Abstract
Beam commissioning in the first superconducting segment of the Facility for Rare Isotope Beams
Highlights
In February 2019, the FRIB driver accelerator became the highest-energy continuous wave hadron linac in the world
Since the lithium stripper is not yet available in the tunnel, thin carbon foils were utilized for charge stripping of 20.3 MeV=u Ne, Ar, Kr, and Xe ion beams in our experiments
A comparison of the measured data with the calculation using the Baron formula [12] shows that the equilibrium charge state distribution (CSD) was reached with foil thicknesses of 0.4 and 0.8 mg=cm2 for neon and argon beams, respectively
Summary
In February 2019, the FRIB driver accelerator became the highest-energy continuous wave hadron linac in the world. This significant milestone was achieved after the acceleration of four ion species (40Ar9þ, 86Kr17þ, 10Ne6þ, and 129Xe26þ) to 20.3 MeV=u in 14 cryomodules with 99 of two types of superconducting (SC) cavities: βopt 1⁄4 0.041 and βopt 1⁄4 0.085. Including a high peak current mode, (ii) the study of beam properties after the stripping with a carbon foil, and (iii) an empirical demonstration of LS1 capability to accelerate dual charge state heavy ion beams
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