Possible break-down of up-down symmetry for propagation of parallel velocity gradient driven mode near edge transport barrier

Yusuke Kosuga, Kimitaka Itoh, Sanae I. Itoh

Research output: Contribution to journalArticlepeer-review

Abstract

The propagation direction of parallel velocity gradient driven mode in the edge of H-mode plasmas is investigated. We study the possibility to observe a preferential propagation (either up-ward or down-ward) direction, simultaneously in the low-field as well as high-field sides of torus. The condition to observe such an up-down preferential propagation is derived. The proximity of the barrier to the separatrix is found to be the key for such preferential propagations. This result provides a hypothesis, which will be tested by future experiments, and a step forward to understand the broken up-down symmetry in the H-mode plasmas.

Original languageEnglish
Article number074501
Journaljournal of the physical society of japan
Volume89
Issue number7
DOIs
Publication statusPublished - Jul 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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