Ion beam dynamics in superconducting drift tube linac

摘要

Ion superconducting linac is based on periodic system from short identical niobium drift tube cavities. This linac supplies typically 1 MV of accelerating potential per cavity. By specific phasing of the RF cavities one can provide a stable particle motion in the whole accelerator. The longitudinal and transverse ion beam dynamics is studied in this linac. The equation of motion in the Hamiltonian form done by means of the smooth approximation. This equation is used for analysis of the nonlinear ion beam dynamics in superconducting linac. It was shown that the connection between the phase acceptance and the transverse emittance can be found by means of the effective potential function. The focusing methods by the solenoid field and RF field are studied. The results of this investigation are compared with the numerical simulation of ion beam dynamics in superconducting linac.