The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Maruta, T. AU - He, Z.Q. AU - Ikegami, M. AU - Marti, F. AU - Ostroumov, P.N. AU - Wei, J. AU - Yamazaki, Y. AU - Zhao, Q. ED - Schaa, Volker RW TI - Beam Loss Mechanisms in Ion Linacs and Development of Beam Collimation System J2 - Proc. of HB2018, Daejeon, Korea, 17-22 June 2018 C1 - Daejeon, Korea T2 - ICFA Advanced Beam Dynamics Workshop T3 - 61 LA - english AB - Machine errors and interaction of ion beam with the stripper are known sources of possible beam losses in ion linacs. Our studies show that contaminant ion beams extracted from Electron Cyclotron Resonance ion source and accelerated together with main beam thanks to similar charge-to-mass ratio can produce substantial losses after the stripping due to modified charge-to-mass ratio. The contaminant beams must be well separated and collimated at low energies to avoid losses in the high energy section of the linac. An additional mechanism for beam losses is charge-exchange reactions in the residual gas near the charge selection slits. A set of collimators have been developed to intercept both contaminant ions and main beam halo in the example of Facility for Rare Isotope Beams (FRIB). PB - JACoW Publishing CP - Geneva, Switzerland ER -