一、引言在电子同步加速器或电子储存环中,作圆周运动的高能电子会发出一种极强的光辐射,这种光辐射就叫“同步辐射”。这种辐射在电子同步加速器建造的初期被认为是一大危害,是限制电子同步加速器能量提高的主要原因。但自从1963年美国国家标准局的研究人员 I. INTRODUCTION In the electron synchrotron or the electron storage ring, a high-energy electron that makes a circular motion emits a very strong optical radiation called “synchrotron radiation.” This kind of radiation was considered a major hazard in the early days of the electron synchrotron and was the main reason for limiting the energy increase of the electron synchrotron. But since 1963 the researchers of the National Bureau of Standards