The Facility for Rare Isotope Beams (FRIB) began operation
with 1 kW beam power for scientific users in May 2022 upon
completion of 8 years of project construction. The ramp-up to the
ultimate beam power of 400 kW, planned over a 6-year period, will
enable the facility to reach its full potential for scientific
discovery in isotope science and applications. In December 2023, a
record-high beam power of 10.4 kW uranium was delivered to the
target. Technological developments and accelerator improvements are
being made over the entire facility and are key to completion of the
power ramp-up. Major technological developments entail the phased
deployment of high-power beam-intercepting systems, including the
charge strippers, the charge selection systems, the production
target, and the beam dump, along with support systems, including
non-conventional utilities (NCU) and remote handling
facilities. Major accelerator improvements include renovations to
aging legacy systems associated with experimental beam lines and
system automation for improved operational efficiency and better
machine availability. Experience must be gained to safely handle the
increased radiological impacts associated with high beam power;
extensive machine studies and advanced beam tuning procedures are
needed to minimize uncontrolled beam losses for the desired
operating conditions. This paper discusses the technological
developments and accelerator improvements with emphasis on major
R&D efforts.