Michard, S. [P:(DE-Juel1)141652] ; Meier, Matthias [P:(DE-Juel1)130830] ; Zastrow, U. [P:(DE-Juel1)130309] ; Astakhov, O. [P:(DE-Juel1)130212] ; Finger, F. [P:(DE-Juel1)130238]