This paper reports on the development and testing of a novel, highly efficient technique for the injection of very rare species into electron beam ion traps (EBITs) for the production of highly charged ions (HCI). It relies on in-trap laser-induced desorption of atoms from a sample brought very close to the electron beam resulting in a very high capture efficiency in the EBIT. We have demonstrated a steady production of HCI of the stable isotope 165Ho from samples of only 1012 atoms (∼300 pg) in charge states up to 45+. HCI of these species can be subsequently extracted for use in other experiments or stored in the trapping volume of the EBIT for spectroscopic measurements. The high efficiency of this technique extends the range of rare isotope HCIs available for high-precision atomic mass and spectroscopic measurements. A first application of this technique is the production of HCI of the synthetic radioisotope 163Ho for a high-precision measurement of the QEC-value of the electron capture in 163Ho within the "Electron Capture in Holmium" experiment [L. Gastaldo et al., J. Low Temp. Phys. 176, 876-884 (2014); L. Gastaldo et al., Eur. Phys. J.: Spec. Top. 226, 1623-1694 (2017)] (ECHo collaboration) ultimately leading to a measurement of the electron neutrino mass with an uncertainty on the sub electronvolt level.

中文翻译：

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在电子束离子阱内通过激光诱导解吸产生稀有物种的高电荷离子

本文报告了一种新型高效技术的开发和测试，该技术将非常稀有的物种注入电子束离子阱 (EBIT) 以产生高电荷离子 (HCI)。它依赖于陷阱内激光诱导的原子从非常接近电子束的样品中解吸，从而在 EBIT 中获得非常高的捕获效率。我们已经证明了稳定同位素 165Ho 的 HCl 可以从电荷状态高达 45+ 的仅 1012 个原子（~300 pg）的样品中稳定产生。这些物种的 HCl 可以随后被提取用于其他实验或存储在 EBIT 的捕获体积中用于光谱测量。该技术的高效率扩展了可用于高精度原子质量和光谱测量的稀有同位素 HCl 的范围。该技术的第一个应用是生产合成放射性同位素 163Ho 的 HCl，用于在“钬电子捕获”实验中高精度测量 163Ho 中电子捕获的 QEC 值 [L. Gastaldo 等人，J. Low Temp。物理。176, 876-884 (2014)；L. Gastaldo 等人，Eur. 物理。J.：规格。最佳。226, 1623-1694 (2017)]（ECHo 合作）最终导致对电子中微子质量的测量，其不确定性在亚电子伏特级。