Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session UI01: Magnetic Confinement Fusion VI
2:00 PM–5:00 PM,
Thursday, October 20, 2022
Room: Ballroom 100 A
Chair: Sebastian De Pascuale, Oak Ridge National Lab
Abstract: UI01.00006 : Separating Convective and Diffusive Main Ion Particle Transport in the Tokamak Pedestal with Experimental Ionization Source Measurements*
4:30 PM–5:00 PM
Presenter:
Aaron M Rosenthal
(Massachusetts Institute of Technology MI)
Authors:
Aaron M Rosenthal
(Massachusetts Institute of Technology MI)
Jerry W Hughes
(MIT PSFC)
Florian M. Laggner
(Princeton Plasma Physics Laboratory)
Tomas Odstrcil
(General Atomics - San Diego)
Alessandro Bortolon
(Princeton Plasma Physics Laboratory)
Theresa M Wilks
(MIT)
Francesco Sciortino
(4. Max-Plank-Institut für Plasmaphysik)
Shaun R Haskey
(Princeton Plasma Physics Laboratory)
Prediction capabilities remain limited for the tokamak edge density profile due to small spatial scales, complex plasma transport and non-negligible effects of neutral particles. Millisecond time resolution of the deuterium ionization source and neutral density from absolutely calibrated Lyman-alpha brightness measurements, allow direct quantitative comparison to the edge density profile. Coupled to advances in inference techniques from the Aurora code, a flux surface average particle transport and radiation forward model, diffusion and convection profiles in the steep density gradient can be calculated. Main ion transport profiles and experimental neutral particle measurements allow quantitative evaluation of the processes forming the density pedestal and constrain modern 2D edge codes, benchmarking their modeling of current devices, thereby, improving their predictive capabilities for future burning plasma devices.
*Work supported by US DOE under DE-FC02-04ER54698, DEAC02-09CH11466 and DE-SC0014264
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