The cyclotron gas stopper at FRIB getting ready for operations

Schwarz, S.; Sumithrarachchi, C.; Bollen, G.; Magsig, C.; Morrissey, D. J.; Ottarson, J.; Villari, A. C.C.

doi:10.1016/j.nimb.2023.04.058

The cyclotron gas stopper at FRIB getting ready for operations

Journal Article · Fri May 19 00:00:00 EDT 2023 · Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2023.04.058· OSTI ID:2419547

Schwarz, S. ^[1]; Sumithrarachchi, C. ^[2]; Bollen, G. ^[2]; Magsig, C. ^[2]; Morrissey, D. J. ^[3]; Ottarson, J. ^[3]; Villari, A. C.C. ^[2]

Michigan State Univ., East Lansing, MI (United States); OSTI
Michigan State Univ., East Lansing, MI (United States)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.

Linear gas stopping cells have been used for nearly two decades to slow down projectile fragments at the National Superconducting Cyclotron Laboratory, now the Facility for Rare Isotope Beams, for experiments with low-energy and reaccelerated beams. In order to efficiently stop and rapidly extract light to medium-mass fast ions, a cyclotron gas-stopper has been constructed. It uses a cyclotron-type magnet and a helium-gas filled stopping chamber to slow down the injected beam. RF ion guides transport the stopped ions to the center of the magnet and axially through the bore before acceleration to <60 keV. Following successful offline tests, the cyclotron stopper was moved to an experimental vault and connected to a new momentum–compression beam line. Beam transport to and into the cyclotron stopper was tested with stable beams. Finally, using ⁴⁶K fragments, the first successful stopping and extraction of a high-energy beam with the cyclotron stopper was demonstrated.

Research Organization:: Michigan State Univ., East Lansing, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: SC0000661

OSTI ID:: 2419547

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, Journal Name: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms Vol. 541; ISSN 0168-583X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (10)

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