Results 51 to 60 of about 464 (186)
A novel scheme for error field correction in permanent magnet stellarators
Nuclear Fusion, 2023 Stellarators offer a promising path towards fusion reactors, but their design and construction are complicated by stringent tolerance requirements on highly complex 3D coils. A potential way to simplify the engineering requirements for stellarators is to
A. Rutkowski +4 more
doaj +1 more source
Methods for Color Center Preserving Hydrogen‐Termination of Diamond
Advanced Materials Interfaces, Volume 11, Issue 24, August 23, 2024.Hydrogen‐termination of diamond by three methods. Hydrogen plasma exposure with stage heating above 700 °C yields maximal coverage but causes irr loss of shallow nitrogen‐vacancy fluorescence. Plasma exposure without heating preserves nitrogen‐vacancies at the expense of increased oxygen coverage.
Daniel J. McCloskey +8 more
wiley +1 more source
Symposium - International Astronomical Union, 1996 I review recent observational and theoretical progress in the study of condensations of cool material trapped in the coronae of rapidly rotating stars. Such condensations were discovered over a decade ago, producing transient moving absorption features in the optical Balmerseries lines.
openaire +2 more sources
Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.Abstract The distribution pattern of the connection length in the divertor region of Heliotron J was calculated by the field line tracing method. A multifold layer structure, characterized by the range of connection length, was revealed to interpret the response of the transport of the lower‐charged impurity ions to the divertor structure.
F. Cai +18 more
wiley +1 more source
Nuclear FusionStellarator plasmas are known to be very sensitive to perturbations in the magnetic field. The permanent magnet stellarator was in part developed as a solution to high machining tolerances placed on the shape properties of electromagnetic coils in ...
A. Chambliss +4 more
doaj +1 more source
Nuclear Fusion, 2023 The aim of this study is to analyze the linear stability of Alfvén eigenmodes (AE) in the QPS device heated by a tangential neutral beam injector (NBI). The analysis is performed using the gyro-fluid code FAR3d, that solves the reduced MHD equations for ...
J. Ortiz +4 more
doaj +1 more source
Toward plasma drifts in EMC3: Implementation of gradient, divergence, and particle tracing schemes
Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.Abstract This paper presents a first implementation of gradient, divergence, and particle tracing schemes for the EMC3 code, a stochastic 3D plasma fluid code widely employed for edge plasma and impurity transport modeling in tokamaks and stellarators.
Ruben De Wolf +6 more
wiley +1 more source
Gyrokinetic prediction of core tungsten peaking in a WEST plasma with nitrogen impurities
Nuclear FusionTungsten peaking is predicted in the core of a WEST plasma with total-f gyrokinetic simulations, including both collisional and turbulent transport. This prediction is validated with a synthetic diagnostic of the bolometry.
J. Dominski +9 more
doaj +1 more source
International Journal of Energy Research, Volume 2024, Issue 1, 2024.The present research presents an innovative approach by integrating magnetohydrodynamic (MHD) flow with resistive heating, integrating a partly permeable layer and interior heat production to scrutinize natural convective flow within a square domain. It also examines both straight and wavy interfaces between the porous and fluid domains.
Nahid Hasan +3 more
wiley +1 more source
Nonlinear saturation of ballooning modes in stellarators
Nuclear FusionBallooning mode saturation is investigated in realistic stellarator configurations using the flux tube approach of Ham et al (2018 Plasma Phys. Control. Fusion 60 075017), Ham et al (2016 Phys. Rev. Lett. 116 235001). The method is adapted to account for
X. Chu +4 more
doaj +1 more source