The linear accelerator includes a low-energy section (E≤ 90MeV) with a Radio Frequency Quadrupole (RFQ), a Drift Tube Linac (DTL), and a high-energy section made up of superconducting cavities that are designed to accelerate protons up to 2 GeV. Superconducting cavities can be divided into three categories. The first consists of spoke cavities, operating at 352 MHz and optimized for proton beams at half the speed of light (β= v/c = 0.50), with energies between 90 MeV and 216 MeV.
