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Observation of magnetohydrodynamic instabilities in Heliotron J plasmas

Yamamoto, S; Nagasaki, Kazunobu; Suzuki, Y; Mizuuchi, T; Okada, H; Kobayashi, S; Blackwell, Boyd; Kondo, Katsumi; Motojima, G; Nakajima, N; Nakamura, Yuji; Nuhrenberg, C; Torii, Y; Watanabe, S; Sano, F

Description

Two kinds of magnetohydrodynamics instability are observed in electron cyclotron heating and neutral beam injection-heated Heliotron J plasmas. One is the pressure-driven interchange modes with m = 2/n = 1 and m = 5/n = 3 and low frequency (fexp < 20 kHz), which are observed in the plasma with a rational surface of 1/2π= 0.5 or 0.65. The other is the energetic ion-driven global Alfvén eigenmodes (GAEs) in the Alfvén frequency range. To identify the observed GAEs, the frequency of the observed...[Show more]

dc.contributor.authorYamamoto, S
dc.contributor.authorNagasaki, Kazunobu
dc.contributor.authorSuzuki, Y
dc.contributor.authorMizuuchi, T
dc.contributor.authorOkada, H
dc.contributor.authorKobayashi, S
dc.contributor.authorBlackwell, Boyd
dc.contributor.authorKondo, Katsumi
dc.contributor.authorMotojima, G
dc.contributor.authorNakajima, N
dc.contributor.authorNakamura, Yuji
dc.contributor.authorNuhrenberg, C
dc.contributor.authorTorii, Y
dc.contributor.authorWatanabe, S
dc.contributor.authorSano, F
dc.date.accessioned2015-12-07T22:19:13Z
dc.identifier.issn1536-1055
dc.identifier.urihttp://hdl.handle.net/1885/19231
dc.description.abstractTwo kinds of magnetohydrodynamics instability are observed in electron cyclotron heating and neutral beam injection-heated Heliotron J plasmas. One is the pressure-driven interchange modes with m = 2/n = 1 and m = 5/n = 3 and low frequency (fexp < 20 kHz), which are observed in the plasma with a rational surface of 1/2π= 0.5 or 0.65. The other is the energetic ion-driven global Alfvén eigenmodes (GAEs) in the Alfvén frequency range. To identify the observed GAEs, the frequency of the observed mode with shear Alfvén spectra calculated by CAS3D3 is compared. The interchange mode with m= 5M = 3 and bursting GAE with intense magnetic fluctuations may affect the bulk plasma confinement and energetic ion transport, respectively.
dc.publisherAmerican Nuclear Society
dc.sourceFusion Science and Technology
dc.subjectKeywords: Electron cyclotron resonance; Magnetohydrodynamics; Neutron beams; Particle accelerators; Particle beam injection; Plasma confinement; Plasma heating; Transport properties; Alfvén eigenmodes; Interchange modes; Magnetic fluctuations; Magnetohydrodynamic i Advanced stellarator; Alfvén eigenmodes; MHD instabilities
dc.titleObservation of magnetohydrodynamic instabilities in Heliotron J plasmas
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume51
dc.date.issued2007
local.identifier.absfor020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges
local.identifier.ariespublicationu4515298xPUB7
local.type.statusPublished Version
local.contributor.affiliationYamamoto, S, Osaka University
local.contributor.affiliationNagasaki, Kazunobu , Kyoto University
local.contributor.affiliationSuzuki, Y, National Institute for Fusion Science
local.contributor.affiliationMizuuchi, T, Kyoto University
local.contributor.affiliationOkada, H, Saitama Medical College
local.contributor.affiliationKobayashi, S, Pennsylvania State University
local.contributor.affiliationBlackwell, Boyd, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKondo, Katsumi, Kyoto University
local.contributor.affiliationMotojima, G, Kyoto University
local.contributor.affiliationNakajima, N, National Institute for Fusion Science
local.contributor.affiliationNakamura, Yuji, Kyoto University
local.contributor.affiliationNuhrenberg, C, Max Planck Institute for Plasma Physics
local.contributor.affiliationTorii, Y, Kyoto University
local.contributor.affiliationWatanabe, S, Kyoto University
local.contributor.affiliationSano, F, Kyoto University
local.description.embargo2037-12-31
local.bibliographicCitation.startpage92
local.bibliographicCitation.lastpage96
dc.date.updated2015-12-07T08:32:42Z
local.identifier.scopusID2-s2.0-33846892073
CollectionsANU Research Publications

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