Design of the MEBT rebunchers for the SPIRAL 2 driver

International audienceThe SPIRAL 2 project uses normal conducting rebunchers to accelerate high intensity beams of protons , deuterons and heavier ions. All cavities work at 88 Mhz , the beta is 0,04 and 3 rebunchers are located in the MEBT line, which accepts ions with A/q up to 6. The paper describes the RF design and the technological solutions proposed for an original 3 gap cavity , characterised by very large beam holes (60mm) and providing up to 120 kV of effective voltag