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MT29 Abstracts and Technical Program

1–6 Jul 2025
Omni Boston Hotel at the Seaport
US/Eastern timezone

Conference Management

Thu-Mo-Or1-08: The High Rigidity Spectrometer at FRIB: Magnet Development Status

3 Jul 2025, 12:30
15m
Momentum ABC

Momentum ABC

Speaker

Dr Yoonhyuck Choi (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA)

Description

Since commissioning in 2022, the Facility for Rare Isotope Beams (FRIB) has successfully delivered over 270 rare isotope beams, including the discovery of five new rare isotopes. To fully leverage the scientific potential of FRIB, a new High Rigidity Spectrometer (HRS) has been proposed to overcome the limitations of the existing Spectrometer of S800, the legacy from the NSCL era.
The HRS comprises two primary sections: the High-Transmission Beamline (HTBL) and the Spectrometer Section (SPS). At the ASC 2024, we introduced the key design features of the HTBL magnets and outlined the project’s path forward. This talk will report an update on the progress of construction and testing for the first-article HTBL magnets: switching dipole and cold iron quadrupole triplet. Additionally, we will unveil the preliminary design of new magnets including the sweeper and sector dipoles, as well as the coil-dominated quadrupoles singlets for the SPS. This talk will discuss the challenges encountered during the dipole design process, particularly those related to the large beam space requirements. Furthermore, we will highlight the collaborative efforts with Lawrence Berkeley National Laboratory (LBNL) in developing two large-aperture coil-dominated quadrupoles that incorporate nested higher-order multipoles. We will introduce the quadrupole coil winding, force-restrain architecture, and tooling design.

Authors

Dr Yoonhyuck Choi (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Xiaoji Du (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Danlu Zhang (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Junseong Kim (MIT) Dr Hengkang Zheng (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Mr John Wenstrom (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Mr Hai Nguyen (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Mr Yamen Al-Mahmoud (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Mr Ryan Koschay (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Ms Courtney Smith (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Mr Samuel Miller (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Mauricio Portillo (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Shumpei Noji (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Brad Sherrill (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Prof. Ting Xu (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Prof. Jie Wei (Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA) Dr Ye Yang (Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA) Dr Lianrong Xu (Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA) Dr Soren Prestemon (Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA) Dr Tengming Shen (Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA)

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