RF acceleration of ultracold electron bunches

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The ultrafast and ultracold electron source, based on laser cooling and trapping of atomic gas and its subsequent near-threshold two-step photoionization, is capable of generating electron bunches with a high transverse brightness at energies of roughly 10 keV. This paper investigates the possibility of increasing the range of applications of this source by accelerating the bunch using radio frequency electromagnetic fields. Bunch energies up to 35 keV are measured by analyzing the diffraction patterns generated from a mono-crystalline gold sample. It is found that the normalized transverse emittance is largely preserved during acceleration.

Original languageEnglish
Article number054303
Number of pages8
JournalStructural Dynamics
Issue number5
Publication statusPublished - 1 Sept 2023


The author would like to thank E. Rietman, H. van Doorn, and H. van den Heuvel for their technical support and expertise. This publication is part of the project ColdLight: From laser-cooled atoms to coherent soft x-rays (with Project No. 741.018.303 of the research program ColdLight), which is (partly) financed by the Dutch company AccTec B.V. and the Dutch Research Council (NWO). J.V. Huijts is supported by the EC—Horizon Europe—Excellent Science—HORIZON EUROPE Marie Sklodowska-Curie Actions (No. 101066850) as well as Branco Weiss Fellowship—Society in Science, administered by the ETH Zürich.

FundersFunder number
Dutch company AccTec B.V.
EC—Horizon Europe—Excellent Science
Marie Skłodowska‐Curie101066850
Branco Weiss Fellowship – Society in Science
ETH Zurich
Nederlandse Organisatie voor Wetenschappelijk Onderzoek


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