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Thomas Michlmayr,Andreas Fognini,Thomas B¨ahler,Gerard Salvatella Orgill´es,Christoph Wetli,Andreas Vaterlaus,Yves Acremann 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We report on the design and tests of a completely mobile photoemission end station for femtosecondtime, energy and spin resolved magnetodynamics experiments. The setup is designed forthe use at free-electron laser (FEL) x-ray beamlines as well as at synchrotron facilities. In situsample preparation in an adjacent UHV chamber is performed. The assembly can be altered toobtain energy resolved measurements with the help of a hemispherical electron energy analyzeror to obtain energy integrated measurements by inserting an electron transfer lens system. Themagnetic information is obtained by spin analysis with a 50 kV Mott detector. The setup is testedin house with an electron gun, at the Swiss Light Source (SLS) and has been used at the FEL atFLASH in Hamburg. Results show the practicability of the system and exemplarily the kineticenergy dependent polarization of the low energy secondary electrons emitted from a 15 ML ironfilm on W(110) is presented.