Development of a High-Resolution Photoelectron Spectrometer for the Study of the Electronic Structure of High Temperature Superconductors

威斯康星大学同步辐射中心正在开发这条专门的光束线。该项目包括在存储环阿拉丁上建造一条新的高效波荡器，用于解决高温超导材料的科学和技术问题。光束线将具有比美国目前可用的更高的角度和能量分辨率能力，并将提供对法国、德国和日本目前正在开发的努力的补充能力。这条束线将非常适合高温超导体的高分辨率光电子能谱研究。震源将是一个特别设计的波荡器。辐射将由Wadsworth单色仪分散，而光栅是光子路径中唯一的光学元件。单色辐射将照射在样品上250微米大小的斑点上，通常是在低温下。光电子将由测角仪上带有位置灵敏探测器的半球电容分析仪进行能量分析。这条光束线预计在1993年底完工，一般用户可利用约四分之一的运行时间用于更广泛的应用。

This specialized beam line is under development at the Synchrotron Radiation Center, University of Wisconsin. The project includes the construction of a new, high-efficiency undulator based beam line on the storage ring, Aladdin, to be used to address the science and technology of high-temperature superconducting materials. The beam line will have higher angle and energy resolution capabilities than presently available in the United States, and will provide a complementary capability to the efforts now under development in France, Germany, and Japan. This beam line will be ideally suited for high-resolution photoelectron spectroscopic studies of high-temperature superconductors. The source will be a specially designed undulator. The radiation will be dispersed by a Wadsworth monochromator, with the grating being the only optical element in the photon path. The monochromatic radiation will impinge on a two-hundred and fifty micron size spot on the sample, which typically will be at low temperatures. The photoelectrons will be energy analyzed by a hemispherical capacitor analyzer with a position-sensitive detector on a goniometer. Completion on this beam line is anticipated for late 1993, and will be available to general users about one-fourth of the operating time for broader applications.