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), 2018, Vol.13 (1)
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 , K. Nagaoka ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (11)
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 , B.J. Peterson ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (5)
摘要:Strong suppression of impurity accumulation is observed in long pulse hydrogen discharges with high power NBI (neutral beam injection) heating ( P nbi > 10 MW) on the large helical device (LHD), even in the impurity accumulation window where the intrinsic impuriti...
作者:K. Tanaka , M. Nakata ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (10)
摘要:The deuterium (D) operation was initiated in the LHD in 2017. In the first campaign of the D experiments, we successfully extended the high temperature regime in the LHD. The new record of the ion temperature ( T i) of 10 keV associated with the ion internal transport ...
作者:K. Tanaka , N. Tamura ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (12)
摘要:A new methodology to analyze non-linear components in perturbative transport experiments is introduced. The methodology has been experimentally validated in the Large Helical Device for the electron heat transport channel. Electron cyclotron resonance heating with different modul...
作者:K. Tanaka , Y. Suzuki ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (7)
摘要:We report the first observation of the formation of a magnetic island before the occurrence of mode locking in helical plasma. New analysis and observation techniques applied to the ECE signal and poloidal flow in LHD experiments yield the following results. (i) A magnetic island...
作者:... M. Nunami , K. Tanaka , M. Yagi
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (10)
摘要:Numerical diagnostics using 3D simulation data are carried out to capture fluctuation properties in helical plasmas. Here, ion-temperature-gradient (ITG) turbulence data are used and obtained by the gyrokinetic code, GKV-X, with realistic magnetic configuration. Fluctuations are ...
作者:K. Tanaka , T. Tokuzawa ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (6)
摘要:In the large helical device, plasma with more than 4% average beta was successfully produced by multi-pellet injections in a regime with a collisionality one order of magnitude lower than that in previous high-beta operations. An improvement in particle confinement was observed d...
作者:K. Tanaka , T. Tokuzawa ...
来源:[J].Nuclear Fusion(IF 2.734), 2019, Vol.59 (9)
摘要:The effects of resonant magnetic perturbation (RMP) field on impurity radiation, divertor footprint distribution, and core plasma transport are investigated in the detachment discharges of the Large Helical Device (LHD). The RMP with m / n = 1/1 mode creates an edge magnetic isla...
作者:K. Tanaka , Y. Yoshimura ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (10)
摘要:The dependence of the energy confinement and energy transport on the isotope mass is a long-standing open question in the stellarator community. With the recent upgrade of the Large Helical Device to allow for deuterium plasma operation, systematic isotope experiments could ...

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