Commissioning results of the ReA EBIT charge breeder at the NSCL: First reacceleration of stable-isotope beams

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• 作者：A. Lapierre ; S. Schwarz ; K. Kittimanapun ; J.A. Rodriguez ; C. Sumithrarachchi ; B. Barquest ; E. Berryman ; K. Cooper ; J. Fogleman ; S. Krause ; J. Kwarsick ; S. Nash ; G. Perdikakis ; M. Portillo ; R. Rencsok ; D. Skutt ; M. Steiner ; L. Tobos ; W. Wittmer ; G. Bollen ; et al.
• 关键词：Electron-beam ion trap ; Highly charged ions ; Charge breeding ; Rare isotopes ; Post-accelerator
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：15 December, 2013
• 年：2013
• 卷：317
• 期：part_PB
• 页码：399-401
• 全文大小：763 K

文摘

ReA is a reaccelerator of rare-isotope beams at the National Superconducting Cyclotron Laboratory (NSCL). The rare isotopes are produced by fast projectile fragmentation. After production, they are separated in-flight and thermalized in a He gas 鈥渃atcher鈥?cell before being sent to ReA for reacceleration to a few MeV/u. One of its main components is an electron-beam ion trap (EBIT) employed to convert injected singly charged ions to highly charged ions prior to injection into linear-accelerator structures. The ReA EBIT features a high-current electron gun, a long trap structure, and a two-field superconducting magnet to provide both the high electron-beam current density needed for fast charge breeding and high capture probability of injected beams. This paper presents recent commissioning results. In particular, ions have been injected, charge bred to and extracted for reacceleration up to 60 MeV. First charge-breeding results of beams injected from a commissioning Rb ion source in the NSCL鈥檚 beam 鈥渟topping鈥?vault are also presented.