Beam Buncher with Sinoidal Modulation for the Axial Injection System of the Isochronous Cyclotron U-240

摘要

Use of buncher in the external injection system of the isochronous cyclotron is intended to enlarge the luminosity, which is especially important during acceleration of very low-current beams of the polarized and multicharged ions. Problems of two-gap particle bunching with sinusoidal modulation are considered. An optimal buncher arrangement, allowing for the energy spread in the source beam, is determined. Calculation of buncher parameters is done for the axial injection system of the isochronous cyclotron U-240. The buncher application allows one to obtain compact bunches and enlarge the source efficiency by 50%. (ERA citation 08:049723)