VUV light polarization measured by coincidence electron spectrometry

Abstract

A method to extract the Stokes parameter describing circularly polarized components of VUV light from suitably selected photoelectron Auger electron coincidences is demonstrated for 2p photoionization in magnesium with subsequent L2,3-M1M1 Auger decay. Including the standard technique of non-coincident angle-resolved photoelectron spectrometry to obtain the Stokes parameters describing linearly polarized components of VUV light, the full polarization properties of VUV light have been measured, as an example, for 80 eV photons delivered from the TGM4 monochromator at BESSY I in Berlin.