F.J. Escoto

Evaluation of neoclassical transport in nearly quasi-isodynamic stellarator magnetic fields using MONKES

F.J. Escoto, J. L. Velasco, I. Calvo, E. Sánchez

Abstract Stellarator magnetic fields that are perfectly optimized for neoclassical transport (with levels of radial neoclassical transport comparable to tokamaks) are called omnigenous. Quasi-isodynamic (QI) magnetic fields are a subset of omnigenous magnetic fields in which the isolines of the magnetic field …

Piecewise Omnigenous Stellarators

J. L. Velasco, I. Calvo, F.J. Escoto, E. Sánchez et autres

In omnigenous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to omnigenity in any candidate for a stellarator fusion reactor. However, approaching omnigenity imposes severe …

us (code pays fourni par la source)

Evaluation of neoclassical transport in nearly quasi-isodynamic stellarator magnetic fields using MONKES

F.J. Escoto, J. L. Velasco, I. Calvo

Stellarator magnetic fields that are perfectly optimized for neoclassical transport (with levels of radial neoclassical transport comparable to tokamaks) are called omnigenous. Quasi-isodynamic magnetic fields are a subset of omnigenous magnetic fields in which the isolines of the magnetic field strength close …

Overview of the first Wendelstein 7-X long pulse campaign with fully water-cooled plasma facing components

O. Grulke, Christopher G. Albert, P. Aleynikov, K. Aleynikova et autres

Abstract After a long device enhancement phase, scientific operation resumed in 2022. The main new device components are the water cooling of all plasma facing components and the new water-cooled high heat flux divertor units. Water cooling allowed for the first long-pulse …

de, dk, at, es, hu, it, gr, us, nl, fr, be, ua, pl (code pays fourni par la source)

Density profiles in stellarators: an overview of particle transport, fuelling and profile shaping studies at TJ-II

A. Alonso, D. Alegre, R. Antón, A. Arias-Camisón et autres

Abstract We provide an overview of activities carried out at the TJ-II stellarator for improving our understanding of- and developing plasma physics models for particle density profiles in stellarators. Namely, we report on recent progress in turbulent particle transport simulation, validation of …

es, gb, ua, bg, hu, us, jp, pt (code pays fourni par la source)

Piecewise omnigenous stellarators

J. L. Velasco, I. Calvo, F.J. Escoto

In omnigeneous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to omnigenity in any candidate for a stellarator fusion reactor. However, approaching omnigenity imposes severe …

MONKES: a fast neoclassical code for the evaluation of monoenergetic transport coefficients in stellarator plasmas

F.J. Escoto, J. L. Velasco, I. Calvo, Matt Landreman et autres

Abstract MONKES is a new neoclassical code for the evaluation of monoenergetic transport coefficients in stellarators. By means of a convergence study and benchmarks with other codes, it is shown that MONKES is accurate and efficient. The combination of spectral discretization in …

es, us (code pays fourni par la source)

MONKES: a fast neoclassical code for the evaluation of monoenergetic transport coefficients

F.J. Escoto, J. L. Velasco, I. Calvo, Matt Landreman et autres

MONKES is a new neoclassical code for the evaluation of monoenergetic transport coefficients in stellarators. By means of a convergence study and benchmarks with other codes, it is shown that MONKES is accurate and efficient. The combination of spectral discretization in spatial …

Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X

T. S. Pedersen, I. Abramovic, P. Agostinetti, M. Agredano Torres et autres

Abstract We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have been maintained for tens …

de, us, es, hu, fr, it, ch, ua, au, nl, gb, gr, pl (code pays fourni par la source)

Overview of the TJ-II stellarator research programme towards model validation in fusion plasmas

C. Hidalgo, E. Ascasíbar, D. Alegre, A. Alonso et autres

Abstract TJ-II stellarator results on modelling and validation of plasma flow asymmetries due to on-surface potential variations, plasma fuelling physics, Alfvén eigenmodes (AEs) control and stability, the interplay between turbulence and neoclassical (NC) mechanisms and liquid metals are reported. Regarding the validation …

de, es, ua, ru, jp, hu, us, cn, pt, gb (code pays fourni par la source)