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DC Field | Value | Language |
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dc.citation.number | 5 | - |
dc.citation.startPage | 056112 | - |
dc.citation.title | PHYSICS OF PLASMAS | - |
dc.citation.volume | 18 | - |
dc.contributor.author | Okabayashi, M. | - |
dc.contributor.author | Matsunaga, G. | - |
dc.contributor.author | deGrassie, J. S. | - |
dc.contributor.author | Heidbrink, W. W. | - |
dc.contributor.author | In, Yongkyoon | - |
dc.contributor.author | Liu, Y. Q. | - |
dc.contributor.author | Reimerdes, H. | - |
dc.contributor.author | Solomon, W. M. | - |
dc.contributor.author | Strait, E. J. | - |
dc.contributor.author | Takechi, M. | - |
dc.contributor.author | Asakura, N. | - |
dc.contributor.author | Budny, R. V. | - |
dc.contributor.author | Jackson, G. L. | - |
dc.contributor.author | Hanson, J. M. | - |
dc.contributor.author | La Haye, R. J. | - |
dc.contributor.author | Lanctot, M. J. | - |
dc.contributor.author | Manickam, J. | - |
dc.contributor.author | Shinohara, K. | - |
dc.contributor.author | Zhu, Y. B. | - |
dc.date.accessioned | 2023-12-22T06:10:11Z | - |
dc.date.available | 2023-12-22T06:10:11Z | - |
dc.date.created | 2018-03-05 | - |
dc.date.issued | 2011-05 | - |
dc.description.abstract | An energetic-particle (EP)-driven "off-axis-fishbone-like mode (OFM)" often triggers a resistive wall mode (RWM) in JT-60U and DIII-D devices, preventing long-duration high-beta(N) discharges. In these experiments, the EPs are energetic ions (70-85 keV) injected by neutral beams to produce high-pressure plasmas. EP-driven bursting events reduce the EP density and the plasma rotation simultaneously. These changes are significant in high-beta(N) low-rotation plasmas, where the RWM stability is predicted to be strongly influenced by the EP precession drift resonance and by the plasma rotation near the q = 2 surface (kinetic effects). Analysis of these effects on stability with a self-consistent perturbation to the mode structure using the MARS-K code showed that the impact of EP losses and rotation drop is sufficient to destabilize the RWM in low-rotation plasmas, when the plasma rotation normalized by Alfven frequency is only a few tenths of a percent near the q = 2 surface. The OFM characteristics are very similar in JT-60U and DIII-D, including nonlinear mode evolution. The modes grow initially like a classical fishbone, and then the mode structure becomes strongly distorted. The dynamic response of the OFM to an applied n = 1 external field indicates that the mode retains its external kink character. These comparative studies suggest that an energetic particle-driven " off-axis-fishbone-like mode" is a new EP-driven branch of the external kink mode in wall-stabilized plasmas, analogous to the relationship of the classical fishbone branch to the internal kink mode. | - |
dc.identifier.bibliographicCitation | PHYSICS OF PLASMAS, v.18, no.5, pp.056112 | - |
dc.identifier.doi | 10.1063/1.3575159 | - |
dc.identifier.issn | 1070-664X | - |
dc.identifier.scopusid | 2-s2.0-79958790017 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/23767 | - |
dc.identifier.url | http://aip.scitation.org/doi/10.1063/1.3575159 | - |
dc.identifier.wosid | 000292209500100 | - |
dc.language | 영어 | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Off-axis fishbone-like instability and excitation of resistive wall modes in JT-60U and DIII-D | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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