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research article

Validation of the BEAMS3D neutral beam deposition model on Wendelstein 7-X

Lazerson, Samuel A.
•
Ford, Oliver P.
•
Nuehrenberg, Carolin
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July 1, 2020
Nuclear Fusion

The neutral beam deposition model in the BEAMS3D code is validated against neutral beam attenuation data from Wendelstein 7-X (W7-X). A set of experimental discharges where the neutral beam injection system of W7-X was utilized were reconstructed. These discharges scanned the magnetic configurations and plasma densities of W7-X. The equilibrium reconstructions were performed using STELLOPT which calculates three-dimensional self-consistent ideal magnetohydrodynamic equilibria and kinetic profiles. These reconstructions leveraged new capabilities to incorporate electron cyclotron emission and x-ray imaging diagnostics in the STELLOPT code. The reconstructed equilibria and profiles served as inputs for BEAMS3D calculations of neutral beam deposition in W7-X. It is found that if reconstructed kinetic profiles are utilized, good agreement between measured and simulated beam attenuation is found. As deposition models provide initial conditions for fast-ion slowing down calculations, this work provides a first step towards validating our ability to predict fast ion confinement in stellarators.

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Type
research article
DOI
10.1088/1741-4326/ab8e61
Web of Science ID

WOS:000543259800001

Author(s)
Lazerson, Samuel A.
•
Ford, Oliver P.
•
Nuehrenberg, Carolin
•
Aekaeslompolo, Simppa
•
Poloskei, Peter Zs
•
Machielsen, Mike  
•
McNeely, Paul
•
Vano, Lilla
•
Rust, Norbert
•
Bozhenkov, Sergey
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Date Issued

2020-07-01

Publisher

IOP Publishing Ltd

Published in
Nuclear Fusion
Volume

60

Issue

7

Article Number

076020

Subjects

Physics, Fluids & Plasmas

•

Physics

•

stellarator

•

neutral beam

•

simulation

•

fast ions

•

magnetic confinement

•

validation

•

beams3d

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
July 10, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/169984
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