SOLPS analysis of the necessary conditions for detachment cliff

Hailong Du (Corresponding Author), Guoyao Zheng, Houyang Guo (Corresponding Author), Aaro E. Jaervinen, Xuru Duan, Xavier Bonnin, David Eldon, Dezhen Wang

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


SOLPS modeling including full cross-filed drifts is used, for the first time, to reproduce the step-like detachment onset observed in the DIII-D tokamak previously simulated with UEDGE (Jaervinen et al 2018 Phys. Rev. Lett. 121 075001), and to further investigate the underlying physics processes. The SOLPS analysis reveals a strong interplay between the E × B drift-driven flows and carbon radiation in DIII-D. The modeling shows that the high confinement H-mode facilitates the formation of such a detachment cliff due to the narrow SOL width and hence steep radial gradients near the separatrix, which enhances the poloidal E × B drift. Furthermore, the SOLPS modeling indicates that carbon radiation also plays a key role in the formation of the detachment cliff in DIII-D without additional impurity seeding. These findings may have significant implications for the control and maintenance of divertor detachment for the steady-state operation of high power fusion devices.

Original languageEnglish
Article number046028
JournalNuclear Fusion
Issue number4
Publication statusPublished - 2020
MoE publication typeA1 Journal article-refereed


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