Speaker
Description
Heavy ion linacs use charge stripping to increase accelerating efficiency. At FRIB, the charge selector intercepts unwanted charge states from their broad distribution after stripping at the energies of 17-20 MeV/u. Design of a movable collimator for high-power heavy ion beams becomes very challenging due to high volumetric power deposition, radiation damage, radioactivation, and mechanical constraints. Uranium beam, for instance, produces the average power density on the charge selector that is orders of magnitude higher than proton beams, and the radiation damage rates that heavy ions produce reach several dpa/minute. This talk will present the design challenges and our experience in the development of the FRIB charge selector.
Funding Agency
This work is supported by the U.S. Department of Energy Office of Science under Cooperative Agreement No. DE-SC0023633, the State of Michigan, and Michigan State University.
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