英国物理学会
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作者:K. Nagaoka , K. Tanaka ...
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. Nagaoka , K. Nagasaki ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (10)
摘要:As the finalization of a hydrogen experiment towards the deuterium phase, the exploration of the best performance of hydrogen plasma was intensively performed in the large helical device. High ion and electron temperatures, T i and T e, of more than 6 keV we...
作者:K. Nagaoka , K. Mukai ...
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. Nagaoka , S. Kamio ...
来源:[J].Nuclear Fusion(IF 2.734), 2019, Vol.59 (7)
摘要:The achievements of the deuterium beam operation of a negative-ion-based neutral beam injector (N-NBI) in the large helical device (LHD) are reported. In beam operation in LHD-NBIs, both hydrogen (H) and deuterium (D) neutral beams were generated by changing the operation ga...
作者:K. Nagaoka , S. Inagaki ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (7)
摘要:Response of the plasma toroidal flow to the forward and backward transition between the nested and the stochastic magnetic field is studied using the charge exchange spectroscopy in the large helical device (LHD). Abrupt damping of toroidal flow associated with a transition from ...
作者:K. Nagaoka , A. Cappa ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (12)
摘要:Experiments of suppressing fast-ion-driven MHD instabilities such as energetic particle modes (EPMs) and global Alfvén eigenmodes (GAEs) have been made using a second harmonic x-mode electron cyclotron heating and current drive (ECCD) in the helical-axis heliotron device, He...
作者:K. Nagaoka , S. Murakami ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (8)
摘要:A simultaneous high ion temperature ( T i) and high electron temperature ( T e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron interna...
作者:K. Nagaoka , S. Murakami ...
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. Nagaoka , H. Takahashi ...
来源:[J].Nuclear Fusion(IF 2.734), 2019, Vol.59 (5)
摘要:The isotope effect on impurities and bulk ion particle transport is investigated by using the deuterium, hydrogen, and isotope mixture plasma in the Large Helical Device (LHD). A clear isotope effect is observed in the impurity transport but not the bulk ion transport. The i...
作者:K. Nagaoka , H. Takahashi ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (11)
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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