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

开发用于研究高温超导体电子结构的高分辨率光电子能谱仪

• 批准号: 9019981
• 负责人: David Lynch
• 金额: $ 33万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-15 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019981&HistoricalAwards=false
• 关键词: Development; Resolution; Photoelectron; Spectrometer; Study

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.

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、高效率的基于波动器的束流线，用于解决高温超导材料的科学和技术问题。该波束线将具有比美国现有的更高的角度和能量分辨率，并将为法国、德国和日本目前正在开发的努力提供补充能力。这条光束线将非常适合用于高温超导体的高分辨率光电子能谱研究。信号源将是一个特别设计的波动器。辐射将被沃兹沃斯单色器分散，光栅是光子路径中唯一的光学元件。单色辐射将冲击样品上250微米大小的点，这通常是在低温下。光电子将由半球形电容分析仪进行能量分析，该分析仪在测角仪上装有位置敏感探测器。这条波束线预计将于1993年底完工，一般用户将有大约四分之一的作业时间用于更广泛的应用。