Qiang Zhao (Michigan State University)
THP4301
FRIB accelerator improvement projects to mitigate beam losses in post-stripper linac
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The Facility for Rare Isotope Beams (FRIB) is planning four Accelerator Improvement Projects (AIPs) during a two-month summer shutdown to mitigate beam losses induced by the stripper. The motivation for this project has been described in previous publications. The implementation of these projects is required to accelerate multiple-charge-state heavy-ion beams simultaneously as beam power on target ramps up. These projects require modification of approximately 30 meters of beamline within the FRIB tunnel and include installing larger-bore magnets and beamline components before and after the liquid lithium stripper, implementing new second-harmonic cavities, replacing the dipole chamber with a high-heat-load-rated version at Folding Segment 1, and installing new quadrupole magnets at Folding Segment 2. Effective integration of design, technical device fabrication, installation, and commissioning within a limited shutdown window requires close coordination among multiple engineering and physics teams. This paper presents the planning methodology, execution strategy, and planned performance outcomes of these upgrades to manage concurrent accelerator improvement projects within a constrained maintenance schedule.
  • X. Rao, P. Ostroumov, S. Miller, A. Plastun, N. Bultman, M. Hu
    Facility for Rare Isotope Beams
  • Q. Zhao
    Michigan State University
Paper: THP4301
DOI: reference for this paper: 10.18429/JACoW-IPAC2026-THP4301
About:  Received: 11 May 2026 — Revised: 17 May 2026 — Accepted: 19 May 2026 — Issue date: 22 May 2026
Cite: reference for this paper using: BibTeX, LaTeX, Text/Word, RIS, EndNote