Challenges in $^{11}$C charge breeding

In this paper we discuss the possibilities of using a charge breeding scheme based on an Electron Beam Ion Source for beam preparation of a radioactive $^{11}$ C beam for hadron therapy. Test measurements under extreme operating conditions were conducted at the REX-ISOLDE facility to explore the limitations of the charge breeder for high-intensity, low-repetition-rate, molecular CO $^{+}$ beams. Based on our findings, we discuss different possible scenarios of coupling a charge breeder with either a medical synchrotron or linear accelerator. This paper is a highly condensed version of an exhaustive report on the topic [1], which we would like to refer to for further details.