The experimental hall of DA F NE, the new double storage ring for electrons at positrons in operation at Frascati. This behaviour is important to understand the gain in brilliance of IR-SR with respect to a conventional broadband laboratory source. It also determines the required vertical acceptance angle at the extraction port of the ring. The SR spectral distribution is continuous from IR to X-rays. In the case of DA F NE, the high beam current gives a very high photon flux, which is independent of the beam energy, depending only on the beam current, in the visible-IR range.
SR is also a highly polarised source.
The radiation is linearly polarised with horizontal polarisation in the plane of the orbit, while above and below the plane a certain fraction of the emitted intensity is vertically polarised, as a function of the vertical angle and depending on the wavelength. At the end of the beamline, two experimental stations will be in operation working with an interferometer and a monochromator. The scientific programme of the beamline includes IR spectroscopy and microspectroscopy, with special attention to biological and medical applications. A. Marcelli, E. Burattini, A. Nucara, P. Calvani, G. Cinque, C. Mencuccini, S. Lupi, F. Monti and M. Sanchez del Rio, in Infrared Synchrotron Radiation , Nuovo Cimento D, Ed. H. Winick and S. Doniach, Synchrotron Radiation Research .