Proton beam dosimetry in the presence of magnetic fields using Farmer‐type ionization chambers of different radii. - Marot, Mathieu; Surla, Sonja; Burke, Elisa; Brons, Stephan; Runz, Armin; Greilich, Steffen; Karger, Christian P.; Jäkel, Oliver; Burigo, Lucas N. (Medical Physics, 2023)