Results 31 to 40 of about 2,872,515 (340)
Light impurity transport in tokamaks: on the impact of neutral beam fast ions
Nuclear Fusion, 2020 Previous studies (e.g. (Kappatou 2019 Nucl. Fusion 59 056014)) have shown that discrepancies exist between experimental and modelled light impurity peaking in specific regimes. In particular, in NBI heated plasmas, the strong hollowness of boron profiles
P. Manas +3 more
semanticscholar +1 more source
Code/Code comparison of impurity transport in EMC3 and DIVIMP
Physica Scripta, 2020 Recently, the global impurity migration code WallDYN was coupled to the 3D edge transport code EMC3-Eirene in order to make WallDYN applicable to 3D, non-toroidally symmetric, geometries.
K. Schmid, T. Lunt, W. Zhang
semanticscholar +1 more source
Impurity and Trace Tritium Transport in Tokamak Edge Turbulence [PDF]
, 2004 The turbulent transport of impurity or minority species, as for example Tritium, is investigated in drift-Alfv\'en edge turbulence. The full effects of perpendicular and parallel convection are kept for the impurity species. The impurity density develops
M. E. Perry +3 more
core +1 more source
Impact of main ion pressure anisotropy on stellarator impurity transport [PDF]
Nuclear Fusion, 2019 Main ions influence impurity dynamics through a variety of mechanisms; in particular, via impurity-ion collisions. To lowest order in an expansion in the main ion mass over the impurity mass, the impurity-ion collision operator only depends on the ...
I. Calvo +3 more
semanticscholar +1 more source
Spin quadrupoletronics: moving spin anisotropy around [PDF]
, 2010 We show that spin anisotropy can be transferred to an isotropic system by transport of spin quadrupole moment. We derive the quadrupole moment current and continuity equation and study a high-spin valve structure consisting of two ferromagnets coupled to
Baumgärtel, Michael +3 more
core +2 more sources
Impurity ion transport by filamentary plasma structures
Nuclear Materials and Energy, 2019 We have studied the impurity ion transport by a filamentary plasma structure with the three-dimensional electrostatic particle-in-cell simulation. The effective diffusivity of the impurity ions transported by a filamentary plasma structure has been ...
Hiroki Hasegawa, Seiji Ishiguro
doaj +1 more source
Refining light impurity content estimates at the lower divertor based on experimental data in WEST
Nuclear Materials and Energy, 2023 WEST is an actively cooled, long-pulse tokamak with nearly all plasma-facing components (PFC) made of tungsten (W). One of the aims of WEST is to study plasma operation with W PFCs in preparation for long-pulse operation on W divertor devices like ITER ...
A. Grosjean +7 more
doaj +1 more source
Nuclear Fusion, 2023 Mitigating tungsten (W) wall erosion and core accumulation are vitally important for the steady-state operation of tokamaks. It is well known that drifts have a great impact on the transport of charged particles in the edge region, which could affect W ...
Yilin Wang +6 more
doaj +1 more source
Contrasting influence of charged impurities on transport and gain in terahertz quantum cascade lasers [PDF]
, 2015 Transport and gain properties of a resonant-phonon terahertz quantum cascade laser are calculated using nonequilibrium Green's functions. Impurity scattering is shown to be responsible for contrasting nonlinear effects in the transport and the gain ...
Grange, Thomas
core +2 more sources
Nuclear Fusion, 2019 The transport of heavy impurities has been investigated at the Wendelstein 7-X stellarator during core electron root confinement (CERC) experiments. Iron atoms were injected via the laser blow-off technique and analyzed by VUV and x-ray spectrometers ...
B. Geiger +38 more
semanticscholar +1 more source