英国物理学会
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作者:T. Ido , K. Ida ...
来源:[J].Plasma Science and Technology(IF 0.514), 2009, Vol.11 (4), pp.377-380IOP
摘要:In the large helical device (LHD) having three dimensional configuration, Alfvén eigenmodes (AEs) destabilized by energetic ions are widely investigated using neutral beam heated plasmas with monotonic and non-monotonic rotational transform (ι/2π) profiles. In a plasma with ...
作者:T. Ido , M. Kojima ...
来源:[J].Nuclear Fusion(IF 2.734), 2010, Vol.50 (2), pp.025001 (9pp)IOP
摘要:Density and potential fluctuations were measured in the core region of the JIPP-TIIU plasma using a heavy ion beam probe. By applying a new technique of wavenumber resolved bicoherence, the coupling of the drift waves with zonal flows was clearly observed. In addition, nonli...
作者:T. Ido , M. Kojima ...
来源:[J].Nuclear Fusion(IF 2.734), 2011, Vol.51 (3), pp.033005 (7pp)IOP
摘要:The broad and intense spectrum of the geodesic acoustic mode (GAM) oscillations near the magnetic axis of tokamak plasmas with T e/ T i 1 becomes narrow and weak during neutral beam heating. It then becomes wide and weak during third harmonics ICRF heatin...
作者:T. Ido , A. Shimizu ...
来源:[J].Nuclear Fusion(IF 2.734), 2011, Vol.51 (8), pp.083022 (7pp)IOP
摘要:The peaked ion-temperature profile with steep gradient, the so-called ion internal transport barrier (ion ITB), was formed in the neutral beam heated plasmas on the Large Helical Device and the high-ion-temperature regime of helical plasmas has been significantly extended. The io...
作者:T. Ido , A. Shimizu ...
来源:[J].Nuclear Fusion(IF 2.734), 2011, Vol.51 (8), pp.083029 (5pp)IOP
摘要:The transition to the improved confinement mode by electrode biasing was observed for the first time in the Large Helical Device (LHD). A negative resistance was observed in the confinement mode sustained by the cold electrode biasing. The electrode current showed a clear decreas...
作者:T. Ido , M. Kojima ...
来源:[J].Nuclear Fusion(IF 2.734), 2012, Vol.52 (6), pp.063023 (11pp)IOP
摘要:The radial extent of kinetic geodesic acoustic modes (KGAMs) and streamers is measured using a heavy ion beam probe. Intense KGAM oscillations are observed in the core region of a low-density ohmic (OH) plasma where Te ≫ Ti and outside this region, stre...
作者:T. Ido , E. Ascasíbar ...
来源:[J].Nuclear Fusion(IF 2.734), 2013, Vol.53 (7)IOP
摘要:Alfvén eigenmode (AE) activity driven by NBI-produced fast ions is observed in TJ-II plasmas. A two-step response of the measured AEs to electron cyclotron heating (ECH) power is seen. In a first step, the continuous character of the unstable AEs changes to a chirping charac...
作者:T. Ido , A. Shimizu ...
来源:[J].Nuclear Fusion(IF 2.734), 2013, Vol.53 (7)IOP
摘要:A central ion temperature of 7 keV in a neutral beam injection (NBI)-heated plasma and a central-electron temperature of 20 keV in an electron cyclotron resonance heating plasma were achieved in the Large Helical Device (LHD) using an upgraded heating system with a newly installe...
作者:T. Ido , A. Shimizu ...
来源:[J].Nuclear Fusion(IF 2.734), 2013, Vol.53 (7)IOP
摘要:Electrode biasing experiments were carried out in various magnetic configurations on the Large Helical Device (LHD). The transitions of poloidal viscosity, which were accompanied with bifurcation phenomena characterized by a negative resistance in an electrode characteristic, wer...

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