The main goal of the FINESTLUMI endstation is time-resolved luminescence spectroscopy research under vacuum ultraviolet (VUV) as well as soft X-rays (XUV) excitations. Any materials in solid phase (single crystals, glasses, ceramics, films, powders etc.) can be studied. The endstation consisting of an ultra-high vacuum chamber with a closed-cycle helium cryogenic system was constructed providing sample temperatures T = 4 – 400 K. To analyze photoluminescence in the UV to near IR range a Shamrock 0.3 m spectrometer (Andor) equipped with the Newton CCD and several photomultiplier detectors (Hamamatsu) is coupled to two optical fibers (working in different spectral ranges), collecting emission from the sample. Time-resolved spectroscopy experiments available in single bunch mode of storage ring and/or utilize a chopper. The possibility to use high-resolution excitation (0.01 nm at 100 nm) in scanning mode and the option of tuneable polarization of the incident light make this beamline very attractive for the field of luminescence studies under VUV and XUV excitations.Additionally to the photoluminescence spectroscopy the FINESTLUMI endstation can be applied for optical spectroscopy experiments examining the reflection signal from flat samples’ surfaces as well as detecting the transmitting light passing through the samples studied.Advanced experiments which include a combination of synchrotron light and some external light sources (for a pump-probe and a photostimulated spectroscopy) are available also if external light sources are provided by users.VUV spectrometer and VUV detection system intended for the study of the luminescence signals at energies higher than 6 eV (below 200 nm) are under development and construction.
Photoluminescence endstation at FinEstBeAMS.