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Nanoclusters and nanoscale voids as possible sources of increasing dark current in high-gradient vacuum breakdown

  • Regular Article – Atomic Physics
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Abstract

The potential barrier model considering an additional current that can lead to the high-gradient breakdowns in accelerating structures is proposed. An oscillatory resonance feature of the field emission current from a double-layer metal system with a nanoscale coating is shown. The double potential barrier was used for calculations of the field emission current density value. The presence of resonant properties of the field emission current density of a double-layer metal system with a nanometric coating is revealed. The field emission current increasing more than 5 times (for the constant value of an electric field strength \(E=5 ~GV/m\)) when considering not ideal copper surface with the presence of nanoclusters on the surface of or nanoscale voids in the near-surface layer is observed.

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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data generated during this study are contained in this published article].

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Acknowledgements

The publication is based on the research provided by the grant support of the National Academy of Sciences of Ukraine (NASU) for research laboratories/groups of young scientists of the National Academy of Sciences of Ukraine to research priority areas of development of science and technology in 2021–2022 under contract No 16/01-2021 (3). The authors thank O.P. Novak for helpful discussions on the paper.

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Authors and Affiliations

  1. Institute of Applied Physics, National Academy of Sciences of Ukraine, Petropavlivska str. 58, Sumy, 40000, Ukraine

    I. I. Musiienko, S. O. Lebedynskyi & R. I. Kholodov

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  1. I. I. Musiienko
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  2. S. O. Lebedynskyi
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  3. R. I. Kholodov
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All the authors were involved in the preparation of the manuscript. All the authors have read and approved the final manuscript.

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Correspondence to I. I. Musiienko.

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Musiienko, I.I., Lebedynskyi, S.O. & Kholodov, R.I. Nanoclusters and nanoscale voids as possible sources of increasing dark current in high-gradient vacuum breakdown. Eur. Phys. J. D 76, 68 (2022). https://doi.org/10.1140/epjd/s10053-022-00394-7

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  • DOI: https://doi.org/10.1140/epjd/s10053-022-00394-7

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