In this paper, the theory of collisional and turbulent transport of impurities in tokamak
plasmas is reviewed. The results are presented with the aim of providing at the same time a …

The differences and similarities between the internal transport barriers (ITBs) of tokamak and
helical plasmas are reviewed. By comparing the characteristics of the ITBs in tokamak and …

Since the last IAEA Fusion Energy Conference in 2018, significant progress of the
experimental program of HL-2A has been achieved on develo** advanced plasma …

Abstract The Large Helical Device (LHD) is a heliotron-type device employing large-scale
superconducting magnets to enable advanced studies of net-current-free plasmas. The …

A potential threat to the performance of magnetically confined fusion plasmas is the problem
of impurity accumulation, which causes the concentration of highly charged impurity ions to …

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 …

The impurity transport in magnetically confined plasmas under some conditions finds neither
quantitatively nor qualitatively a satisfactory theory-based explanation. This compromises …

The large helical device (LHD) is one of the world's largest superconducting helical system
fusion-experiment devices. Since the start of experiments in 1998, LHD has extended its …

A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic
simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out …

Large Helical Device (LHD) is one of the world largest superconducting fusion experiment
devices, having demonstrated its inherent advantage for steady-state operation since the …