低能区衍射限储存环同步辐射的应用浅析

Brief introduction of low-energy diffraction limited storage-ring-based synchrotron radiation and its applications

在科学技术新需求的推动下,同步辐射光源持续往前发展。目前,同步辐射装置发展已历经三代,正处于第四代同步辐射光源蓬勃发展阶段。基于衍射极限储存环的同步辐射装置是第四代同步辐射光源的典型代表之一。第四代同步辐射光源主要发展趋势是进一步减小电子束流发射度,使光源具有极好的横向相干性,以及产生圆截面辐射的能力。如果束流发射度降至光学衍射极限“辐射波长/4π”,其亮度比第三代同步辐射光源高2个数量级。这种同步辐射光源在性能上发生的质的飞跃,将给同步辐射实验技术带来实质性的突破,从而给前沿科学技术研究和现代产业发展带来全新的机遇。从国际同步辐射发展趋势入手,首先介绍低能区衍射限储存环光源的特色和性能,然后介绍其带来的同步辐射实验技术的进步,并浅析低能区衍射限储存环光源在材料科学、能源科学、生命科学和环境科学上的应用,以及其带来的产业机遇。最后,总结和展望了低能区衍射限储存环光源带来的技术突破和潜在的应用前景。

Driven by the demand of science and technology, synchrotron radiation(SR) facilities continue to develop. At present, the development of SR has gone through three generations, and is in the vigorous development stage of the fourth generation(4th). SR based on diffraction-limited storage ring is one of the typical representative of the 4th synchrotron light sources. The mainstream of the 4th SR is to further reduce the electron beam emittance, so that the light source from the 4th SR exhibits excellent transversal coherence and is able to produce circular cross-section radiation. If the beam emittance drops to the optical diffraction limited “ radiation wavelength/4π”, its brightness enhances to 2-3 orders of magnitude higher than that of the third generation SR light source. The qualitative leap in the performance of this SR light source will bring a substantive breakthrough to the SR-based experimental techniques,and bring new opportunities to the cutting-edge scientific and technological research, as well as the development of modern industry. Starting with the development trend of worldwide SR facilities, this review first introduces the characteristics and performance of low-energy diffraction limited storage ring(DLSR) light source, then introduces the progress of experimental techniques brought by DLSR, and illustrates the application of low-energy DLSR light source in material science, energy science, life science and environmental science, as well as its industrial opportunities. Finally, the technical breakthrough and potential application prospect of low energy DLSR light source are summarized and prospected.