Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS

J. L. Velasco; I. Calvo; F. I. Parra; V. D'herbemont; H. M. Smith; D. Carralero; T. Estrada

doi:10.1088/1741-4326/ac1dc7

Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS

J. L. Velasco, I. Calvo, F. I. Parra, V. D'herbemont, H. M. Smith, D. Carralero, T. Estrada

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this work, a new version of KNOSOS is presented. KNOSOS is a low-collisionality radially-local, bounce-averaged neoclassical code that is extremely fast, and at the same time, includes physical effects often neglected by more standard codes: The component of the magnetic drift that is tangent to the flux-surface and the variation of the electrostatic potential on the flux-surface. An earlier version of the code could only describe configurations that were sufficiently optimized with respect to neoclassical transport. KNOSOS can now be applied to any large aspect ratio stellarator, and its performance is demonstrated by means of detailed simulations in the configuration space of Wendelstein 7-X.

Original language	English (US)
Article number	116013
Journal	Nuclear Fusion
Volume	61
Issue number	11
DOIs	https://doi.org/10.1088/1741-4326/ac1dc7
State	Published - Nov 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Keywords

magnetic confinement fusion
neoclassical theory
optimisation
stellarators
transport

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10.1088/1741-4326/ac1dc7

Cite this

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title = "Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS",

abstract = "In this work, a new version of KNOSOS is presented. KNOSOS is a low-collisionality radially-local, bounce-averaged neoclassical code that is extremely fast, and at the same time, includes physical effects often neglected by more standard codes: The component of the magnetic drift that is tangent to the flux-surface and the variation of the electrostatic potential on the flux-surface. An earlier version of the code could only describe configurations that were sufficiently optimized with respect to neoclassical transport. KNOSOS can now be applied to any large aspect ratio stellarator, and its performance is demonstrated by means of detailed simulations in the configuration space of Wendelstein 7-X.",

keywords = "magnetic confinement fusion, neoclassical theory, optimisation, stellarators, transport",

author = "Velasco, {J. L.} and I. Calvo and Parra, {F. I.} and V. D'herbemont and Smith, {H. M.} and D. Carralero and T. Estrada",

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doi = "10.1088/1741-4326/ac1dc7",

language = "English (US)",

volume = "61",

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T1 - Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS

AU - Velasco, J. L.

AU - Calvo, I.

AU - Parra, F. I.

AU - D'herbemont, V.

AU - Smith, H. M.

AU - Carralero, D.

AU - Estrada, T.

PY - 2021/11

Y1 - 2021/11

N2 - In this work, a new version of KNOSOS is presented. KNOSOS is a low-collisionality radially-local, bounce-averaged neoclassical code that is extremely fast, and at the same time, includes physical effects often neglected by more standard codes: The component of the magnetic drift that is tangent to the flux-surface and the variation of the electrostatic potential on the flux-surface. An earlier version of the code could only describe configurations that were sufficiently optimized with respect to neoclassical transport. KNOSOS can now be applied to any large aspect ratio stellarator, and its performance is demonstrated by means of detailed simulations in the configuration space of Wendelstein 7-X.

AB - In this work, a new version of KNOSOS is presented. KNOSOS is a low-collisionality radially-local, bounce-averaged neoclassical code that is extremely fast, and at the same time, includes physical effects often neglected by more standard codes: The component of the magnetic drift that is tangent to the flux-surface and the variation of the electrostatic potential on the flux-surface. An earlier version of the code could only describe configurations that were sufficiently optimized with respect to neoclassical transport. KNOSOS can now be applied to any large aspect ratio stellarator, and its performance is demonstrated by means of detailed simulations in the configuration space of Wendelstein 7-X.

KW - magnetic confinement fusion

KW - neoclassical theory

KW - optimisation

KW - stellarators

KW - transport

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Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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