自由电子激光自从1977年问世以来,由于它一系列的优点,从而受到了科学家的广泛重视。世界各大实验室,特别是美国的各大实验室,都根据自身的条件,相继开展了自由电子激光的大规模研究工作,并在不同的领域内,为探索新的物理机制和研究新的物理问题,发展新的技术途径和开辟新的应用项目,提高激光的功率和效率以及进一步缩短波长等 Since the advent of free electron laser in 1977, due to its a series of advantages, which received widespread attention of scientists. All the major laboratories in the world, especially the major laboratories in the United States, have carried out large-scale research on free electron lasers one by one according to their own conditions and have conducted research in different fields in order to explore new physical mechanisms and to study new Physical issues, developing new technical approaches and opening up new applications to increase the power and efficiency of lasers and further reduce the wavelength