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Abstract <p>Plasma vortices significantly influence stability and confinement in tokamak devices. This study investigates the intricate interplay between vortices and blobs, coherent density structures, using a Mix-Probe system on the IR-T1 tokamak. By measuring ion saturation current fluctuations, vortex frequencies, radial and poloidal velocity fluctuations, and temperature fluctuations, we explore the temporal dynamics of these phenomena. Results indicate a strong negative correlation between vortex fluctuations and radial velocity, suggesting that increasing plasma rotation suppresses certain instabilities. Additionally, poloidal velocity fluctuations exhibit a positive correlation with vortex fluctuations, further emphasizing the impact of vortices on plasma dynamics. These findings provide valuable insights into the mechanisms underlying turbulent transport and plasma confinement in tokamak devices.</p>

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Exploring Vortex–Velocity–Density Interactions in IR-T1 Tokamak EDGE Plasma Using Mix-Probe Techniques

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • M. Lafouti,
  • M. Mahjour,
  • M. Ghoranneviss,
  • M. K. Salem

摘要

Abstract

Plasma vortices significantly influence stability and confinement in tokamak devices. This study investigates the intricate interplay between vortices and blobs, coherent density structures, using a Mix-Probe system on the IR-T1 tokamak. By measuring ion saturation current fluctuations, vortex frequencies, radial and poloidal velocity fluctuations, and temperature fluctuations, we explore the temporal dynamics of these phenomena. Results indicate a strong negative correlation between vortex fluctuations and radial velocity, suggesting that increasing plasma rotation suppresses certain instabilities. Additionally, poloidal velocity fluctuations exhibit a positive correlation with vortex fluctuations, further emphasizing the impact of vortices on plasma dynamics. These findings provide valuable insights into the mechanisms underlying turbulent transport and plasma confinement in tokamak devices.