中国“人造太阳”实验 有新突破！

Core Insights - The Chinese research team has made a breakthrough in the field of nuclear fusion by confirming the existence of a density free zone in the Tokamak device, known as the "artificial sun," which provides important physical evidence for high-density operation in magnetic confinement fusion devices [1][2] Group 1: Research Findings - The research team developed a boundary plasma-wall interaction self-organization (PWSO) theoretical model, revealing the critical role of boundary impurities in triggering radiation instability at the density limit [2] - By utilizing a fully metallic wall environment in the EAST device, the researchers employed methods such as electron cyclotron resonance heating and pre-filling gas to reduce boundary impurity sputtering, actively delaying the onset of the density limit and plasma disruption [2] - The experimental results aligned closely with the PWSO theoretical predictions, confirming the existence of the Tokamak density free zone for the first time [2] Group 2: Collaborative Efforts - The work was a collaborative effort involving the Hefei Institute of Physical Science, Huazhong University of Science and Technology, and Aix-Marseille University in France, supported by the national magnetic confinement fusion program [2]