Synchotron Radiation Spectroscopy toward 21st Century

我们在美国、欧洲和台湾访问了许多高亮度synchrotron radiation facilities，以便在21世纪D1世纪看到他们的研究活动和战略。一般来说，美国设施对开发他们自己的活动产生了影响，而这些活动与其他SR设施不同。ALS中的显微镜和成像是一个例子。对相关电子系统的电子状态的研究在Alladin， NSLS和SSRL中得到了强有力的推广。在欧洲的设施中，有一种活动的变体。例如，高分辨率光发射和发光光谱是MAX II中的主要主题，在BESSY II中覆盖了宽场。在日本，X射线区域被高亮度SR设施覆盖了高亮度SR设施SPring-8。我们在SPring-8上构建了一个软X射线辅助补偿器光束线，并在500和2000 eV以上其他SR设施中展示了迄今为止最好的性能。高能量、高分辨率的块状敏感光发射是由我们为几个强相关的电子系统提供的。研究报告的结果显示，大自然正在刺激世界上的广泛利益。此技术将在21世纪D1世纪的照片发射光谱分析中创造一个突破。

We visited several high brilliance synchrotron radiation facilities in USA, Europe and Taiwan to see their research activities and strategies into the 21ィイD1stィエD1 century. Generally speaking, the American facilities are making efforts to develop their own activity which is different from other SR facilities. Microscopy and imaging in ALS is one of the examples. Studies of electronic states of correlated electron systems are strongly promoted in Alladin, NSLS and SSRL. In European facilities, one finds variety of activities. For example, high resolution photoemission and luminescence spectroscopy are main subjects in MAX II, whereas wide fields are covered in BESSY II.In Japan, X-ray region is satisfactorily covered by high brilliance SR facility SPring-8. We have constructed a soft X-ray helical undulator beam line at SPring-8, which shows the far best performance between 500 and 2000eV over other SR facilities. High energy, high resolution bulk sensitive photoemission is performed by us for several strongly correlated electron systems. The results reported in Nature is stimulating wide interest in the world. This technique will make a breakthrough in photoemission spectroscopy of solids in 21ィイD1stィエD1 century.