Space-Charge Limit for a Drift-Tube Linac from the Stability Point of View of Longitudinal Periodicity

摘要

A method to estimate the space-charge limit for a drift-tube linac, using the strong focusing theory for the longitudinal oscillation and the space-charge theory by Vlasov, is described. Because of the periodicity of the drift tubes and the gaps, the structure can be considered as a longitudinal alternating gradient focusing system analogous to the transverse alternating gradient focusing using quadrupoles. An upper current limit is obtained from the stability point of view. (ERA citation 05:021056)