Characteristics and Performance of the National Synchrotron Light Source Infra-Red Beamline

Previously we have presented calculations of synchrotron radiation emission in the infra-red region which have shown it to be two or three orders of magnitude brighter than a black body source. We now report measurements of the spectral characteristics of the infra-red beamline at the National Synchrotron Light Source at Brookhaven National Laboratory in the region 5-700cm sup (-1). Both power and brightness have been considered and are shown to agree well with calculations. Two spectrometers were used for the measurements. For the region 25-700cm sup (-1) we used a rapid-scan Michelson Interferometer using a silicon beamsplitter. For the longer wavelength region from 5-40 sup (-1) we used an interferometer with a scanning lamellar grating. For both instruments comparative measurements were made using either globar or mercury sources.