Generation of energetic electrons by an electron cyclotron wave through stochastic heating in a spherical tokamak

• DOI: 10.1017/s0022377823001216
• Publication Date: 2023-11-28T10:33:30Z
• Authors: Mingyuan Wang; Shikui Cheng; Bing Liu; Shaodong Song; Dong Guo; Yunyang Song; Wenjun Liu; Debabrata Banerjee; Songjian Li; Tiantian Sun; Xiang Gu; Yingying Li; Jiaqi Dong; Yuejiang Shi; Y.-K. Martin Peng; Adi Liu
• Keywords: 0103 physical sciences; 7. Clean energy; 01 natural sciences

This study presents novel findings on stochastic electron heating via a random cyclotron wave (ECW) in spherical tokamak. Hard x ray measurements demonstrate the time evolution of hard counts at different energy bands, consistent with predictions from model. The ECW rate shows positive correlation applied power, confirming effectiveness heating. Remarkably, ECW-driven plasma current remains insensitive to incidence angle, model predictions. observed electrons offers potential for exploring innovative non-inductive drive modes tokamaks. research contributes understanding behaviour and motivates development new models fusion devices.