A groundbreaking study from researchers at the University of Science and Technology of China and the Institute of Plasma Physics has unveiled a pivotal mechanism for controlling tungsten impurities in plasma, a crucial factor for the success of fusion reactors like ITER. The research, led by H. Sheng and published in ‘Nuclear Fusion’, reveals how resonant magnetic perturbations (RMPs) can simultaneously reduce both tungsten concentration and plasma rotation in the core region of the Experimental Advanced Superconducting Tokamak (EAST).
Tungsten, a material often used in fusion reactors due to its high melting point, poses challenges when it accumulates in plasma. The study identifies a positive feedback loop between tungsten and plasma rotation, where high levels of tungsten can lead to increased rotation, complicating efforts to manage impurities. “Our findings suggest that even in low-torque plasma, tungsten accumulation can occur before RMP application, creating a cycle that can hinder plasma performance,” explains Sheng.
The innovative aspect of this research lies in the ability of RMPs to brake edge rotation, effectively reversing the cycle. By doing so, researchers have demonstrated a significant reduction in both tungsten concentration and plasma rotation. This dual effect not only enhances plasma performance but also opens new avenues for maintaining optimal conditions in future fusion reactors.
The implications of this research extend beyond the laboratory, potentially influencing the commercial landscape of energy generation. As the world seeks sustainable and clean energy solutions, advancements in fusion technology become ever more critical. The ability to control tungsten and rotation effectively could lead to more efficient and reliable fusion reactors, paving the way for a new era of energy production.
“This research provides a new understanding of how RMPs can be utilized for tungsten and rotation control, which is vital for the development of future reactors,” Sheng states, emphasizing the importance of these findings for the energy sector.
As the journey toward practical fusion energy continues, this study serves as a significant milestone, showcasing how innovative approaches can address some of the most pressing challenges in the field. The work of Sheng and his team not only enhances scientific understanding but also lays the groundwork for commercial applications that could transform the energy landscape.
For more information about the research and its implications, visit lead_author_affiliation.
