学术交流
学术报告
报告题目：Flux Pumping in ASDEX Upgrade, JET and JOREK
时 间：2026年10月21日（星期三） 10:00-11:00
地 点：8-2楼224会议室
报 告 人：Alexander Bock
主 持 人：简翔
报告内容简介：
Viable tokamak fusion power plant scenarios must exhibit high energy confinement and magnetohydrodynamic (MHD) stability. To this end, the anomalous redistribution of magnetic flux caused by a central continuous self-regulating saturated MHD mode ("flux pumping") can be of great benefit: it clamps the central safety factor
to 1, i.e. limits the core magnetic field line helicity, thereby preventing the occurrence of periodic reconnection events known as sawtooth crashes which can take place whenever
< 1. This not only avoids the performance-degrading crashes, but can also prevent secondary resistive instabilities and their potentially disastrous consequences. Ultimately, flux pumping can result in a peaked plasma current profile just shy of sawteeth, giving additional stability against ideal MHD instabilities.This presentation will show recent experimental evidence of flux pumping from the ASDEX Upgrade and JET tokamaks, including initial modelling results.
报告人简介：
Dr. Alexander Bock is a physicist and fusion-plasma researcher at the German Max-Planck-Institute for Plasma Physics in Garching near Munich.
He graduated from the Technical University Munich in 2012 and received his PhD from the Ludwig Maximilians University in 2016. Since 2025, he leads the core physics group of the Plasma Dynamics department of Prof. Dr. Tim Happel, where his research focuses on the confinement and stability properties of high performance plasmas, in particular in hybrid and advanced scenarios.
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