Results 1 to 10 of about 2,872,515 (340)

Suppression of anomalous impurity transport in NBI-heated W7-X plasmas

Nuclear Fusion, 2023
Radial impurity density profiles in two Wendelstein 7-X (W7-X) experiments heated by neutral beam injection (NBI) are analyzed with respect to their impurity transport properties.
T. Romba, F. Reimold, R.J.E. Jaspers, O.P. Ford, L. Vanó, T. Klinger, the W7-X Team   +6 more
doaj   +2 more sources

Josephson transport through a Hubbard impurity center [PDF]

Physical Review Letters, 2002
We investigate the Josephson transport through a thin semiconductor barrier containing impurity centers with the on-site Hubbard interaction $u$ of an arbitrary sign and strength.
A. V. Lopatin, L. I. Glazman, V. I. Kozub, V. M. Vinokur   +3 more
core   +3 more sources

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   +2 more sources

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, J.D. Elder, P.C. Stangeby, J.H. Nichols, D.C. Donovan, J.D. Duran, E.A. Unterberg, D.L. Rudakov   +7 more
doaj   +2 more sources

On neoclassical impurity transport in stellarator geometry [PDF]

Plasma Physics and Controlled Fusion, 2013
The impurity dynamics in stellarators has become an issue of moderate concern due to the inherent tendency of the impurities to accumulate in the core when the neoclassical ambipolar radial electric field points radially inwards (ion root regime).
Beidler C D, Beidler C D Maaßberg H, C D Beidler, Dobrott D R, H Maaßberg, Helander P, Hirsch M, J M García-Regaña, Kauffmann K, Kornilov V, Maaßberg H, Nakamura Y, P Helander, R Kleiber, Y Turkin   +14 more
core   +4 more sources

The importance of the classical channel in the impurity transport of optimized stellarators [PDF]

Journal of Plasma Physics, 2019
In toroidal magnetic confinement devices, such as tokamaks and stellarators, neoclassical transport is usually an order of magnitude larger than its classical counterpart.
Buller, S., Mollén, A., Newton, S. L., Pusztai, I., Smith, H. M.   +4 more
core   +4 more sources

Impurity Transport in a Mixed-Collisionality Stellarator Plasma. [PDF]

Physical Review Letters, 2017
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 rise uncontrollably in the center of the plasma and spoil the energy ...
P. Helander, S. Newton, A. Mollén, H. Smith   +3 more
semanticscholar   +6 more sources

Analytical model for the combined effects of rotation and collisionality on neoclassical impurity transport

Plasma Physics and Controlled Fusion, 2023
The influence of rotation, collisionality and trapped particle fraction on the magnitude and direction of neoclassical impurity transport in tokamaks is analyzed using an extensive database of drift-kinetic simulations with the NEO code. It is shown that
D. Fajardo, C. Angioni, F. Casson, A. Field, P. Maget, P. Manas   +5 more
semanticscholar   +1 more source

Topological transport of mobile impurities [PDF]

Physical Review B, 2021
We study the Hall response of topologically trivial mobile impurities (Fermi polarons) interacting weakly with majority fermions forming a Chern-insulator background. This setting involves a rich interplay between the genuine many-body character of the polaron problem and the topological nature of the surrounding cloud.
Pimenov, D., Camacho-Guardian, A., Goldman, N., Massignan, P., Bruun, G. M., Goldstein, M.   +5 more
openaire   +5 more sources

Tungsten core accumulation study in EAST plasma with lower tungsten divertor by kinetic impurity transport model

Nuclear Materials and Energy, 2022
Tungsten (W) impurity transport and the corresponding core W accumulation is a critical issue in tokamak with W as plasma facing material. In this work, a kinetic W impurity transport code based on the guiding center approximation is applied for the ...
Yihan Wu, Qingrui Zhou, Chaofeng Sang, Yanjie Zhang, Yilin Wang, Dezhen Wang   +5 more
doaj   +1 more source