Vacuum ultraviolet emission of a permanent magnet undulator on the ACO storage ring in Orsay

Abstract

We present VUV emission spectra taken on the ACO storage ring from the permanent magnet undulator NOEL (1), currently dedicated to free electron laser experiments, along with an overview at the properties of undulator radiation. The analysis of the spectra includes corrections for the emittance of the electron beam and a small mismatch between the direction of the measurement and the undulator axis. We conclude that this undulator represents a powerful source of VUV radiation in the spectral range 100-1 300 A.