Development of Synchrotron Based Magnetotransport and Infrared Resonance Facility

9803025 mihaly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个新的光束线。其中一个专用于固态研究，这需要长波长光谱范围的覆盖。在这一通常难以分辨的光谱范围内，与传统光源相比，同步加速器光源具有功率和亮度两方面的优势（分别为10倍和1000倍）。该合同支持在高达15T的磁场中开发红外光谱综合设备。仪器的基本元件是一个远红外光谱仪和一个超导磁体。考虑了两种主要的操作模式：“传统”磁输运和磁调制光谱（MMS）。作为红外磁输运设备，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探测共振，以及一般的磁调制光谱。研究的材料包括巨磁阻化合物、高温超导体、富勒烯、半导体和外延半导体结构等体系。该仪器将满足想要探索磁场中固体光学性质的广泛用户的需求。用户访问将在NSLS用户计划的框架内进行管理，为科学审查过程中批准的项目提供免费的光束时间。%%%***

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.%%%***