FinEstBeaMS: A wide-range Finnish-Estonian Beamline for Materials Science at the 1.5 GeV storage ring at the MAX IV Laboratory

Abstract

The FinEstBeaMS beamline is under construction at the 1.5 GeV<br/>storage ring of the MAX IV Laboratory at Lund, Sweden. It has been<br/>designed to cover an unusually wide energy range from ultraviolet (4.3<br/>eV) to soft X-rays (1000 eV) but experiment will also be possible at the<br/>Mg and Al Ka energies. Instead of having two insertion devices and a<br/>deferent optical scheme for low and high photon energy regions, we have<br/>based our design on a single long-period, elliptically polarizing<br/>undulator and a plane grating monochromator. This solution will provide<br/>very good conditions for planned experiments in the whole photon energy<br/>region. The beamline will have two branches: one will be used to<br/>investigate free atoms, molecules and clusters with photoelectron/photoion<br/>coincidence spectroscopy as well as solids with photoluminescence<br/>spectroscopy whereas the other one will be dedicated to ultra-high vacuum<br/>studies of surfaces and interphases, utilizing X-ray photoelectron<br/>spectroscopy and X-ray absorption spectroscopy. This paper focuses on the<br/>optical design of the beamline and general design concepts of the gasphase<br/>and solid-state end stations.