CATHI is a mono-site ITN with CERN as main host institution, offering research training in the application of advanced accelerator technology, beam instrumentation, ultra-high vacuum, cryogenics, radiation protection and advanced material technologies in one of Europe’s leading Radioactive Ion Beam facilities (ISOLDE) at CERN, and its future upgrade (HIE-ISOLDE).The proposed upgrade, which consists of the design and construction of a Super-Conducting linear accelerator and associated high-power target, offers tremendous opportunities for research training in an international, multidisciplinary environment, thereby ensuring that the expertise present in Europe will continue playing an important role in the progress of nuclear physics and related fields.Training projects will have concrete objectives and deliverables. The young researchers will be supervised and mentored by internationally recognized experts and have access to state-of-the-art equipment. Hands-on project training will be supplemented with formal training courses in relevant and related fields, and a wide variety of complementary training courses, colloquia and seminars. Mobility within the ITN will ensure exposure to complementary research and industry environments.CATHI will provide ESRs and ERs with unparalleled research training opportunities in the framework of established, trans-national research networks (ISOLDE Collaboration, EURONS, ENSAR). It will provide hands-on experience through participation in the R&D, construction and commissioning of the super-conducting linac systems and in the design study to prepare for a future increase in intensity of the PSB beam.