Uppsala Berlin joint Laboratory (UBjL)

The UBjL is formally an agreement between the Department of Physics and Astronomy of Uppsala University and the Institute for Methods and Instrumentation for Synchrotron Radiation Research, G-ISSR, at the Helmholtz-Zentrum Berlin. It has been established to widen the scientific opportunities within surface science by making use of the latest technological developments on the spectrometer as well as on the synchrotron side.

Experimental endstations

UBjL is driving three experimental endstations at the synchrotron radiation source BESSY II: the Low Dose Photoemission (LowDosePES) endstation at the dipole beamline PM4, the Coincidence Electron Spectroscopy for Chemical Analysis endstation (CoESCA) at the undulator beamline U52 as well as the FEMTOSPEX surface dynamics endstation at the undulator beamline U56. Whereas a mechanical chopper is used at the PM4 beamline to produce quasi single bunch mode that allows for operation of the ArTOF independent of the actual BESSY operation mode, the method of pulse picking resonant excitation is used for the same purpose at the U52 beamline.

The LowDosePES endstation is equipped with an ArTOF spectrometer and a hemispherical electron analyser, which can be used independently to perform angle-resolved or high resolution studies on radiation sensitive materials. In summer 2016 a fs-laser setup has been installed, making it possible to perform time- and angle-resolved experiments.

The newer CoESCA endstation is equipped with two ArTOF spectrometers in order to allow for angle-resolved electron coincidence studies on solids. 

The FEMTOSPEX Surface Dynamics endstation enables angle- and time-resolved photoelectron spectroscopy with the possibility of using femtosecond slicing.

Publications

Last modified: 2023-05-17