Acquisition of Ultra-High Angular and Energy Resolution Photoemission System

获得超高角度和能量分辨率光电发射系统

• 批准号: 9300812
• 负责人: Zhi-Xun Shen
• 金额: $ 8.6万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9300812&HistoricalAwards=false
• 关键词: Acquisition; Ultra; Angular; Energy; Resolution

The novel design of this new ultra-high resolution photoemission system will give an energy and angular resolution of better than 5 meV and 0.2 degrees, respectively. The 5 meV resolution is about a factor of 4-5 times better than most current state of the art spectrometers. The 0.2 degrees angular resolution is about a factor of 10 times better than the typical angle- resolved photoemission spectrometer. Most importantly, the analyzer enables one to simultaneously acquire 80 spectra at different angles in the time it would normally take to acquire one spectrum with a conventional spectrometer. In addition, the large analyzer size also dramatically enhances the efficiency of the spectrometer. This means that the new spectrometer will have a total counting rate at least 100 times better than the best spectrometer in the field now. This equipment will be used for a variety or research programs at Stanford University. It will also be made available to researchers from other institutions. The successful implementation of this system will have a very positive impact on many exciting areas of research on advanced materials. This includes the high-temperature superconductors, semiconductors, the fullerenes and their derivatives, magnetic materials, the Mott insulators, and heavy fermion and mixed valence compounds. Some of the key issues in contemporary physics will be very effectively addressed by the extremely high energy and angular resolution made available by the new spectrometer. Examples include the superconducting gap in cuprates and the Kondo resonance in heavy fermions. Acquisition of this system will greatly enhance ongoing and future research, as well as the educational environment at Stanford University and other institutions.

这种新型超高分辨率的新颖设计 光电发射系统将给出能量和角分辨率， 分别优于5 meV和0.2度。 5 MeV 分辨率大约是目前大多数分辨率的4-5倍 最先进的光谱仪。 0.2度角分辨率 比一般的角度好10倍 分辨光电子能谱仪 最重要的是 分析仪可同时采集80个光谱， 不同的角度在正常的时间内获得一个 用常规光谱仪进行光谱分析。 此外，大 分析仪的尺寸也大大提高了 光谱仪 这意味着新的光谱仪将有一个 总计数率至少比最好的好100倍 光谱仪在现场 该设备将用于 斯坦福大学的各种或研究项目。 它还将 向其他机构的研究人员提供。 该系统的成功实施将产生非常 积极影响许多令人兴奋的领域的研究先进的 材料. 这包括高温超导体， 半导体、富勒烯及其衍生物、磁性 材料，莫特绝缘体，重费米子和混合价 化合物. 当代物理学的一些关键问题将是 非常有效地解决了极高的能量和角度 分辨率由新的光谱仪提供。 示例 包括铜酸盐中的超导能隙和近藤共振 在重费米子中。 购买这套系统将大大提高 正在进行和未来的研究，以及教育环境 在斯坦福大学和其他机构。