1. Department of Physics and Astronomy; University of Missouri; Columbia Missouri 65211
2. Physics Department; Institute for Energy Technology; NO-2027 Kjeller Norway
3. Photon Science DESY; D-22607 Hamburg Germany
4. Department of Physics; FI-00014 University of Helsinki; Finland
5. Macromolecular Chemistry Group; Bergische Universität Wuppertal; D-42097 Wuppertal Germany