Physical Review Special Topics - Accelerators and Beams Authors: N. A. Tahi, V. Kim, B. Schlitt, W. Barth, L. Groening, I. V. Lomonosov, A. R. Piriz, Th. Stöhlker, and H. Vormann Decoupling of beams previously [...] Physics (physics.acc-ph) Author: L. Groening Collimation and decoupling of ECR source beams for brilliance optimization Nuclear Instruments and Methods in Physics Research A Authors: C. Xiao, L. Groening [...] Vibrations of a 4-Rod RFQ at GSI Accelerator Physics (physics.acc-ph) Authors: P. Gerhard, L. Groening, K.-O. Voss Experimental Proof of Adjustable Single-Knob Ion Beam Emittance Partitioning Physical Review