Superradiant parametric x-ray emission

We compute a spectrum of parametric x-ray radiation inside a crystal from a bunch of electrons, which is periodically modulated in density. We consider that the bunch of electrons is exiting from an x-ray free-electron laser (XFEL) channel. We demonstrate that in the case of a resonance between the...

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Bibliographic Details
Published in:Physical review. Accelerators and beams 2022-12, Vol.25 (12), p.120702, Article 120702
Main Authors: Feranchuk, I. D., San, N. Q., Skoromnik, O. D.
Format: Article
Language:English
Subjects:
Emission
Free electron lasers
Modulation
Photons
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Summary:We compute a spectrum of parametric x-ray radiation inside a crystal from a bunch of electrons, which is periodically modulated in density. We consider that the bunch of electrons is exiting from an x-ray free-electron laser (XFEL) channel. We demonstrate that in the case of a resonance between the frequency of parametric x-ray radiation and a frequency of modulation of an electron bunch, the sequence of strong quasimonochromatic x-ray pulses is formed—superradiant parametric x-ray emission (SPXE) with frequencies that are multiples of the modulation frequency. The number of photons in the pulse of SPXE in the case of extremely asymmetric diffraction is comparable with the photon number in the pulse of an XFEL. Moreover, the SPXE is directed under the large angle to the electron velocity and every harmonic in the spectrum is emitted under its own angle.
ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.25.120702