Hysteresis Relation between Turbulence and Temperature Modulation during the Heat Pulse Propagation into a Magnetic Island in DIII-D

K. Ida, T. Kobayashi, M. Ono, T. E. Evans, G. R. McKee, and M. E. Austin

Phys. Rev. Lett. 120, 245001 – Published 12 June 2018

Abstract

The hysteresis relation between turbulence and temperature modulation during the heat pulse propagation into a magnetic island is studied for the first time in toroidal plasmas. Lissajous curves of the density fluctuation ( $\tilde{n} / n$ ) and the electron temperature ( $T_{e}$ ) modulation show that the ( $\tilde{n} / n$ ) propagation is faster than the heat pulse propagation near the $O$ point of the magnetic island. This faster $\tilde{n} / n$ propagation is experimental evidence of the turbulence spreading from the $X$ point to the $O$ point of the magnetic island.

Received 8 February 2018
Revised 10 April 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.245001

Physics Subject Headings (PhySH)

Magnetic confinement fusion Magnetic reconnection Plasma turbulence

Plasma Physics

Authors & Affiliations

K. Ida^1,2, T. Kobayashi^1,2, M. Ono³, T. E. Evans⁴, G. R. McKee⁵, and M. E. Austin⁶

¹National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Gifu 509-5292, Japan
²SOKENDAI (The Graduate University for Advanced Studies), Toki, Gifu 509-5292, Japan
³National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaragi 311-0193, Japan
⁴General Atomics, San Diego, California 92186-5608, USA
⁵University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
⁶University of Texas, Austin, Texas 78712, USA