中国“人造太阳”找到突破密度极限方法

Core Insights - The Chinese "artificial sun," the Experimental Advanced Superconducting Tokamak (EAST), has achieved significant breakthroughs in overcoming the density limit in nuclear fusion experiments [1][2] - The research team has confirmed the existence of a density free zone in tokamak operations, which is crucial for enhancing the economic viability of fusion energy [1] Group 1: Breakthroughs in Fusion Research - The research team developed a new theoretical model called the Plasma-Wall Self-Organization (PWSO) theory, which identifies the critical role of boundary impurities in triggering the density limit [2] - The experiments conducted at EAST utilized a fully metallic wall environment and methods such as electron cyclotron resonance heating to delay the onset of the density limit and plasma disruption [2] Group 2: Experimental Results - The team successfully reduced physical sputtering caused by tungsten impurities on the target plate, allowing the plasma to surpass the density limit and enter the predicted density free zone [2] - The experimental results closely matched the predictions made by the PWSO theory, marking the first confirmation of the existence of a tokamak density free zone [2]