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第四代同步辐射光源加速器物理与技术

Accelerator physics and technology of the fourthgeneration synchrotron radiation light source

  • 摘要: 同步辐射光源是20世纪应用最广泛的高性能X射线源,已成为物理、化学、能源环境、生物医学、先进材料等领域前沿研究的重要工具。进入21世纪,基于电子储存环的同步辐射光源的发展前沿是第四代同步辐射光源(4GLS)。其采用紧凑型的多弯铁消色散结构,可以实现接近甚至达到X射线衍射极限的超低束流发射度,将光源亮度在第三代光源基础上进一步提升2—3个数量级。文章将重点介绍第四代同步辐射光源关键的加速器物理与技术,以及国际范围内第四代同步辐射光源装置的发展情况。

     

    Abstract: Synchrotron radiation light sources based on electron storage rings are the most widely used high-performance X-ray sources in the past 20th century, and have become important tools for frontier research in the fields of physics, chemistry, energy and environment, biomedical science, and advanced materials. In the 21st century, the foremost ring-based light source is the fourth-generation synchrotron radiation light source (4GLS). It generally adopts a compact multi-bend achromat lattice to achieve ultralow electron beam emittance that approaches the diffraction limit of X-rays, thus enabling an increase in the brilliance of the synchrotron radiation by 2—3 orders of magnitude compared to existing third-generation sources. This article will focus on the key accelerator physics and technology issues, as well as the current status, of 4GLSs around the world.

     

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