Model of Energy Exchange in 3D Nonequipartitioned Beams . Phys. Rev. Lett. 86, 2313 (2001) R. Trassl, H. Bruning, K. v. Diemar, F. Melchert, E. Salzborn, I. Hofmann: Ion-ion charge exchange cross-sections [...] I. Hofmann, I. Meshkov, A. Sydorin: Strategy of intense ion beam accumulation by use of charge exchange accumulation. Nucl. Instr. And Meth. A 464, 616 (2001) A. Diehl, H. Bruning, R. Trassl, D. Hathiramani