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High-Brilliance Betatron Gamma-Ray Source

  • RADIATION GENERATION
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Abstract

The generation of synchrotron radiation in a near-critical density plasma in the regime of relativistic self-trapping of a propagating laser pulse is considered as applied to the XCELS [1] facility parameters. This propagation regime ensures the acceleration of electrons with an extremely large total charge (at a level of several tens of nanocoulombs) to gigaelectronvolt energies, which determines high brilliance of synchrotron radiation. On the basis of the calculation of retarded potentials, we study space–time and spectral–angular characteristics of secondary gamma-ray radiation. It is shown that XCELS laser pulses will make it possible to generate directed secondary radiation with a photon energy up to 10 MeV (and higher) and brilliance exceeding 1023 photons s–1 mm–2 mrad–2 (at Δλ/λ = 0.1%), which turns out to be greater than the brilliance of a bremsstrahlung gamma source for the same laser parameters. This opens up prospects for using a betatron source for phase-contrast microscopy of deeply shielded objects.

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Funding

This work was supported in part by the Ministry of Science and Higher Education of the Russian Federation (agreement no. 075-15-2021-1361), the Russian Foundation for Basic Research and Rosatom (grant no. 2021-00023), and the BASIS Foundation for the Development of Theoretical Physics (grant no. 22-1-3-28-1).

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    O. E. Vais, M. G. Lobok & V. Yu. Bychenkov

  2. Dukhov Automatics Research Institute (VNIIA), 127030, Moscow, Russia

    O. E. Vais, M. G. Lobok & V. Yu. Bychenkov

  3. Federal Research Center Institute of Applied Physics, Russian Academy of Sciences, 603950, Nizhny Novgorod, Russia

    O. E. Vais, M. G. Lobok & V. Yu. Bychenkov

Authors
  1. O. E. Vais
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  2. M. G. Lobok
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  3. V. Yu. Bychenkov
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Correspondence to O. E. Vais.

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The authors declare that they have no conflicts of interest.

Additional information

Translated by I. Ulitkin

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Vais, O.E., Lobok, M.G. & Bychenkov, V.Y. High-Brilliance Betatron Gamma-Ray Source. Bull. Lebedev Phys. Inst. 50 (Suppl 7), S806–S814 (2023). https://doi.org/10.3103/S1068335623190168

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  • DOI: https://doi.org/10.3103/S1068335623190168

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