Cross Sections, Cross Section Ratios and Magnetic Substate Cross Sections for Resonance Enhanced Ar+-4p 2,4LJ Satellites K.-H. Schartner*, G. Mentzel*, B. Zimmermann*, O. Wilhelmi*, H. Schmoranzer**, F. Vollweiler**, St. Lauer**, H. Liebel**, V.L. Sukhorukov***, B.M. Lagutin***, Ph.V. Demekhin***, I.D. Petrov*** * University of Giessen, D-35392 Giessen, Germany ** University of Kaiserslautern, D-67653 Kaiserslautern, Germany *** Rostov State University of Transport Communications, 344038 Rostov-on-Don, Russia Cross sections for photon-induced population of Ar+-4p satellites with different L and J were measured in the threshold energy range where strong resonance enhancement is observed. Photon-induced fluorescence spectroscopy (PIFS) was used. Our technique yields also the alignment parameter. Spin-orbit effects are identified from cross section ratios for the fine structure components and from the comparison of magnetic substate cross sections.