Speaker
Description
The closed shell breeding technique has been used to significantly improve the charge breeding efficiency of the Argonne National Laboratory electron beam ion source. The source serves as a charge breeder for the Californium Rare Isotope Breeder Upgrade (nuCARIBU), accepting radioactive beams of 1+ or 2+ ions and raising their charge state for efficient post-acceleration in the ATLAS linac. The 100 ms breeding window and flexible drift tube voltage scheme affords the appropriate time and electron beam energy required to achieve a closed shell configuration for many of the mid-mass species typical of nuCARIBU. Initial tests with stable cesium reached an absolute charge breeding efficiency of 72% for Cs27+ and a total efficiency of 93%. The nuCARIBU system is undergoing commissioning, and results with radioactive species will be presented.
This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. This research used resources of ANL’s ATLAS facility, which is a DOE Office of Science User Facility.
