Physics application software plays a crucial role in the tuning and operation of the FRIB accelerator. Development began long before the initial commissioning, and with real beam operations, numerous new applications have been created and refined through collaboration between engineers and physicists. These efforts have significantly enhanced beam tuning efficiency and delivery for experiments. This paper provides an overview of the current state of software development, highlights key applications, and outlines the roadmap for future advancements.

Since starting the user operation of Facility for Rare Isotope Beams (FRIB) at Michigan State University in May 2022, the driver linac has provided more than a dozen ion beam species from Oxygen to Uranium to the production target. FRIB has routinely provided 20 kW primary beams on target since March 2025, which is a factor of 20 higher than at the beginning of scientific user operation. In this presentation, the recent progress of FRIB driver linac beam development, a discussion of efficient primary beam tuning procedures based on physics applications, and accelerator improvement projects for low-loss accelerator will be discussed.

Data inaccuracies make training an accurate Beam Quadrupole Moment at BPM (BPMQ) model challenging. Similarly, reconstructing Courant-Snyder (CS) parameters from BPMQ predictions is difficult due to BPMQ model limitations. Increasing the number of BPMQ predictions helps mitigate overfitting in CS inference caused by inaccurate BPMQ predictions. We present Bayesian Active Learning (BAL) to acquire measurements strategically, improving CS parameter inference despite model limitations.

FSEE has been established at the Facility for Rare Isotope Beams (FRIB) to provide heavy ion beams for testing Single Event Effects (SEE). It shares the existing FRIB front-end and the first segment of superconducting linac with a dedicated beam line and an end-user station. Highly charged ions in cocktails are produced with Electron Cyclotron Resonance ion sources. Beam species are then selected and injected into a cw Radio Frequency Quadrupole with an external buncher followed by a cw superconducting linac consisting of 100 quarter-wave resonators that can output continuously up to 20 MeV/u for heaviest ions and 40 MeV/u for light ions. The 17-meter FSEE line starts with a dipole followed by scattering foils and a unique optical lattice consisting of 4 quadrupoles and 2 octupoles to obtain a uniform beam with size up to 20cm by 20cm. With 7 ions at 16 energies, FSEE has been providing an extensive range of beam parameters for users since its commissioning in 2021. We will present the design, development, and operation of the FSEE facility, discuss the beam tuning and characterization of beam parameters with sets of diagnostics and physics applications including Machine Learning.

A new capability for heavy-ion single-event effects (SEE) testing in electronics systems has been implemented on the Facility for Rare Isotope Beams (FRIB) linear accelerator, providing beams to users in the ~10 – 40 MeV/nucleon range. We discuss the design and implementation of the FRIB SEE (FSEE) beamline and user interfaces including descriptions of: (i) the beamline optical lattice and layout; (ii) establishment and changing of linac tunes to support testing requirements; (iii) ion source development to support fast and frequent beam changes; and (iv) dosimetry instrumentation and user support infrastructure. We review operational experience and include discussion of ongoing development efforts in dosimetry and facility capabilities to deliver high-flux, short-pulse heavy ion beams. Development of the K500 cyclotron into a dedicated facility, and options for a high energy beamline are introduced.