First light on 3d photoionization of multiply charged xenon ions: A new photon-ion merged beam setup at PETRA III.

A photon-ion merged beam endstation has been set up at the variable polarization XUV-beamline P04 of PETRA III in Hamburg. In a commissioning experiment first results could be obtained for multiple photoionization of Xeq+ ions (q = 1,2,..,5) at photon energies around the 3d ionization threshold.