A simple and fast method to calculate the coil currents and the external poloidal flux and magnetic field consistent with a given internal magnetohydrodynamic(MHD) equilibrium and coil geometry is presented. The const...A simple and fast method to calculate the coil currents and the external poloidal flux and magnetic field consistent with a given internal magnetohydrodynamic(MHD) equilibrium and coil geometry is presented. The constrained optimization technique employed allows to fix the exact position of the X-points. The external poloidal flux and field are calculated using Green's functions expressed in terms of elliptic integrals that are calculated using a fast and accurate routine.The calculation can be limited to the region between the plasma and the device wall. An example for a double null configuration is presented.展开更多
We extend a recently proposed Quantum Field Theory (QFT) approach to the Lifshitz formula, originally implemented for a real scalar field, to the case of a fluctuating vacuum Electromagnetic (EM) field, coupled to two...We extend a recently proposed Quantum Field Theory (QFT) approach to the Lifshitz formula, originally implemented for a real scalar field, to the case of a fluctuating vacuum Electromagnetic (EM) field, coupled to two flat, parallel mirrors. The general result is presented in terms of the invariants of the vacuum polarization tensors due to the media on each mirror. We consider mirrors that have small widths, with the zero-width limit as a particular case. We apply the latter to models involving graphene sheets, obtaining results which are consistent with previous ones.展开更多
This paper focuses on the analysis of properties of tungsten and its alloys,as this is a material employed in the first wall of a fusion reactor.Using different production processes and by adding different impurities ...This paper focuses on the analysis of properties of tungsten and its alloys,as this is a material employed in the first wall of a fusion reactor.Using different production processes and by adding different impurities to tungsten,new materials can be obtained,with varying physical,chemical and mechanical properties which may help to improve the application to specific situations.In particular,in this work,we investigate the mechanical properties of pure tungsten and tungsten carbide.In both systems,simulated states of metal loading are assessed and collected,using 3D calculation software for metals structures,given the results in terms of deformations.展开更多
基金supported by the Comisión Nacional de Energía Atómica, CNEA (Controlled Nuclear Fusion Program)CONICET (Grant PIP 11220200101929CO)。
文摘A simple and fast method to calculate the coil currents and the external poloidal flux and magnetic field consistent with a given internal magnetohydrodynamic(MHD) equilibrium and coil geometry is presented. The constrained optimization technique employed allows to fix the exact position of the X-points. The external poloidal flux and field are calculated using Green's functions expressed in terms of elliptic integrals that are calculated using a fast and accurate routine.The calculation can be limited to the region between the plasma and the device wall. An example for a double null configuration is presented.
文摘We extend a recently proposed Quantum Field Theory (QFT) approach to the Lifshitz formula, originally implemented for a real scalar field, to the case of a fluctuating vacuum Electromagnetic (EM) field, coupled to two flat, parallel mirrors. The general result is presented in terms of the invariants of the vacuum polarization tensors due to the media on each mirror. We consider mirrors that have small widths, with the zero-width limit as a particular case. We apply the latter to models involving graphene sheets, obtaining results which are consistent with previous ones.
基金This article is partially supported by National University of Cuyo,project C06/C57,Argentina.
文摘This paper focuses on the analysis of properties of tungsten and its alloys,as this is a material employed in the first wall of a fusion reactor.Using different production processes and by adding different impurities to tungsten,new materials can be obtained,with varying physical,chemical and mechanical properties which may help to improve the application to specific situations.In particular,in this work,we investigate the mechanical properties of pure tungsten and tungsten carbide.In both systems,simulated states of metal loading are assessed and collected,using 3D calculation software for metals structures,given the results in terms of deformations.
