The SuSI beam emittance collimation channel

The Superconducting Source for Ions (SuSI) is a newly designed, fully superconducting Electron Cyclotron Resonance (ECR) ion source working at 14.5 and 18 GHz microwave frequencies at the National Superconducting Cyclotron Laboratory (NSCL). Preliminary results indicate that SuSI is capable of producing ion beam currents comparable to other 18 GHz sources[1].;In parallel to the increase in beam currents offered by SuSI compared to existing sources at the NSCL, a dedicated collimation channel has been designed to tailor the beam emittances to the K500 cyclotron acceptance, which is about 75 pimmamrad[?], so as tcy minimize the beam losses in the cyclotron extraction channel. The collimation channel uses four collimation stages and three solenoids in between to rotate the beam transversely in phase space. Beam simulations showed that the proposed design can efficiently collimate Learns from SuSI under various scenarios. The collimation channel was commissioned with SuSI in a test area in June 2009. Experimental results have confirmed the effective collimation capability observed in the beam simulations.;The collimation channel anti SuSI were moved to the Coupled Cyclotron Facility (CCF) ECR. area in July 2009 in replacement of the former 6 GHz SuperConducting ECR ion source (SC-ECR). Since then the collimation channel has been recommissioned and provided adequate capability for emittance collimation and ECR parameter optimization at the CCF.