INFLUENCE OF MAGNETIC FIELDS ON THE ANOMALOUS RECOMBINATION RATE OF IONS WITH FREE ELECTRONS AT LOW ENERGIES G. Gwinner$^{\ast}$, T. Bartsch$^\sharp$, M. Beutelspacher$^\ast$, N. Ekl\"ow$^\dagger$, P. Glans$^\dagger$, A. Hoffknecht$^\sharp$, E. Lindroth$^\dagger$,\\ A. M\"uller$^\sharp$, A.A. Saghiri$^\ast$, S. Schippers$^\sharp$, M. Schmitt$^\ast$, D. Schwalm$^\ast$, G. Wissler$^\ast$, A. Wolf$^\ast$. $^\ast$Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany $^\sharp$Universit\"at Giessen, Giessen, Germany $^\dagger$Stockholm University, Stockholm, Sweden Radiative recombination of C$^{6+}$ ions with free electrons was studied at the storage ring TSR through a systematic variation of relevant parameters such as the magnetic field and the electron density in the electron cooler. The electron beam was characterized independently by observation of a narrow dielectronic recombination resonance in F$^{6+}$. A distinct dependence of the rate anomaly at zero energy on the magnetic field was observed. Full Abstract