学术交流
学术报告
报告时间：3月20日（周四）上午9：00-11：00
报告地点：8-1控制大厅三楼会议室
报告人：Hiroyuki Yamaguchi、Akihiro Shimizu
主持人：徐国盛
报告一：Design activity of QA/QI flexible stellarator at NIFS
报告人：Hiroyuki Yamaguchi
报告内容简介：As a candidate for the post-Large Helical Device at National Institute for Fusion Science (NIFS), Japan, our research group has been designing a new stellarator-type experiment device. To study the effect of particle motion on the collective phenomena in plasma, such as micro-turbulences, magnetic flexibility is emphasized in designing: both quasi-axisymmetric (QA) and quasi-isodynamic (QI)-like magnetic configurations can be realized in a single device. With the basic design for modular and auxiliary coils being almost fixed, the physics design has made substantial progress in the last year. Both QA and QI-like modes have been confirmed to have finite-beta MHD equilibria with good magnetic surfaces. Gyrokinetic simulations have shown clear differences in ion-temperature-gradient driven turbulence and associated zonal flows between these configurations. Recent attempts to predict plasma performances and heating scenarios by integrated simulation will also be presented.
报告人简介：Hiroyuki Yamaguchi, Associate Professor in NIFS. Professional of stellarator optimization, neoclassical transport, and high energy particle confinement. He developed the stellarator optimization code, OPTHECS together with the coil shape optimization code, GOSPEL.
报告二：Physics/engineering design, and construction of quasi-axisymmetric stellarator CFQS-T
报告人：Akihiro Shimizu
报告内容简介：CFQS is the first experiment device of quasi-axisymmetric stellarator (QAS) in the world. It has been developed as a joint project of National Institute for Fusion Science, Japan and Southwest Jiaotong University, China. Purpose of CFQS is a proof-of-principle experiment to prove effect of QAS on confinement. CFQS project is performed as two steps, 1st phase: CFQS-T for 0.1 T operation, and 2nd phase: CFQS for 1 T operation. Construction of CFQS-T was completed successfully in July, 2024, and 1st phase of experimental campaign started. Mapping magnetic field experiment was performed, and good magnetic surfaces were experimentally obtained with sufficient accuracy. In this presentation, physics/engineering design of machine, construction, and recent experiment results.
报告人简介：Akihiro Shimizu, Assistant Professor in NIFS. Professional of stellarator optimization, plasma diagnostics, heavy ion beam probe. He is working on heavy ion beam probe system in LHD. And, he performed the design study of modular coils in CHS-qa, and also in CFQS. Now, he is working in CFQS project collaboratively with Southwest Jiaotong University.
