Shock formation induced by poloidal flow and its effects on the edge stability in tokamaks

J. Seol, Ker-Chung Shaing, A. Y. Aydemir

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In the high confinement mode of tokamaks, magnitude of the radial electric field increases at the edge. Thus, the poloidal flow inside the transport barrier can be sonic when the edge pressure gradient is not steep enough to make the poloidal flow subsonic. When the poloidal Mach number is close to unity, a shock appears in the low field side and causes a large density perturbation. In this study, we describe a shock induced by the sonic poloidal plasma flow. Then, an entropy production across the shock is calculated. Finally, we introduce a simple model for Type III edge localized modes using the poloidal density variation driven by the sonic poloidal flow.

Original languageEnglish
Article number042501
JournalPhysics of Plasmas
Volume23
Issue number4
DOIs
Publication statusPublished - 2016 Apr 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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