Accelerator commissioning and rare isotope identification at the Facility for Rare Isotope Beams
J. Wei, Hiroyuki Ao, B. Arend, Steven Beher, G. Bollen, Nathan Bultman, F. Casagrande, Wendy Chang, Yoon Hyuck Choi, S. Cogan, Chris Compton, M. Cortesi, John Curtin, Karina W. Davidson, Xiaoji Du, Kyle Elliott, Brandon Ewert, A. Facco, Adam Fila, K. Fukushima, V. Ganni, Andrei Ganshyn, Jing Gao, T. Glasmacher, Jun Guo, Yue Hao, W. Hartung, Nusair Hasan, M. Hausmann, Keith Holland, H. Hseuh, M. Ikegami, D. Jager, Shelly Jones, N. Joseph, Takuji Kanemura, S.-H. Kim, P. Knudsen, B. Kortum, E. Kwan, T. Larter, Robert Laxdal, M. Larmann, Kaustubh Laturkar, John LeTourneau, Z.-Y. Li, S. Lidia, Guillaume Machicoane, C. Magsig, Peter Manwiller, F. Marti, T. Maruta, Allyn Mccartney, Ethan Metzgar, Samuel Miller, Yoichi Momozaki, D. Morris, Martin Mugerian, I.N. Nesterenko, Christine Nguyen, W. O’Brien, K. Openlander, P. N. Ostroumov, M. Patil, Alexander Plastun, John Popielarski, Laura Popielarski, M. Portillo, John Priller, Xing Rao, M. Reaume, Haitao Ren, Kenji Saito, M. K. Smith, M. Steiner, A. Stolz, O. Tarasov, B. Tousignant, Roben Walker, Xiaojun Wang, John Wenstrom, G. West, Ken Witgen, M Wright, Ting Xu, Yi Xu, Y. Yamazaki, T. Zhang, Qiang Zhao, Shan Zhao, K. Dixon, M. Wiseman, M. Kelly, K. Hosoyama, S. Prestemon
Abstract
In 2008, Michigan State University was selected to establish the Facility for Rare Isotope Beams (FRIB). Construction of the FRIB accelerator was completed in January 2022. Phased accelerator commissioning with heavy ion beams started in 2017 with the normal-conducting ion source and radio-frequency quadrupole. In April 2021, the full FRIB driver linear accelerator (linac) was commissioned, with heavy ion beams accelerated to energies above 200 MeV/nucleon by 324 superconducting radiofrequency (SRF) resonators operating at 2 K and 4 K with liquid-helium cooling. In preparation for high-power operation, a liquid lithium charge stripper was commissioned with heavy ion beams up to uranium-238, followed by the simultaneous acceleration of multiple-charge-state heavy ion beams to energies above 200 MeV/nucleon. In December 2021, selenium-84 was produced with the FRIB target using a krypton-86 primary beam, demonstrating FRIB’s capability for scientific discovery.