2-Dimensional time-of-flight electron spectrometry: THE inner shell=
 excitations in rare gases and small molecules
B. Langer1,2, E. Kukk1,3, A. A. Wills1, A. Farhat1, O. Nayandin,1 M.=
 Alshehri1, N. Berrah1, J. D. Bozek3, D. Cubaynes4, R. Hentges5, U. Becker5
1Department of Physics, Western Michigan University, Kalamazoo, Michigan=
 49008-5151, USA
2Max-Born-Institut f=FCr Nichtlineare Optik und Kurzzeitspektroskopie,=
 Rudower Chaussee 6, D-12489 Berlin, Germany
3Lawrence Berkeley National Laboratory, Advanced Light Source, University of=
 California, Berkeley, California 97420, USA
4Laboratoire de Spectroscopie Atomique et Ionique, URA 775, CNRS, Universit=
=E9 Paris-Sud, 91405 Orsay, France
5Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195=
 Berlin, Germany
In order to study the threshold region of inner shell photoionization in=
 great detail we have combined our time-of flight (TOF) electron analyzers=
 with an advanced data acquisition and monochromator control program. This=
 allowed us to scan the photon energy in small steps over the Rydberg=
 resonances toward the threshold while taking complete electron spectra for=
 each photon energy. The 2-dimensional electron emission maps obtained by=
 such scans give insight into various processes occurring in the resonance=
 region and across the threshold.