Gamma-rays carrying orbital angular momenta produced by non-linear inverse Thomson scattering

ORAL

Abstract

We theoretically show that gamma-rays carrying orbital angular momenta (OAM) are produced by nonlinear inverse Thomson scattering. High energy electrons in intense circularly polarized light field undergo helical trajectories and radiate harmonic photons possessing helical phase structure and carrying OAM. This novel radiation mechanism would be the basis of OAM photon sources in high energy accelerators and, moreover, in various astrophysical environments. We show some numerical examples. Interactions of high energy OAM photons with atoms and nuclei may trigger new phenomena, which would open new research opportunities in nuclear physics, high energy physics and astrophysics.

REFERENCES
Y. Taira, T. Hayakawa, M. Katoh, Sci. Rep. 7, 5018 (2017)
M. Katoh, et al., Phys. Rev. Lett. 118, 094801 (2017)
M. Katoh et al., Sci. Rep. 7, 6130 (2017)
Y. Taira, M. Katoh, Astrophys. J., 860: 45 (2018)

*This work was supported by JSPS Overseas Research Fellowships and JSPS KAKENHI Grant Number 18H03477 and 17H01075.

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Presenters

  • Masahiro Katoh

    • Institute for Molecular Science

Authors

  • Yoshitaka Taira

    • National Institute of Advanced Industrial Science and Technology (AIST)

  • Masahiro Katoh

    • Institute for Molecular Science