Design of the High Rigidity Spectrometer at FRIB

S. Noji; R. G. T. Zegers; G. P. A. Berg; A. M. Amthor; T. Baumann; D. Bazin; E. E. Burkhardt; M. Cortesi; J. C. DeKamp; M. Hausmann; M. Portillo; D. H. Potterveld; B. M. Sherrill; A. Stolz; O. B. Tarasov; R. C. York

doi:10.1016/j.nima.2022.167548

paper

Design of the High Rigidity Spectrometer at FRIB

arXiv:2207.05995 · doi:10.1016/j.nima.2022.167548

Abstract

A High Rigidity Spectrometer (HRS) has been designed for experiments at the Facility for Rare-Isotope Beams (FRIB) at Michigan State University (MSU). The HRS will allow experiments to be performed with the most exotic neutron-rich isotopes at high beam energies ( $≳$ 100MeV/u). The HRS consists of an analysis beamline called the High-Transmission Beamline (HTBL) and the spectrometer proper called the Spectrometer Section. The maximum magnetic rigidity of the HRS is 8Tm, which corresponds to the rigidities at which rare-isotope beams are optimally produced at FRIB. The resolving power, angular acceptance, and momentum acceptance are set to match the anticipated scientific program. An ion-optical design developed for the HRS is described in detail, along with the specifications of the associated magnet and detector systems.

24 pages, 26 figures, 6 tables