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arXiv 2011.01363physics.atom-phastro-ph.IMphysics.acc-phphysics.ins-detphysics.plasm-ph
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海德堡紧凑型电子束离子阱

The Heidelberg compact electron beam ion traps

P. Micke, S. Kühn, L. Buchauer, J. R. Harries, T. M. Bücking, K. Blaum, A. Cieluch, A. Egl, D. Hollain, S. Kraemer, T. Pfeifer, P. O. Schmidt, R. X. Schüssler, … 展开作者

P. Micke, S. Kühn, L. Buchauer, J. R. Harries, T. M. Bücking, K. Blaum, A. Cieluch, A. Egl, D. Hollain, S. Kraemer, T. Pfeifer, P. O. Schmidt, R. X. Schüssler, Ch. Schweiger, T. Stöhlker, S. Sturm, R. N. Wolf, S. Bernitt, J. R. Crespo López-Urrutia

摘要:

电子束离子阱(EBIT)是制备和研究高电荷态离子(HCI)的理想工具。为了降低其建造、维护和运行成本,我们开发了一种新颖、紧凑的室温设计,海德堡紧凑型EBIT(HC-EBIT)。四个已经投入使用的设备运行在最强的领域(高达0.86 T),报告使用永磁体,运行电子束电流高达80毫安和能量高达10千电子伏的EBIT。他们展示了HCI的生产,捕获和提取脉冲Ar $^{16+}$束和连续100 pA离子束的高度带电的电荷状态29+,已经与4 mA,2 keV的电子束。此外,HC-EBIT提供了大立体角端口,因此具有高光子计数率,例如。例如,在一个实施例中,在HCl中的双电子复合的X射线光谱中,达到Fe $^{24+}$,在5 keV下实现$E/ΔE > 1500$的电子能量分辨能力。除了传统的轴上电子枪,我们还实现了一种新型的离轴枪的激光,同步加速器,和自由电子激光的应用,提供清晰的光学访问沿陷阱轴。我们报告的第一个操作在同步辐射设施证明共振光激发高电荷氧。

英文摘要:

Electron beam ion traps (EBIT) are ideal tools for both production and study of highly charged ions (HCI). In order to reduce their construction, maintenance, and operation costs we have developed a novel, compact, room-temperature design, the Heidelberg Compact EBIT (HC-EBIT). Four already commissioned devices operate at the strongest fields (up to 0.86 T) reported for such EBITs using permanent magnets, run electron beam currents up to 80 mA and energies up to 10 keV. They demonstrate HCI production, trapping, and extraction of pulsed Ar$^{16+}$ bunches and continuous 100 pA ion beams of highly charged Xe up to charge state 29+, already with a 4 mA, 2 keV electron beam. Moreover, HC-EBITs offer large solid-angle ports and thus high photon count rates, e. g., in x-ray spectroscopy of dielectronic recombination in HCIs up to Fe$^{24+}$, achieving an electron-energy resolving power of $E/ΔE > 1500$ at 5 keV. Besides traditional on-axis electron guns, we have also implemented a novel off-axis gun for laser, synchrotron, and free-electron laser applications, offering clear optical access along the trap axis. We report on its first operation at a synchrotron radiation facility demonstrating resonant photoexcitation of highly charged oxygen.

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