Radiation emerging from bending magnets in synchrotrons and storage rings is increasingly utilized as far-infrared sources. Such source can be by two or three orders of magnitude brighter than a black body at 2000 K, at all infrared wavelengths. On the other hand, the total flux (13 (number of photons/sec/unit bandwidth) is greater than that emitted by a black body only for wavelengths A, > 100 microns. With the aim of increasing the photon flux and of extending the applications of Infrared Synchrotron Radiation (IRSR), we have realized a beamline (SIRLOIN) where IRSR is extracted from an undulator .
P. Roy, P. Roy,
"A new infrared synchrotron beamline at lure", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 192907 (14 December 1992); doi: 10.1117/12.2298124; https://doi.org/10.1117/12.2298124