The frib sc-linac: installation and phased commissioning*

J. Wei, H. Ao, S. Beher, B. Bird, N. Bultman, F. Casagrande, D. Chabot, W. Chang, S. Cogan, C. Compton, J. Curtin, E. Daykin, K. Davidson, K. Elliott, A. Facco, A. Fila, V. Ganni, A. Ganshyn, P. Gibson,T. Glasmacher, I. Grender, W. Hartung, L. Hodges, K. Holland, H.-C. Hseuh, A. Hussain, M. Ikegami, S. Jones,T. Kanemura,S.-H. Kim, M. Konrad,P. Knudsen, R. E. Laxdal, J. LeTourneau, Z. Li, S. Lidia, G. Machicoane, P. Manwiller, F. Marti, T. Maruta, E. Metzgar, S. Miller, D. Morris, C. Nguyen, K. Openlander, P. Ostroumov,A. Plastun, J. Popielarski, L. Popielarski, J. Priller, M. Reaume,H. Ren, T. Russo, K. Saito, M. Shuptar, J. Stetson, D. Victory, R. Walker,X. Wang, J. Wenstrom, M. Wright, M. Xu,T. Xu, Y. Yamazaki, Q. Zhao,S. Zhao

semanticscholar（2019）

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摘要

The Facility for Rare Isotope Beams (FRIB) superconducting (SC) radio-frequency (RF) driver linac is designed to accelerate all stable ions, including uranium, to energies above 200 MeV/u. The linac includes 46 cryomodules (CMs) containing 104 quarter-wave resonators (QWRs) and 220 half-wave resonators (HWRs). With the newly-commissioned refrigeration system supplying liquid helium to the QWR and SC solenoids, heavy ion beams including Ne, Ar, Kr, and Xe were accelerated to > 20 MeV/u in the first linac segment (LS1), using 15 CMs containing 104 QWRs (β = 0.041 and 0.085) and 39 solenoids. Even at this intermediate stage, the FRIB accelerator has already become the world’s highest-energy continuous-wave (CW) hadron linac [1]. Installation of HWR CMs (β = 0.29 and 0.53) is proceeding in parallel. Development of β = 0.65 elliptical resonators is on-going to support an energy upgrade to 400 MeV/u. This paper summarizes the FRIB SC-linac installation and phased commissioning status that is on schedule and on budget.

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