Multi-turn charge-exchange beam injection is the key technique to achieve high-intensity proton beam accelerators. In J-PARC RCS. 400-MeV H- beams from LINAC are injected into stripper foils such that most of the beams are converted into protons. The stripper foils are irradiated not only with the injected H- beams but also with the protons circulating during the beam injection period. https://thesportsshopkingswinfordes.shop/product-category/reydon/