大连相干光源运行现状及科学应用

Scientific research at Dalian coherent light source

大连相干光源是一台基于常温直线加速器的自由电子激光装置,是我国第一台高增益自由电子激光用户装置,是世界上唯一工作在极紫外波段(50~150 nm)的自由电子激光用户装置.自2017年实现首次出光以来,大连相干光源一直保持稳定运行,科学家利用大连相干光源开展科学研究并取得了一系列重要的科研成果.本文首先介绍了大连相干光源的优异特性、运行及升级现状,围绕团簇科学、大气科学、分子光化学、能源催化、生命科学、分子激发态超快动力学领域展示大连相干光源的科学应用情况,主要内容包括基于大连相干光源发展的先进科学实验方法、取得的重要科研成果以及未来的发展方向.

A free electron laser with high brightness,and ultrafast laser pulses in the vacuum ultraviolet(VUV)wavelength region is an ideal light source for the excitation of valence electrons and ionization of molecular systems with very high efficiency.It is quite helpful for studies of important dynamic processes in physical,chemical and biological systems.Dalian coherent light source(DCLS),as the unique VUV light source from 50–150 nm in the world,has delivered bright optical beams in picoseconds or 100 femtoseconds for such researches 24 h per day since first lasing in 2017.After 5 years operation DCLS has become a highly distinctive facility with high brightness and short pulse in the VUV range,which enables researchers from diverse fields to carry on scientific research.This article focused on the typical method and research at DCLS.