英国物理学会
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作者:K. Tanaka , M. Nishiura ...
来源:[J].Journal of Instrumentation(IF 1.869), 2015, Vol.10 (12)IOP
摘要:Microwave collective Thomson scattering (CTS) by using a 77 GHz gyrotron is routinely working in LHD and the improvements of the system is now underway. The targets of this diagnostic are measurements of energetic fast ion distribution and ion ratio. In the present system, 800kW ...
作者:K. Tanaka , K. Nagaoka ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (11)IOP
摘要:Surveys of the ion and electron heat transports of neutral beam (NB) heating plasma were carried out by power balance analysis in He and H rich plasma at LHD. Collisionality was scanned by changing density and heating power. The characteristics of the transport vary dependin...
作者:K. Tanaka , M. Nishiura ...
来源:[J].Journal of Instrumentation(IF 1.869), 2018, Vol.13 (01)IOP
摘要:Collective Thomson scattering (CTS) was developed by using a 154 GHz gyrotron, and the first data has been obtained. Already, 77 GHz CTS has worked successfully. However, in order to access higher density region, 154 GHz option enhances the usability that reduces the refraction e...
作者:K. Tanaka , R. Seki ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (2)IOP
摘要:A collective Thomson scattering (CTS) diagnostic was developed and used to measure the bulk and fast ions originating from 180 keV neutral beams in the Large Helical Device (LHD). Electromagnetic waves from a gyrotron at 77 GHz with 1 MW power output function as both the pro...
作者:K. Tanaka , S. Sakakibara ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (3)IOP
摘要:In the Large Helical Device (LHD), H-mode plasmas are produced, having large amplitude edge-localized modes (ELMs) which are induced by resistive interchange modes (RICs) at the ι /2 π = 1 rational surface near the foot of the edge transport barrier (ETB). These large ELMs e...
作者:K. Tanaka , S. Maeyama
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (4)IOP
摘要:Turbulent transport in a high ion temperature discharge of the Large Helical Device (LHD) is investigated by means of electromagnetic gyrokinetic simulations, which include kinetic electrons, magnetic perturbations, and full geometrical effects. Including kinetic electrons enable...
作者:... R. Yasuhara , H. Funaba , K. Tanaka
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)IOP
摘要:Impurity seeding to reduce the divertor heat load was conducted in the large helical device (LHD) using neon (Ne) and krypton (Kr) puffing. Radiation enhancement and reduction of the divertor heat load were observed. In the LHD, the ratio between the total radiated power and...
作者:... H. Takahashi , H. Nakano , K. Tanaka
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)IOP
摘要:Time evolution of carbon density during impurity-hole formation is observed on the Large Helical Device (LHD) to study the dynamic behaviors of the carbon impurity flux. The flux of carbon impurity changes from inward to outward without significant change of plasma parameters in ...
作者:K. Tanaka , T. Tokuzawa ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)IOP
摘要:Effects of low- n magnetohydrodynamic instabilities on plasma performance have been assessed in the regime where an achieved beta value is limited by instabilities. The unstable regime of an ideal interchange mode is characterized by enhanced magnetic hill and reduced magnetic sh...
作者:K. Tanaka , N. Tamura ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (11)IOP
摘要:The discharge scenario of high temperature plasma with a helical configuration has significantly progressed. The increase of central ion temperature due to the reduction of wall recycling was clearly observed. The peaking of the ion heating profile and the reduction of charge exc...

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