講座題目：Development of TRIMEG code, Full-f and delta-f electromagnetic gyrokinetic particle simulations in tokamaks

講座時間：2023年11月14日14:00

講座地點：騰訊會議：647-421-969

主 講 人 ：盧志鑫

主講人簡介：盧志鑫，德國馬克斯普朗克等離子體物理研究所, Staff Scientist。于2008、2013年獲北京大學學士、博士學位。加州大學圣迭戈分校(UCSD)博士后（與普林斯頓等離子體物理實驗室(PPPL)聯合）。2016年在德國馬克斯-普朗克等離子體物理研究所從事博士后并于2019年成為Staff Scientist。自2012年以來發表文章33篇（一作或通訊18篇），參與歐洲EuroFusion enabling項目NLED, MET（快粒子物理相關），以及模擬與理論項目TSVV8（磁流體瞬變集成模型），TSVV10（快粒子與阿爾芬波動理學模擬）等。為TRIMEG/GKX代碼開發者、負責人。與慕尼黑工大、中國科學技術大學等合作指導學生3人。

講座內容簡介：

TRIMEG code has been developed in recent years, adopting triangular meshes, finite element method, gyrokinetic electromagnetic model with kinetic electrons. The full f gyrokinetic simulations have attracted intensive efforts recently due to its applications to transport studies and edge physics. We implemented the mixed variables and pullback scheme regarding Alfvén waves and energetic particle (EP) physics. The δf and full f schemes are formulated, enabling the simulations with a small electron skin depth. Good agreement with previous work is obtained. Simulations with mixed full f EPs and δf background species demonstrate the good features in reducing the noise. In full f model, constants of motion are implemented proper description of EPs. The full f scheme is a natural choice for EP physics studies, allowing large variations of EP profiles and distributions in velocity space, providing a powerful tool for studies of intermittent and transient plasma activities.