Results 11 to 20 of about 23,557 (298)
Observation of tearing mode triggering by sawtooth crash with high-Z impurity accumulation in EAST
AIP Advances, 2023 The high-Z impurity accumulation in the plasma core could degrade the plasma performance and may affect sawtooth crash and trigger tearing modes (TMs) in experimental advanced superconducting tokamak (EAST).
Shanshan Pan +11 more
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TRANSPORT IN LUTTINGER LIQUIDS WITH STRONG IMPURITIES [PDF]
International Journal of Modern Physics B, 2007 The tunnel current of a Luttinger liquid with a finite density of strong impurities is calculated using an instanton approach. For very low temperatures T or electric fields E the (nonlinear) conductivity is of variable range hopping (VRH) type as for weak pinning.
Malinin, S., Nattermann, T.
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Nuclear Fusion, 2023 We assess the turbulent particle transport being responsible for the limitation of the confinement and, thus, the overall performance of the neoclassically optimized stellarator Wendelstein 7-X.
J.A. Alcusón +15 more
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OEDGE modeling of far-SOL tungsten impurity sources and screening in WEST
Nuclear Materials and Energy, 2022 The plasma background and impurity transport in the scrape-off layer (SOL) of the WEST tokamak are modeled for three discharges over a Psep power scan ranging between 1.5 and 2.35 MW. An extended modeling grid is used to investigate far-SOL sourcing from
J.B. Maeker +10 more
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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
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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
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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
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Josephson Transport through a Hubbard Impurity Center [PDF]
Physical Review Letters, 2003 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. We find that in the case of the repulsive interaction the Josephson current changes sign with the temperature increase if the energy of the impurity level $ε$ (measured from ...
Kozub, V. I. +2 more
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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
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TRANSPORT IN QUANTUM WIRES WITH IMPURITIES AT FINITE TEMPERATURE [PDF]
Recent Progress in Many-Body Theories, 2002 The temperature dependence of Coulomb blockade peaks of a one dimensional quantum dot is calculated. The Coulomb interaction is treated microscopically using the Luttinger liquid model. The electron interaction is assumed to be non-homogeneous with a maximum strength near the quantum dot.
T. Kleimann, SASSETTI, MAURA, B. Kramer
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