aalto1 untyped-item.component.html
Comparison of 2D simulations of detached divertor plasmas with divertor Thomson measurements in the DIII-D tokamak
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
Series
Nuclear Materials and Energy, Volume 12, pp. 44-50
Abstract
A modeling study is reported using new 2D data from DIII-D tokamak divertor plasmas and improved 2D transport model that includes large cross-field drifts for the numerically difficult low anomalous transport regime associated with the H-mode. The data set, which spans a range of plasma densities for both forward and reverse toroidal magnetic field (Bt ), is provided by divertor Thomson scattering (DTS). Measurements utilizing X-point sweeping give corresponding 2D profiles of electron temperature (Te ) and density (ne ) across both divertor legs for individual discharges. The simulations focus on the open magnetic field-line regions, though they also include a small region of closed field lines. The calculations show the same features of in/out divertor plasma asymmetries as measured in the experiment, with the normal Bt direction (ion ∇. B drift toward the X-point) having higher ne and lower Te in the inner divertor leg than outer. Corresponding emission data for total radiated power shows a strong inner-divertor/outer-divertor asymmetry that is reproduced by the simulations. These 2D UEDGE transport simulations are enabled for steep-gradient H-mode conditions by newly implemented algorithms to control isolated grid-scale irregularities.
Description
Keywords
Other note
Citation
Rognlien, T D, McLean, A G, Fenstermacher, M E, Groth, M, Jaervinen, A E, Joseph, I, Lasnier, C J, Meyer, W, Moser, A, Porter, G D & Umansky, M V 2017, 'Comparison of 2D simulations of detached divertor plasmas with divertor Thomson measurements in the DIII-D tokamak', Nuclear Materials and Energy, vol. 12, pp. 44-50. https://doi.org/10.1016/j.nme.2016.12.002