8月30日 Recent advances in gamma-ray measurements for alpha particle studies and fusion power determination in tokamaks

　　报告题目：Recent advances in gamma-ray measurements for alpha particle studies and fusion power determination in tokamaks

　　报告人：Prof. Massimo Nocente

　　主持人：钟国强

　　报告时间：8月30日 14:30~15:30

　　报告地点：4号楼-五楼中间会议室

　　报告人简介：M. Nocente is associate professor of department of Physics at University of Milano-Bicocca. His research activity is in the field of experimental studies of energetic particles in major tokamaks, such as neutron and gamma-ray spectroscopy. The work so far has included activities in major tokamaks in Europe (JET and ASDEX-Upgrade), China (EAST) and the USA (DIII-D). Since June 2016 and October 2017 MN is part of the group of international experts of the International Tokamak Physics Activity (ITPA) on Energetic Particle Physics and Diagnostics for the ITER tokamak, respectively. Since January 2022, MN has been selected as European Member in the ITPA group on Energetic Particle Physics. The research activity of MN is documented by more than 200 publications and his H index is 40.

　　报告内容：Recent advances in the application of gamma-ray spectroscopy to measure fusion born alpha particles and to determine the fusion power from deuterium-tritium plasmas of JET with a beryllium wall are illustrated. In deuterium plasmas with 3He, gamma-ray measurements confirm the effective generation of MeV range deuterons and alpha particles by the application of a three-ion radio-frequency heating scheme, which was originally developed to test alpha particle diagnostics in preparation for deuterium-tritium operations. In deuterium-tritium plasmas, direct spectral measurements of high energy gamma-rays born from deuterium-tritium fusion reactions were made for the first time in tokamaks. Gamma-ray spectroscopy measurements of confined alpha particles were also attempted. Starting from these results, an outlook towards the application of this diagnostic technique for alpha particle studies and fusion power measurements in machines with a reactor relevant tungsten wall is finally given.