at high plasma pressure in which the toroidal angular momentum is sensitive to low poloidal harmonics. Together, these results highlight unique requirements for n > 1 field control including the need for multiple rows of coils to control selected plasma parameters for specific functions (e.g., rotation control or ELM suppression). | - |
dc.identifier.bibliographicCitation | PHYSICS OF PLASMAS, v.24, no.5, pp.056117 | - |
dc.identifier.doi | 10.1063/1.4982688 | - |
dc.identifier.issn | 1070-664X | - |
dc.identifier.scopusid | 2-s2.0-85029903116 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/23744 | - |
dc.identifier.url | http://aip.scitation.org/doi/10.1063/1.4982688 | - |
dc.identifier.wosid | 000400817900134 | - |
dc.language | 영어 | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Impact of toroidal and poloidal mode spectra on the control of non-axisymmetric fields in tokamaks | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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