Results 11 to 20 of about 119,276 (274)
Nuclear Materials and Energy, 2020 The transport as well as accumulation of tungsten (W) impurity is one of the critical issues for the W divertor operation. The EAST tokamak with W and graphite divertor targets, provides a good platform for the investigation of W impurity behaviors.
Qingrui Zhou +6 more
doaj +1 more source
13C surface characterization of midplane and crown collector probes on DIII-D
Nuclear Materials and Energy, 2023 A dual collector probe system has been implemented on DIII-D for scrape-off-layer (SOL) impurity transport studies. These experiments injected isotopically enriched methane (13CD4) and sampled the impurities from this extrinsic, primary source with ...
J.D. Duran +13 more
doaj +1 more source
Charge dependence of neoclassical and turbulent transport of light impurities on MAST [PDF]
, 2015 Carbon and nitrogen impurity transport coefficients are determined from gas puff experiments carried out during repeat L-mode discharges on the Mega-Amp Spherical Tokamak (MAST) and compared against a previous analysis of helium impurity transport on ...
Casson, F. J. +10 more
core +2 more sources
IMPURITY TRANSPORT IN TOKAMAKS* [PDF]
, 1977 A review is given of the principle results of the neoclassical theory of impurity transport in tokamaks, emphasizing those collisionality regimes of most practical interest. Some new results are given for the case where there are several different impurity species present at the same time, with both hydrogenic and impurity ions in the Pfirsch ...
Rutherford, P. H. +4 more
openaire +1 more source
Anomalous impurity transport in plasmas [PDF]
Nuclear Fusion, 1983 The transport of hith Z impurities resulting from Compton and induced scattering by drift waves is found to be comparable in magnitude with base ion and electron transport when the fluctuation spectrum is obtained from a recent theory of drift turbulence. The anomalous frictional flux is marginally subdominant whilst the diffusion flux is enhanced over
Rogister, A., Hasselberg, G.
openaire +3 more sources
A comprehensive study on impurity behavior in LHD long pulse discharges
Nuclear Materials and Energy, 2017 Impurity behavior is studied in a variety of LHD (Large Helical Device) long pulse discharges, i.e. standard hydrogen plasmas, super dense core plasmas, helium plasmas with ICH (Ion Cyclotron Frequency Heating), multi-species plasmas mixed with H and He.
Y. Nakamura +14 more
doaj +1 more source
Turbulent transport of impurities and their effect on energy confinement [PDF]
, 2012 By presenting linear and nonlinear gyrokinetic studies, based on a balanced neutral beam injection deuterium discharge from the DIII-D tokamak, we demonstrate that impurities alter the scaling of the transport on the charge and mass of the main species ...
Candy, J. +3 more
core +2 more sources
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
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