Daniel, KrzysztofBochenek-Dobrowolski, RyszardDoruch, HenrykGuguła, KonradGrzybek, RyszardJanik, GrzegorzKisielowski, AndrzejLipka, BogdanMolęda, JanuszNorys, TadeuszPyzioł, WojciechSałach, BogusławSulikowski, JacekSroka, ArturTarczoń, RyszardWłodek, Lucyna2018-01-122018-01-122006http://rifj.ifj.edu.pl/handle/item/177The AIC-144 cyclotron at the Institute of Nuclear has been upgraded to produce the beams, which could be applied for proton radiotherapy of eye melanoma. For the improvement of quality of ion beam is necessary to better precision of forming the magnetic field inside the cyclotron chamber. It has been described the interdependent of precision of fitting the chamber of the cyclotron against ferrous pole pieces of the electromagnet on the magnetic field. Modernization of transporting ion beam to place of proton radiotherapy is described. Special emphasis is given to simplification of configuration of that transport and advantages of that modernization.polReport