Turbulent field fluctuations in gyrokinetic and fluid plasmas

Mathews, A.; Mandell, N.; Francisquez, M.; Hughes, J. W.; Hakim, A.

doi:10.1063/5.0066064

Turbulent field fluctuations in gyrokinetic and fluid plasmas

Journal Article · Mon Nov 01 00:00:00 EDT 2021 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0066064· OSTI ID:2567780

; Mandell, N.; ; ; Hakim, A.

A key uncertainty in the design and development of magnetic confinement fusion energy reactors is predicting edge plasma turbulence. An essential step in overcoming this uncertainty is the validation in accuracy of reduced turbulent transport models. Drift-reduced Braginskii two-fluid theory is one such set of reduced equations that has for decades simulated boundary plasmas in experiment, but significant questions exist regarding its predictive ability. To this end, using a novel physics-informed deep learning framework, we demonstrate the first ever direct quantitative comparisons of turbulent field fluctuations between electrostatic two-fluid theory and electromagnetic gyrokinetic modeling with good overall agreement found in magnetized helical plasmas at low normalized pressure. This framework presents a new technique for the numerical validation and discovery of reduced global plasma turbulence models.

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Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: SC0014264; AR0001263; SC0014664; AC02-09CH11466

OSTI ID:: 2567780

Alternate ID(s):: OSTI ID: 1828431
OSTI ID: 1828492

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 28; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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