From minimum-viable-products to full models: a step-wise development of diagnostic forward models in support of design, analysis and modelling on the ST40 tokamak

Sertoli, Marco; Alieva, A.; Buxton, P. F.; Dnestrovskii, A.; Gemmell, M.; Lowe, H.; O’Gorman, T.; Osin, D.; Sladkomedova, A.; Varje, J.; Willett, H. V.; Wood, J.; Lomanowski, Bart A.; Delabie, Ephrem G.; Marchuk, O.; Litherland-Smith, E.; Collie, K.; Gadgil, S.

doi:10.1088/1361-6587/ad668f

Title: From minimum-viable-products to full models: a step-wise development of diagnostic forward models in support of design, analysis and modelling on the ST40 tokamak

Journal Article · Fri Aug 02 00:00:00 UTC 2024 · Plasma Physics and Controlled Fusion

DOI: https://doi.org/10.1088/1361-6587/ad668f · OSTI ID:2438744

^[1];

^[1]; Dnestrovskii, A. ^[1]; Gemmell, M. ^[1];

^[1]; O’Gorman, T. ^[1]; Osin, D. ^[1]; Sladkomedova, A. ^[1]; Varje, J. ^[1];

^[1]; Wood, J. ^[1];

^[2];

^[3]; Litherland-Smith, E. ^[4]; Collie, K. ^[4]; Gadgil, S. ^[4]

Tokamak Energy Ltd. (United Kingdom)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Forschungszentrum Juelich (Germany)
UK Atomic Energy Authority (UKAEA), Culham (United Kingdom)

Like most magnetic confined fusion experiments, the ST40 tokamak started off with a small subset of diagnostics and gradually increased the diagnostic set to include more complex and comprehensive systems. To make the most of each operational phase, forward models of various diagnostics are used and developed to aid design, provide consistency-checks during commissioning, test analysis methods, and build workflows to constrain high-level parameters to inform interpretation, theory and modelling. For new models and new analysis workflows, minimum-viable-products are released early, and their complexity is increased in a step-wise manner, facilitating the support of all programme phases on multiple parallel applications, while enabling learning opportunities and feedback loops. In this contribution we review the philosophy, scope and architecture of the framework under development. We discuss the details of some forward models, with examples on how they are used to aid diagnostic design, to investigate analysis methodologies through synthetic data, and how they are embedded in experimental analysis workflows. We compare previously published experimental results with new, more advanced analysis workflows employing more recent, detailed models and new diagnostic data, providing confirmation of the published material from the 2021–22 experimental campaign.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: Tokamak Energy Team

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2438744

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 9 Vol. 66; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Title: From minimum-viable-products to full models: a step-wise development of diagnostic forward models in support of design, analysis and modelling on the ST40 tokamak

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