中国“人造太阳”实验，有新发现！

Core Insights - The Chinese "artificial sun" EAST has confirmed the existence of a density-free zone in tokamak operations based on the boundary plasma-wall interaction self-organization theory, with results published in the journal "Science Advances" on January 1, 2026 [1] Group 1: Research Findings - The research team developed a boundary plasma-wall interaction self-organization (PWSO) theoretical model, highlighting the critical role of boundary radiation in triggering the density limit and revealing the physical mechanisms involved [5] - The experiments utilized the EAST all-metal wall environment and methods such as electron cyclotron resonance heating and pre-filling to reduce boundary impurity sputtering, actively delaying the onset of the density limit and plasma disruption [5][6] - The experimental results aligned closely with PWSO theoretical predictions, marking the first confirmation of the tokamak density-free zone, providing significant insights into understanding the density limit and offering a physical basis for high-density tokamak operations [6]