【科技日报】中国“人造太阳”找到突破密度极限方法

Core Insights - The EAST (Experimental Advanced Superconducting Tokamak) has achieved significant results in nuclear fusion experiments, confirming the existence of a density free zone in tokamaks through boundary plasma and wall interaction self-organization theory [1][2] Group 1: Research Findings - The research team developed a new theoretical model called the Plasma-Wall Self-Organization (PWSO) model, which identifies the key role of boundary impurities in triggering radiation instability at the density limit [2] - The experiments utilized EAST's all-metal wall environment and methods such as electron cyclotron resonance heating to reduce impurity sputtering at the device's boundary, delaying the onset of the density limit and plasma disruption [2] - The successful breakthrough of the density limit and stable entry into the predicted density free zone were achieved by controlling the physical conditions of the target plate to minimize tungsten impurity sputtering, aligning experimental results with PWSO theory predictions [2]