报告人：Alessandro Marinoni 

报告时间：2024年7月31日，下午两点 

报告地点：六室办公楼三楼301 

主持人：徐国梁 

报告人简介：Alessandro Marinoni is on the faculty of the Department of Mechanical and Aerospace Engineering at the UC San Diego Jacobs School of Engineering. Previously, Marinoni was a Research Scientist at Massachusetts Institute of Technology and a Visiting Research Scientist at General Atomics. His research focuses on understanding plasma turbulence and ways to control it. This involves developing innovative diagnostic systems for nuclear fusion devices, designing experiments within them, and using advanced modeling tools for data analysis. Marinoni is also recognized as a pioneer of negative triangularity plasma operation on Tokamaks and has achieved significant advancements in this research field. 

报告摘要：The successful operation of future fusion reactors requires the simultaneous solution of conflicting requirements from the plasma core and edge which, respectively, must maximize the fusion power and dissipate most of its exhaust to protect plasma facing components. In contrast to standard H-mode configurations, which achieve the core pressure levels necessary for fusion reactions to occur by employing an edge transport barrier, plasmas with a cross sectional shape featuring Negative Triangularity can sustain such conditions while maintaining relaxed edge pressure profiles typical of L-mode plasmas that do not generate Edge Localized Modes (ELMs). In addition to providing a passive safety mechanism against ELMs, the absence of the edge pedestal is beneficial in possibly enabling operation using a core radiative mantle, with the caveat that main ion core dilution must be minimal. The intensity of fluctuations near the edge is believed to widen the heat flux profile in the scrape off layer which, in Negative Triangularity L-mode edge plasmas, is observed to be at intermediate levels between those typically observed in L- and H-mode plasmas in standard scenarios at positive triangularity. Detachment accessibility, control and its compatibility with high core confinement remains to be demonstrated. While detachment onset, or deeply detached conditions, have been obtained, they are generally accompanied by some degree of confinement degradation.