Local transport dynamics of cold pulses in tokamak plasmas

Abstract

For over two decades, our fundamental understanding of energy transport dynamics in the core of tokamak plasmas had been challenged by the striking observation of temperature perturbation reversals following the injection of cold pulses at the plasma edge. These phenomena were first discovered by Gentle et al. (Phys. Rev. Lett. 74(18):3620–3623, 1995) in 1995 and had long been suggested to be evidence of nonlocal transport effects. In recent years, a new explanation to these phenomena has emerged, fully consistent with the theory of turbulent transport in magnetized plasmas and in remarkable agreement with experiment. This article reviews the experimental observation of temperature reversals in tokamak plasmas and presents the explanation based on local transport physics.

Editorial : Reviews of Modern Plasma Physics: Volume 6

“…There are number of invited papers from AAPPS-DPP2020 talks, (Shen et al 2022;Rodriguez-Fernandez et al 2022;Bhattacharjee et al 2022;Shin et al 2022;Czarnetzki and Alves 2022;Lee 2022) and from AAPPS-DPP2021 talk ).…”

“…An invite paper (Ida 2022) is for comparison with Rodriguez-Fernandez et al (2022). Three more papers are published in the field of Applied (Zafar and Jacob 2022), Magnetic Fusion (Bilal et al 2022), and Space (Das et al 2022).…”