Authors
Wei, J.; Ao, H.; Arend, B.; Beher, S.; Bollen, G.; Bultman, N; Casagrande, F; Chang, W.; Choi, Y.; Cogan, S.; Kelly, M.; Momozaki, Y.
Abstract
In 2008, Michigan State University was selected to establish the Facility for Rare Isotope Beams (FRIB). Construction of the FRIB accelerator was completed in January2022. Phased accelerator commissioning with heavy ion beams started in 2017 withthe normal-conducting ion source and radio-frequency quadrupole. In April 2021, thefull FRIB driver linear accelerator (linac) was commissioned, with heavy ion beams accelerated to energies above 200 MeV/nucleon by 324 superconducting radiofrequency(SRF) resonators operating at 2 K and 4 K with liquid-helium cooling. In preparationfor high-power operation, a liquid lithium charge stripper was commissioned with heavyion beams up to uranium-238, followed by the simultaneous acceleration of multiplecharge-state heavy ion beams to energies above 200 MeV/nucleon. In December 2021,selenium-84 was produced with the FRIB target using a krypton-86 primary beam,demonstrating FRIBs capability for scientific discovery.