Illustration of the design of GaToroid, a non-rotating gantry for use in hadron therapy. This type of radiotherapy uses a combination of beams of protons, neutrons and heavy particles, to kill cancerous tissue. This is different from normal radiotherapy, which uses high-energy photon beams (such as gamma rays or X-rays). Conventional hadron therapy gantries rotate around the patient to maximise irradiation of the target tumour. This makes them large, heavy and complex, limiting the number that are built. GaToroid has been designed to be smaller and lightweight. To do this it uses a superconducting toroidal magnet (multicoloured) to bend the beam (red line).