Examination of stiff ion temperature gradient mode physics in simulations of DIII-D H-mode transport

Holland, Christopher; Luce, Timothy C.; Grierson, Brian A.; Smith, Sterling P.; Marinoni, Alessandro; Burrell, Keith H.; Petty, Craig; Bass, Eric

doi:10.1088/1741-4326/abf951

Examination of stiff ion temperature gradient mode physics in simulations of DIII-D H-mode transport

Journal Article · Fri May 21 00:00:00 EDT 2021 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/abf951· OSTI ID:1779308

^[1]; Luce, Timothy C. ^[2]; ^[3]; Smith, Sterling P. ^[4]; Marinoni, Alessandro ^[5]; Burrell, Keith H. ^[4]; ^[4]; Bass, Eric ^[6]

Univ. of California San Diego, La Jolla, CA (United States); University of California, San Diego
ITER, Provence-Alpes-Côte d'Azu (France)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. of California San Diego, La Jolla, CA (United States)

This paper presents comparisons of predictions from two models of turbulent transport in tokamaks. The focus is on assessing how close a reduced but significantly less computationally demanding model (TGLF) does in matching the more detailed model (CGYRO) in predicting scalings with driving gradient ("stiffness"). The impacts of other physics mechanisms such as flow shear, fast ions, and electromagnetic fluctuations on these predictions is also studied. Overall, while there are clear differences in the scaling, these do not appear to significantly impact the fidelity of the reduced model in prediction the experimental conditions studied relative to the more advanced model.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0018287

OSTI ID:: 1779308

Alternate ID(s):: OSTI ID: 23129770

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 6 Vol. 61; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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