Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session PP11: Poster Session VI: Relativistic Laser Plasma Interaction and Beam Physics; Boundary; MHD and Stability, Transients; FRC; Dusty Plasmas; Basic Studies; Computational and Diagnostic Methods (2:00pm-5:00pm)
Wednesday, November 7, 2018
OCC
Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.PP11.34
Abstract: PP11.00034 : Scrape-off layer turbulence and transport in the wide divertor heat-flux width simulations of ITER*
Presenter:
Randy M Churchill
(Princeton Plasma Phys Lab)
Authors:
Randy M Churchill
(Princeton Plasma Phys Lab)
C-S Seock Chang
(Princeton Plasma Phys Lab)
Seung Hoe Ku
(Princeton Plasma Phys Lab)
Robert Hager
(Princeton Plasma Physics Laboratory)
Recent simulations [1] with the gyrokinetic turbulence code XGC1 have predicted that the midplane-projected heat-flux width on full-field ITER will be much wider (~6mm) than the expected value from a multi-machine experimental scaling (<1mm) [2]. This result would greatly open the operational space of ITER, and as such a more fundamental understanding is warranted in to why the simulation departs from the experimental scaling. Heuristic scaling arguments suggest that the main reason for the difference is that in the full-field ITER the nonlinear edge turbulence plays a more dominant role in setting the heat-flux width. This work will present a more detailed look at the turbulence characteristics of this ITER simulation in comparison with simulations on low-field ITER and devices such as C-Mod, to begin to understand the mechanisms at play. Beyond typical turbulence characteristics, a focus will be given to the turbulence along the entire scrape-off layer, including through the divertor region.
[1] C.S. Chang, et. al., Nucl. Fusion 57 (2017) 116023.
[2] T. Eich, et. al., Nucl. Fusion 53 (2013) 093031.
*This work is funded through the SciDAC program by the US Department of Energy, under contract No. DE-AC02-09CH11466 (PPPL), and used computing resources at OLCF.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.PP11.34
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