普林斯顿大学访问学者学术报告

活动信息

  • 开始时间:网上投稿
  • 活动地点:multiple mode, plasma response
  • 主讲人:刘桐

活动简介

报告人简介:王智睿,2006年,2008年于大连理工应用数学系分别获学士和硕士学位。2009年-2012年,在Padova University和意大利科学院下属国家实验室Consorzio RFX,针对磁约束核聚变装置Reversed Field Pinch中磁流体不稳定性开展博士研究。2013年-2015年,在美国能源部下属普林斯顿大学等离子体物理国家实验室,围绕磁约束核聚变中tokamak位型的相关磁流体物理开展博士后研究,并于2015年成为普林斯顿大学staff research physicist (tenure track)。曾多次在国际会议,如美国物理年会,亚太物理年会,做邀请报告。并在Physical Review Letters, Nuclear Fusion, Physics of Plasmas等国际高档次期刊上发表学术论文30余篇。

 

报告摘要:A multi-mode plasma response model, extended by including rotating three-dimension (3D) field perturbations, has been developed, which provides significant insight into the damping rates and spatial structures of magnetohydrodynamic (MHD) modes in stable fusion plasmas. The enhanced model is validated with dedicated experiments in DIII-D and EAST tokamaks, where, for the first time, the comprehensive capabilities of 3D actuators (magnetic coils) and sensors allow high-fidelity construction of multi-pole plasma transfer functions for stable plasmas, based on simultaneous scans of both the frequency and spatial structure of the applied 3D field. Comparison of MARS-F n=1 multi-mode response modeling with the extracted multiple eigenmodes in DIII-D experiments indicates the importance of the conducting wall for AC response of the plasma. Based on measured data, the reconstruction of multi-mode plasma response model, for the n=2 plasma response experiments in DIII-D L-mode plasmas, appears to reveal the least stable mode can be stable tearing mode and responsible for n=2 mode locking in the experiment. These encouraging results thus demonstrate that this enhancement of the MHD spectroscopy approach not only helps to improve the physics understanding of general stable eigenmodes, but can also offer great potential for understanding and controlling of, e.g. edge localized modes by resonant magnetic perturbations, or for real-time monitoring of the plasma stability, with the latter serving as a key part of an integrated approach for disruption prediction and avoidance in future reactors such as ITER.

主讲人介绍

报告人简介:王智睿,2006年,2008年于大连理工应用数学系分别获学士和硕士学位。2009年-2012年,在Padova University和意大利科学院下属国家实验室Consorzio RFX,针对磁约束核聚变装置Reversed Field Pinch中磁流体不稳定性开展博士研究。2013年-2015年,在美国能源部下属普林斯顿大学等离子体物理国家实验室,围绕磁约束核聚变中tokamak位型的相关磁流体物理开展博士后研究,并于2015年成为普林斯顿大学staff research phy...