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短脉冲激光在实验室天体物理方面的研究进展

Research Progress of Laboratory Astrophysics by Taking Advantage of Short Pulse Lasers

  • 摘要: 随着啁啾脉冲放大技术(Chirped Pulse Amplification,CPA)的飞速发展,激光功率密度实现了飞跃式的提升,利用短脉冲激光开展实验室天体物理研究的条件日趋成熟。短脉冲激光与靶相互作用可以产生相对论粒子(正负电子、质子、中子等)和高能电磁辐射(X射线、γ射线),这些粒子和辐射的产生过程与天体中的某些物理现象相对应。介绍了利用短脉冲激光开展实验室天体物理的研究进展,重点介绍了核天体物理、空心离子光谱学、相对论无碰撞冲击波以及等离子体状态诊断等。

     

    Abstract: With the development of Chirped Pulse Amplification (CPA), the laser power density has increased dramatically, which makes the conditions for using short-pulse lasers to conduct laboratory astrophysics research increasingly mature. A short pulse laser interacting with a target can produce relativistic particles (electrons, protons, neutrons) and intense radiation (X-ray, gamma-ray). These processes in experiments correspond to some extreme astronomical phenomena. The developments of laboratory astrophysics using short-pulse lasers are briefly introduced, such as (1) nuclear processes in astrophysical objects; (2) spectral studies of hollow ions; (3) collisionless shock waves; and (4) diagnostics. These developments demonstrate the potential of short-pulse lasers for performing a number of experiments in the realms of laboratory astrophysics.

     

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