时间：2026年5月19日（周二）11:00

地点：紫金港校区海纳苑8幢322教室

报告题目：Introduction to multi-scale interaction in magnetic fusion plasmas with magnetic island

报告人：Gyungjin Choi教授

摘要： 

In magnetic fusion community, growing attention has been paid to multi-scale interactions among macro-scale magnetic islands, meso-scale self-generated flows, and micro-scale turbulence. Especially, recent achievements in J-TEXT, HL-3 and KSTAR have revealed that it is not only useful in stellarator but also in tokamaks, which opens a possibility of using large magnetic island which threats tokamak operation to further enhance the tokamak performance. In this talk, we present an introduction to this multi-scale interactions with magnetic island, starting from the very basics of tearing mode and microturbulence. Later part will be focused on various theoretical mechanisms of mesoscale shear flow dynamics, which plays crucial roles in suppression of turbulent transport and thus leads to positive effects of magnetic island to fusion plasma perfromance.

个人简介：
Gyungjin Choi is a researcher in the Department of Physics and Astronomy at the University of California, Irvine, specializing in tokamak transport, plasma turbulence, shear flows, Alfvén eigenmodes, and kinetic simulations. He earned his Ph.D. in plasma physics and fusion engineering from Seoul National University under the supervision of Taik Soo Hahm, and previously conducted research as a postdoctoral researcher at Seoul National University and participated in experimental and simulation studies on the KSTAR device at the Korea Fusion Energy Institute (KFE). He has published a series of high-quality papers in leading journals including Physical Review Letters, Nuclear Fusion, and Physics of Plasmas, with research focusing on geodesic acoustic modes, fast ion effects on zonal flows, vortex flow evolution around magnetic islands, and profile structures within islands, and has long maintained academic collaborations with institutions such as the Princeton Plasma Physics Laboratory (PPPL), KFE, and KAIST while actively contributing to international fusion conferences.

欢迎各位老师和同学参加！