title: Transverse coupling property of beam from ECR ion sources.
abstract: 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.
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Yuan
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: L T
authors.initials: LT
authors.lastname: Sun
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Feng
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: X
authors.initials: X
authors.lastname: Fang
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: W
authors.initials: W
authors.lastname: Lu
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: X Z
authors.initials: XZ
authors.lastname: Zhang
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: H W
authors.initials: HW
authors.lastname: Zhao