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Journal Article

Extremely Dense Gamma-Ray Pulses in Electron Beam-Multifoil Collisions

MPS-Authors
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Sampath,  Archana
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Sangal,  Maitreyi
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Keitel,  Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Tamburini,  Matteo
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

Fulltext (public)

2009.01808.pdf
(Preprint), 4MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Sampath, A., Davoine, X., Corde, S., Gremillet, L., Gilljohann, M., Sangal, M., et al. (2021). Extremely Dense Gamma-Ray Pulses in Electron Beam-Multifoil Collisions. Physical Review Letters, 126(6): 064801. doi:10.1103/PhysRevLett.126.064801.


Cite as: http://hdl.handle.net/21.11116/0000-0008-05CB-E
Abstract
Sources of high-energy photons have important applications in almost all areas of research. However, the photon flux and intensity of existing sources is strongly limited for photon energies above a few hundred keV. Here we show that a high-current ultrarelativistic electron beam interacting with multiple submicrometer-thick conducting foils can undergo strong self-focusing accompanied by efficient emission of gamma-ray synchrotron photons. Physically, self-focusing and high-energy photon emission originate from the beam interaction with the near-field transition radiation accompanying the beam-foil collision. This near field radiation is of amplitude comparable with the beam self-field, and can be strong enough that a single emitted photon can carry away a significant fraction of the emitting electron energy. After beam collision with multiple foils, femtosecond collimated electron and photon beams with number density exceeding that of a solid are obtained. The relative simplicity, unique properties, and high efficiency of this gamma-ray source open up new opportunities for both applied and fundamental research including laserless investigations of strong-field QED processes with a single electron beam.