Development of Synchrotron Based Magnetotransport and Infrared Resonance Facility

国家同步加速器光源(NSLS)最近增加了两个新的红外提取端口，将支持总共5条新的光束线。其中之一是致力于固态研究，这需要长波长光谱覆盖范围。在通常困难的光谱范围内，同步加速器源在功率和亮度方面都比传统源具有约10倍和~1000倍的优势。该奖项支持开发高达15T磁场的红外光谱综合设施。该仪器的基本部件是一个远红外光谱仪和一个超导磁体。考虑了两种主要的工作模式：“传统的”磁传输和磁调制光谱(MMS)。作为一种红外磁传输设备，该仪器将允许我们研究小样本，其中光源的亮度是至关重要的。在MMS模式下，该设施将开辟新的方法来研究金属和绝缘体中的传导电子自旋共振(CESR)、半导体量子结构中的光学检测共振以及总体上的磁调制光谱。被研究的材料包括巨磁电阻化合物、高温超导体、富勒烯、半导体和外延半导体结构等系统，该仪器将满足广泛的用户想要探索固体在磁场中的光学性质的需求。用户访问将在NSLS用户方案的框架内管理，为科学审查过程中批准的项目提供免费的波束时间。%*

9803025MihalyThe National Synchrotron Light Source (NSLS) has recently added two new infrared extraction ports which will support a total of 5 new beamlines. One of these is dedicated to solid state research, which requires long wavelength spectral range coverage. The synchrotron source possesses both power and brightness advantages (by factors of ~10 and ~1000, respectively) over conventional sources in this usually difficult spectral range.This award supports the development of a comprehensive facility for infrared spectroscopy in magnetic fields up to 15T. The basic elements of the instrumentation are a far-IR spectrometer and a superconducting magnet. Two principal modes of operation are considered: "traditional" magnetotransport and magnetic modulation spectroscopy (MMS). Used as an IR magnetotransport device, the instrument will allow us to study small samples, where the brightness of the source is crucial. In the MMS mode the facility will open up novel ways of studying conduction electron spin resonance (cESR) in metals and insulators, optically detected resonance in semiconducting quantum structures, and magnetic modulation spectroscopy in general. The materials to be investigated include compounds of colossal magneto-resistance, high temperature superconductors, fullerenes, semiconductors and epitaxial semiconducting structures and other systems.The instrumentation will meet the needs of a wide range of users wanting to explore optical properties of solids in magnetic fields. User access will be managed in the framework of the NSLS user program, providing free beamtime for the projects approved in a scientific review process.%%%***