1. BESSY m.b.H., Albert-Einstein-Strasse 15, 12489 Berlin, Germany, Department of Physics, Uppsala University, Box 530, SE-751 21 Uppsala, Sweden, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Center for Biomolecules and Complex Molecular Systems, Flemingovo nám. 2, 16610 Prague 6, Czech Republic, Fritz Haber Institute for Molecular Dynamics, Hebrew University, Jerusalem, Israel 91904, and Max-Born-Institut für Nichtlineare Optik and Kurzzeitspektroskopie,...