NIMROD modeling of quiescent H-mode: Reconstruction considerations and saturation mechanism
Abstract
The extended-MHD NIMROD code (Sovinec and King 2010 J. Comput. Phys. 229 5803) models broadband-MHD activity from a reconstruction of a quiescent H-mode shot on the DIII-D tokamak (Luxon 2002 Nucl. Fusion 42 614). Computations with the reconstructed toroidal and poloidal ion flows exhibit low-nΦ perturbations (nΦ ≃1–5) that grow and saturate into a turbulent-like MHD state. The workflow used to project the reconstructed state onto the NIMROD basis functions re-solves the Grad–Shafranov equation and extrapolates profiles to include scrape-off-layer currents. In conclusion, evaluation of the transport from the turbulent-like MHD state leads to a relaxation of the density and temperature profiles.
- Authors:
-
- Tech-X Corp., Boulder, CO (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Tech-X Corp., Boulder, CO (United States); General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1327325
- Grant/Contract Number:
- FC02-06ER54875; FC02-04ER54698
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 2; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
King, Jacob R., Burrell, Keith H., Garofalo, Andrea M., Groebner, Richard J., Kruger, S. E., Pankin, Alexei Y., and Snyder, Philip B. NIMROD modeling of quiescent H-mode: Reconstruction considerations and saturation mechanism. United States: N. p., 2016.
Web. doi:10.1088/0029-5515/57/2/022002.
King, Jacob R., Burrell, Keith H., Garofalo, Andrea M., Groebner, Richard J., Kruger, S. E., Pankin, Alexei Y., & Snyder, Philip B. NIMROD modeling of quiescent H-mode: Reconstruction considerations and saturation mechanism. United States. https://doi.org/10.1088/0029-5515/57/2/022002
King, Jacob R., Burrell, Keith H., Garofalo, Andrea M., Groebner, Richard J., Kruger, S. E., Pankin, Alexei Y., and Snyder, Philip B. 2016.
"NIMROD modeling of quiescent H-mode: Reconstruction considerations and saturation mechanism". United States. https://doi.org/10.1088/0029-5515/57/2/022002. https://www.osti.gov/servlets/purl/1327325.
@article{osti_1327325,
title = {NIMROD modeling of quiescent H-mode: Reconstruction considerations and saturation mechanism},
author = {King, Jacob R. and Burrell, Keith H. and Garofalo, Andrea M. and Groebner, Richard J. and Kruger, S. E. and Pankin, Alexei Y. and Snyder, Philip B.},
abstractNote = {The extended-MHD NIMROD code (Sovinec and King 2010 J. Comput. Phys. 229 5803) models broadband-MHD activity from a reconstruction of a quiescent H-mode shot on the DIII-D tokamak (Luxon 2002 Nucl. Fusion 42 614). Computations with the reconstructed toroidal and poloidal ion flows exhibit low-nΦ perturbations (nΦ ≃1–5) that grow and saturate into a turbulent-like MHD state. The workflow used to project the reconstructed state onto the NIMROD basis functions re-solves the Grad–Shafranov equation and extrapolates profiles to include scrape-off-layer currents. In conclusion, evaluation of the transport from the turbulent-like MHD state leads to a relaxation of the density and temperature profiles.},
doi = {10.1088/0029-5515/57/2/022002},
url = {https://www.osti.gov/biblio/1327325},
journal = {Nuclear Fusion},
issn = {0029-5515},
number = 2,
volume = 57,
place = {United States},
year = {Fri Sep 30 00:00:00 EDT 2016},
month = {Fri Sep 30 00:00:00 EDT 2016}
}
Web of Science
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