Results 11 to 20 of about 504,429 (107)
A single-field-period quasi-isodynamic stellarator
Journal of Plasma Physics, 2022 A single-field-period quasi-isodynamic stellarator configuration is presented. This configuration, which resembles a twisted strip, is obtained by the method of direct construction, that is, it is found via an expansion in the distance from the magnetic axis.
Jorge, R. +6 more
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Trapped-particle Instabilities in Quasi-isodynamic Stellarators [PDF]
, 2014 The confinement of energy has always been a challenge in magnetic confinement fusion devices. Due to their toroidal shape there exist regions of high and low magnetic field, so that the particles are divided into two classes - trapped ones that are ...
Proll, Josefine Henriette Elise
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Direct construction of large aspect ratio quasi-isodynamic stellarators [PDF]
, 2023 This work presents an exploration into the use of the near-axis expansion (NAE) method, a first-order expansion of the magnetohydrodynamic equations, to construct quasi-isodynamic (QI) stellarators with low neoclassical confinement, at finite aspect ...
Camacho Mata, Katia
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Helicity of the magnetic axes of quasi-isodynamic stellarators
Journal of Plasma Physics, 2023 In this study, we explore the influence of the helicity of the magnetic axis – defined as the self-linking number of the curve – on the quality of quasi-isodynamic stellarator-symmetric configurations constructed using the near-axis expansion method (Plunk et al., J. Plasma Phys., vol. 85, 2019, 905850602; Camacho Mata et al., J. Plasma Phys., vol. 88,
Camacho Mata, Katia, Plunk, Gabriel G.
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Supplementary material for paper "The maximum-J property in quasi-isodynamic stellarators"
, 2023 <p>Supporting material for the paper "The maximum-J property in quasi-isodynamic stellarators". It includes scripts used for the paper (including the creation of figures), equilibria files and supporting Mathematica notebooks for near-axis algebra ...
Eduardo Rodriguez
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Introducing isodynamic points for binary forms and their ratios
, 2023 The isodynamic points of a plane triangle are known to be the only pair of its centers invariant under the action of the Möbius group M on the set of triangles, Kimberling (Encyclopedia of Triangle Centers, http://faculty.evansville.edu/ck6/encyclopedia).
Shapiro, Michael +2 more
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The maximum-J property in quasi-isodynamic stellarators
Journal of Plasma PhysicsSome stellarators tend to benefit from favourable average magnetic curvature for trapped particles when the plasma pressure is sufficiently high. This so-called maximum- $J$ property has several positive implications, such as good fast-particle confinement, magnetohydrodynamic stability and suppression of certain trapped ...
Rodríguez, E. +2 more
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Critical gradient optimisation for quasi-isodynamic stellarators
Journal of Plasma PhysicsWe present new and updated methods for reducing transport caused by electrostatic ion-temperature-gradient (ITG) driven turbulence in quasi-isodynamic (QI) configurations. We first show an updated model for the threshold (critical) gradient of localised toroidal ITG modes.
Gareth Roberg-Clark +3 more
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Geometry effects on zonal flow dynamics and turbulent transport in optimized stellarators
Nuclear FusionGlobal gyrokinetic simulations find a strong suppression of ion temperature gradient (ITG) turbulence by zonal flows in stellarators optimized for neoclassical transport.
Haotian Chen +3 more
doaj +1 more source
Near-axis quasi-isodynamic database
Journal of Plasma PhysicsIn this work we investigate the landscape of quasi-isodynamic (QI) stellarators using the near-axis expansion of the magnetic field. Building on recent theoretical developments, we construct a database of more than 800 000 stable, approximately QI vacuum magnetic configurations.
Eduardo Rodríguez, Gabriel Plunk
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