Enhancement of a Synchrotron Beamline for Magnetics Research and Education

用于磁学研究和教育的同步加速器光束线的增强

• 批准号: 0216134
• 负责人: Richard Kurtz
• 金额: $ 9.45万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0216134&HistoricalAwards=false
• 关键词: Enhancement; Synchrotron; Beamline; Magnetics; Research

This grant supports enhancement of a synchrotron beamline for magnetics research and education. Development of a new generation of spintronic materials is occurring and there is a need for facilities targeted to characterize the relationship between magnetic properties and electronic and physical structures. This grant addresses this need by leveraging a significant investment in the existing beamline at the LSU CAMD synchrotron light source. The upgrade will provide for improved characterization of magnetic materials using circularly polarized light at energies spanning the L-edges of 3d transition metals. The upgrade consists of two sets of improvements. First, the current plane-grating monochromator beamline will be enhanced to allow for the use of tunable, circularly polarized synchrotron light. Stepper-motor controlled, cooled baffles will be constructed to extract circularly polarized light from the upper and lower portions of the orbit. The beamline was designed to accommodate two gratings, and a new, 300 - 1200 eV, grating will be installed to extend the current photon energy range. Finally, a triple-reflection polarizer will be installed beyond the last optical element in the beamline to measure the degree of light polarization. A second component is a general-purpose user-endstation to provide for sample preparation, evaporators for in-situ film growth, and coils for magnetizing samples. Spectroscopy will include total yield measurements as well as photoemission and provide for inclusion of current LEED and RHEED instrumentation. This enhancement will leverage investments in a group of magnetic materials researchers from Louisiana, Nebraska, Alabama's NSF-MINT Center, and Illinois and provide for a simple but reliable method to characterize a broad range of magnetic materials. The access provided by the location of this light source, located in an underserved region of the country, serves the needs of researche

该补助金支持增强同步加速器光束线用于磁学研究和教育。新一代自旋电子材料的发展正在发生，并且需要有针对性地表征磁性与电子和物理结构之间的关系的设施。该补助金通过利用对LSU CAMD同步加速器光源现有光束线的重大投资来满足这一需求。该升级将提供使用能量跨越3d过渡金属L边缘的圆偏振光对磁性材料进行改进的表征。升级包括两组改进。首先，目前的平面光栅单色器光束线将被增强，以允许使用可调谐的，圆偏振的同步加速器光。步进电机控制，冷却挡板将被构造成从轨道的上部和下部提取圆偏振光。光束线的设计，以适应两个光栅，和一个新的，300 - 1200 eV，光栅将被安装，以扩大目前的光子能量范围。最后，在光束线中最后一个光学元件的后面安装一个三重反射偏振器，以测量光的偏振度。第二个组件是一个通用的用户终端站，提供样品制备，蒸发器的原位薄膜生长，和线圈磁化样品。光谱学将包括总产量测量以及光电发射，并提供包括当前的LEED和RHEED仪器。这种增强将利用对来自路易斯安那州、内布拉斯加州、亚拉巴马州的NSF-MINT中心和伊利诺伊州的磁性材料研究人员的投资，并提供一种简单但可靠的方法来表征各种磁性材料。该光源位于该国服务不足的地区，其位置提供的访问服务满足了研究的需求。