Abstract Details
Abstracts
Author: Orso Meneghini
Requested Type: Poster
Submitted: 2026-03-24 15:10:45
Co-authors: O. Meneghini, D. Boeckenhoff, J. Freigang, O. Hoenen, S. Kwak, J. Lion, S. Pinches, R. Ramasamy, F. Wilms
Contact Info:
Proxima Fusion
Toelzer Strasse 5
Munich, 82379
Germany
Abstract Text:
The ITER Integrated Modeling & Analysis Suite (IMAS) has been transformative for the tokamak community: its standardized, machine-generic data model solved the N-squared code-coupling problem, enabled modular integrated modeling workflows, and established a shared language for verification and validation across devices worldwide [Imbeaux et al., Nucl. Fusion 55 (2015) 123006]. The stellarator community, by contrast, lacks such a unifying data standard, resulting in fragmented tooling, limited code interoperability, and higher barriers to systematic integrated modeling.
The authors propose extending IMAS to accommodate stellarator-specific physics with minimal additions to the existing schema. The IMAS data model is already largely stellarator-ready: flux-surface-averaged transport quantities, actuator descriptions, and diagnostic structures are inherently compatible with three-dimensional configurations. The required extensions are concentrated in a small number of new or augmented Interface Data Structures (IDSs), such as a 3D equilibrium IDS capturing non-axisymmetric geometry, a non-axisymmetric coil extension with B-spline conductor descriptions, and a new 3D radial build IDS for engineering structures. Transport, source, and diagnostics remain unchanged.
This extended data model, currently under review with the Max Planck Institute for Plasma Physics and ITER, will enable scalable integrated modeling workflows, systematic verification against existing codes, and validation against experimental data, while lowering the barrier of entry for the tokamak modeling community to contribute to stellarator research. Our aim is to establish a community standard that accelerates the stellarator path to fusion energy.
Characterization: 5.0
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