Results 41 to 50 of about 120,584 (295)

Comparable levels of turbulent and neoclassical transport of high-Z impurities: integrated modelling in AUG, JET and C-Mod

Nuclear Fusion
Operation with beam heating is prone to central accumulation of high- Z impurities in present-day tokamaks due to a dominant neoclassical pinch. Fusion reactors are expected to have a different core transport regime for high- Z impurities, where ...
D. Fajardo, C. Angioni, C. Giroud, C. Perks, A. Loarte, M. Poradzinski, J. Rice, O. Samoylov, I. Carvalho, Z. Huang, D. Keeling, D. King, D. Kos, B. Labit, E. Litherland-Smith, S. Menmuir, N. Vianello, the ASDEX Upgrade Team, JET Contributors, the EUROfusion Tokamak Exploitation Team   +19 more
doaj   +1 more source

Transport measurement of the orbital Kondo effect with ultracold atoms

, 2016
The Kondo effect in condensed-matter systems manifests itself most sharply in their transport measurements. Here we propose an analogous transport signature of the orbital Kondo effect realized with ultracold atoms.
Nishida, Yusuke
core   +1 more source

Optimization of flux-surface density variation in stellarator plasmas with respect to the transport of collisional impurities [PDF]

, 2019
Avoiding impurity accumulation is a requirement for steady-state stellarator operation. The accumulation of impurities can be heavily affected by variations in their density on the flux-surface.
Buller, Stefan, Mollén, Albert, Newton, Sarah Louise, Pusztai, Istvan, Smith, Håkan M.   +4 more
core   +2 more sources

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

SOLPS-ITER modification for impurity transport modelling in the tokamak pedestal region

Nuclear Materials and Energy
Kinetic corrections to SOLPS-ITER fluid equations are made to extend their applicability for description of the neoclassical part of impurity transport to collisionless regimes of the main ions.
V. Korzueva, E. Kaveeva, V. Rozhansky, X. Bonnin   +3 more
doaj   +1 more source

Temperature dependent charge transport in ferroelectrically gated graphene far from the Dirac point

AIP Advances, 2022
Charge transport in ferroelectric (FE) gated graphene far from the Dirac point (DP) was studied in the temperature range 300 K < T < 350 K. A non-monotonic/monotonic/non-monotonic behavior in the conductivity [σ(T)] was observed as one moved away from ...
Kelotchi S. Figueroa, Natalya A. Zimbovskaya, Nicholas J. Pinto, Chengyu Wen, A. T. Charlie Johnson   +4 more
doaj   +1 more source

Effect of impurity effect on the electron cyclotron current drive

He jishu, 2022
BackgroundIn recent years, electron cyclotron wave (ECW) heating and current drive (ECCD) have been widely used in tokamak discharge experiments. The inevitable presence of impurity particles in the tokamak plasma affects the ECCD through radiation ...
YANG Guang, ZHONG Yijun, GONG Xueyu, HUANG Qianhong, ZHENG Pingwei, WANG Zhanhui   +5 more
doaj   +1 more source

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

Advanced Engineering Materials, EarlyView.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo, Daniela Winsley Valereto Friozi, Vinícius de Oliveira, Marcia Cristina Branciforti   +3 more
wiley   +1 more source

Impurity charge compensation in graphene by a polarized ferroelectric polymer and its effect on charge transport near the Dirac point

AIP Advances, 2021
Charge transport near the Dirac point (DP) was investigated in graphene using ferroelectric (FE) gating in the temperature range of 300 < T < 350 K. We observed that the conductivity (σ) near the DP had a positive temperature gradient that switched to a ...
Kelotchi S. Figueroa, Natalya A. Zimbovskaya, Nicholas J. Pinto, Chengyu Wen, A. T. Charlie Johnson   +4 more
doaj   +1 more source

Impurity transport in trapped electron mode driven turbulence

, 2013
Trapped electron mode turbulence is studied by gyrokinetic simulations with the GYRO code and an analytical model including the effect of a poloidally varying electrostatic potential. Its impact on radial transport of high-Z trace impurities close to the
Fülöp, T., Mollén, A., Moradi, S., Pusztai, I.   +3 more
core   +1 more source