首次证实！我国“人造太阳”实验获重要成果

Core Insights - The "artificial sun" known as the Experimental Advanced Superconducting Tokamak (EAST) has achieved significant results in plasma physics experiments, confirming the existence of a density free zone in tokamaks [1][3] Group 1: Research Achievements - The research team developed a new theoretical model called the Plasma-Wall Self-Organization (PWSO) model, which identifies the critical role of boundary impurities in triggering radiation instability at the density limit [3] - The experiments utilized the fully metallic wall environment of the EAST device, employing methods such as electron cyclotron resonance heating and pre-filling to reduce impurity sputtering at the device boundary, thereby delaying the onset of the density limit and plasma disruption [3] - Researchers successfully lowered the physical sputtering caused by tungsten impurities on the target plate, allowing the plasma to surpass the density limit and smoothly enter the predicted density free zone, with experimental results closely aligning with PWSO theoretical predictions [3]