Results 11 to 20 of about 2,271,409 (257)
Gyrokinetic modelling of light to heavy impurity transport in tokamaks
, 2021 International audienceAbstract Impurity transport is numerically investigated for different types of impurity, such as helium (He), argon (Ar), and tungsten (W).
Gravier, Etienne +13 more
core +1 more source
Dissipation engineered directional filter for quantum ratchets
Physical Review Research, 2021 We demonstrate transport rectification in a Hermitian Hamiltonian quantum ratchet by a dissipative, dynamic impurity. While the bulk of the ratchet supports transport in both directions, the properly designed loss function of the local impurity acts as a
Zlata Fedorova +5 more
doaj +1 more source
Interaction-controlled impurity transport in trapped mixtures of ultracold bosons [PDF]
, 2022 We explore the dynamical transport of an impurity between different embedding majority species which are spatially separated in a double well. The transfer and storage of the impurity is triggered by dynamically changing the interaction strengths between
Pyzh, Maxim +2 more
core +1 more source
3D global impurity transport modeling with WallDYN and EMC3-Eirene
Nuclear Materials and Energy, 2018 The global impurity migration code WallDYN was coupled to the 3D scrape off layer plasma solver EMC3-Eirene in order to make WallDYN applicable to 3D, non-toroidally symmetric, geometries.
K. Schmid, T. Lunt
doaj +1 more source
Reproduction of collector probe deposition profiles using the far-SOL impurity transport code 3DLIM
Nuclear Materials and Energy, 2020 First results are reported from the 3D Monte Carlo far-SOL impurity transport code 3DLIM. Tungsten deposition profiles measured on a Collector Probe (CP) located in the far-SOL near the outer midplane, OMP, during W tracer experiments in DIII-D are ...
S.A. Zamperini +7 more
doaj +1 more source
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
Turbulent and neoclassical impurity transport in tokamak plasmas
, 2009 Impurity particle transport in tokamaks is studied using an electrostatic fluid model for main ion and impurity temperature gradient (ITG)͒ mode and trapped electron (TE͒) mode turbulence in the collisionless limit and neoclassical theory.
T. Fülöp +4 more
core +2 more sources
Impact of main ion pressure anisotropy on stellarator impurity transport [PDF]
, 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 ...
core +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