How are high-energy electrons generated in celestial bodies? This question has always troubled astrophysicists. Reporters learned from the National Astronomical Observatory of the Chinese Academy of Sciences on the 17th that, relying on the large-scale laser device "Shenguang II", a major national scientific and technological infrastructure, scientific researchers from the observatory and other institutions realized the random acceleration of electrons in large-scale kinetic turbulent plasma for the first time, opening the mystery of the generation of high-energy electrons in complex celestial environments. The relevant research results were published online in the journal Nature Communications. As one of the 125 scientific questions published in the journal Science, the origin of high-energy particles in celestial bodies has always been an unsolved mystery. Astrophysicists have proposed various mechanisms such as magnetic reconnection acceleration, shock wave acceleration, and random acceleration to explain the generation mechanism of high-energy particles in different celestial environments. Recently, laboratory astrophysics research has made a series of important advances in particle acceleration, achieving turbulent magnetic reconnection acceleration and shock wave acceleration in the laboratory. "However, up to now, the random acceleration mechanism has not been confirmed, and the main difficulty is how to generate large-scale kinetic turbulent plasma similar to celestial bodies in the laboratory." Dr. Yuan Dawei, the first author of the paper and the National Astronomical Observatory of the Chinese Academy of Sciences, introduced. This time, researchers used the "Shenguang II" large-scale laser device to generate supersonic convective plasma in the laboratory, and induced the generation and development of electromagnetic Weber instability using beam velocity anisotropy, thereby inducing the formation of large-scale plasma disorder structures. They further analyzed and found that the power spectrum of the disordered structure was highly consistent with the kinetic turbulence spectrum, and the experiment also measured the power-law spectra of high-energy electrons from different angles. Zhao Gang, academician of the National Astronomical Observatory of the Chinese Academy of Sciences and co-author of the paper, said that the theoretical simulation found that these high-energy electrons mainly came from the hot electrons in the turbulent plasma and had multiple "collisions" with the magnetic island, that is, turbulent random acceleration. This is of great significance for understanding particle acceleration and high-energy radiation in the complex environment of celestial bodies. (New Society)