CONSTRUCTION OF AN INFRARED BEAMLINE DEDICATED TO STUDY OF BIO-MEDICAL PROBLEMS

国家同步加速器光源的光束线U2B正在进行 作为红外线光束线设计和建造，专门用于研究 生物问题。在1996年冬季停工期间， U2B光束线的水平接受度从10提高到45 毫弧度，为了增加光束线的整体流量， 尤其是在远红外波段。一个楔形的CVD钻石窗口已经被 安装用于分离VUV环和毛坯的特高压真空 光束线真空。粗真空镜盒，它将 接受红外线发出的VUV光环，已安装完毕。 其余光束线部件的设计已获批准 零部件已经订购完毕。红外光谱仪已经买好了， 已安装，并使用内部红外源运行，直到 Hbeamline建造完成。这台光谱仪是Nicolet公司的 HMagna 560，配备可互换(1)KBR和硅 分束器和(2)MCT和DTGS探测器。这些 分束器/探测器组合允许在 中H区(650-4000 cm-1)和远红外区(10-650 cm-1)。平面图 正在对这台光谱仪进行改装以用于真空操作，并 分步扫描功能。Nicplan红外显微镜，配备 包括一个视频成像摄像机和电动x-y样品台， NICOLET红外显微光谱分析系统。最后，300英尺2 实验室空间的一部分已被授予生物红外线 用于样品制备和表征的程序。

Beamline U2B at the National Synchrotron Light Source is being designed and built as an infrared beamline dedicated to the study of biological problems. During the winter shutdown of 1996, the horizontal acceptance of the U2B beamline was increased from 10 to 45 milliradians, in order to increase the overall flux of the beamline, especially in the far infrared. A wedged, CVD diamond window has been installed to separate the UHV vacuum of the VUV ring and the rough vacuum of the beamline. The rough-vacuum mirror box, which will accept the infrared light out of the VUV ring, has been installed. Design of the remainder of the beamline components has been approved and parts are on order. The infrared spectrometer has been purchased, Hinstalled, and is running with an internal infrared source until Hbeamline construction is complete. The spectrometer is a Nicolet HMagna 560, equipped with interchangeable (1) KBr and silicon beamsplitters and (2) MCT and DTGS detectors. These beamsplitter/detector combinations permit data collection in the mid-H(650-4000 cm-1) and far- (10-650 cm-1) infrared regions. Plans are Hunderway to modify this spectrometer for in-vacuum operation and step-scan capabilities. A NicPlan infrared microscope, equipped with a video imaging camera and motorized x-y sample stage, is included in the Nicolet system for infrared microspectroscopy. Finally, 300 ft2 of laboratory space has been awarded to the biological infrared program for sample preparation and characterization.