System integration and technical readiness for FRIB accelerator commissioning

After Michigan State University (MSU) was selected for the site of the Facility for Rare Isotope Beams (FRIB) in 2008, technical construction started from 2014. The FRIB accelerator attained Key Performance Parameters (KPP) of project completion (CD-4) defined by US Department of Energy (DOE) in December 2021, and beam was finally delivered through the entire FRIB project scope in January 2022. The FRIB accelerator is the world's highest-energy Continuous Wave (CW) hadron linac and designed to accelerate all stable ions to energies above 200 MeV/u. During the construction, FRIB pursued a phased commissioning approach to proceed with installation and commissioning in parallel. Beamline installation and beam test started from the Front End segment, and then the beam line was extended to Transfer Hall in several steps. This paper seeks to describe system integration and technical readiness for FRIB accelerator commissioning and give an overview of the FRIB installation and commissioning. (author)