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TY - UNPB AU - Yang, Y. ED - Eshraqi, Mohammad ED - Trahern, Garry ED - Schaa, Volker RW TI - Transverse Coupling Property of Beam From ECR Ion Sources J2 - Proc. of HB2016, Malmö, Sweden, July 3-8, 2016 C1 - Malmö, Sweden T2 - ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams T3 - 57 LA - english AB - Experimental evidence of the property of transverse coupling of beam from Electron Cyclotron Resonance (ECR) ion source is presented. It is especially of interest for an ECR ion source, where the cross section of extracted beam is not round along transport path due to the magnetic confinement configuration. When the ions are extracted and accelerated through the descending axial magnetic field at the extraction region, the horizontal and vertical phase space strongly coupled. In this study, the coupling configuration between the transverse phase spaces of the beam from ECR ion source is achieved by beam back-tracking simulation based on the measurements. The reasonability of this coupling configuration has been proven by a series of subsequent simulations. Based on this study, an improved operation scheme for the SFC injector line at IMP has been proposed to reduce the projection emittances by beam decoupling. Preliminary test has verified this proposal. PB - JACoW CP - Geneva, Switzerland ER -