New light source in a submillimeter to millimeter range using the coherent radiation from the single-bunch electron beam at ISIR

Abstract

The coherent synchrotron radiation has a continuous spectrum in a submillimeter to millimeter range and is highly intense compared with the other far-infrared light sources. A new light source was established by using the coherent radiation from the intense single-bunch electron beam generated with the 38 MeV L-band linear accelerator at The Institute of Scientific and Industrial Research, Osaka University. In the experiments the beams at an energy of 27 MeV and a charge of electrons in a bunch of 30 nC were used. The intensity, stability and polarization of the coherent synchrotron radiation were measured at wavelengths of 0.7–1.4 mm. The absorption spectroscopy was carried out for N 2 O gas. The results agreed with those obtained by calculation. The application of the pulsed radiation which is synchronized with the electron bunch, to stroboscopic pulse-radiolysis experiments is under preparation.