Validation of the BEAMS3D neutral beam deposition model on Wendelstein 7-X
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-07
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en
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21
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Nuclear Fusion, Volume 60, issue 7
Abstract
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.Description
| openaire: EC/H2020/633053/EU//EUROfusion
Keywords
BEAMS3D, fast ions, magnetic confnement, neutral beam, simulation, Stellarator, validation
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Lazerson, S A, Ford, O P, Nuehrenberg, C, Akaslompolo, S, Poloskei, P Z, MacHielsen, M, McNeely, P, Vanó, L, Rust, N, Bozhenkov, S, Neelis, T W C, Graves, J P, Pfefferlé, D, Spanier, A, Hartmann, D, Marushchenko, N, Turkin, Y, Hirsch, M, Chaudhary, N, Hoefel, U, Stange, T, Weir, G, Pablant, N, Langenberg, A, Traverso, P, Valson, P, Knauer, J, Jakob Brunner, K, Pasch, E, Beurskens, M, Damm, H, Fuchert, G, Nelde, P, Scott, E, Scott, E, Hergenhahn, U, Pavone, A, Rahbarnia, K, Andreeva, T, Schilling, J, Brandt, C, Neuner, U, Thomsen, H, Jakubowski, M, Ali, A, Gao, Y, Niemann, H, Puig Sitjes, A, Koenig, R & Wolf, R C 2020, ' Validation of the BEAMS3D neutral beam deposition model on Wendelstein 7-X ', Nuclear Fusion, vol. 60, no. 7, 076020 . https://doi.org/10.1088/1741-4326/ab8e61