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Proceedings Paper

Laser-driven Thomson scattering for the generation of ultra-bright multi-MeV gamma-ray beams
Author(s): Gianluca Sarri; Darragh J. Corvan; Jason M. Cole; William Schumaker; Antonino Di Piazza; Hamad Ahmed; Mark Yeung; Zu Zhao; Christopher Harvey; Christoph H. Keitel; Karl Krushelnick; Stuart P. D. Mangles; Zulfikar Najmudin; Alexander G. R. Thomas; Matthew Zepf
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Paper Abstract

Compact γ-ray sources are of key importance not only for fundamental research but also for paramount practical applications such as cancer radiotherapy, active interrogation of materials, and high-energy radiography. Particular characteristics are required for meaningful implementation: multi-MeV energies per photon, a high degree of collimation, and a high peak brilliance. Laser-driven sources are theoretically expected to deliver such capabilities but experiments to date have reported either sub-MeV photon energies, or relatively low brilliance. By entering the non-linear regime of Thomson scattering, we report here on the first experimental realisation of a compact laser-driven γ-ray source that simultaneously ensures ultra-high brilliance (≈1019 photons s-1 mm-2 mrad-2 0.1% BW), low divergence (≈ mrad), and high photon energy (up to 18 MeV). The reported brilliance exceeds by two orders of magnitudes those of alternative mechanisms and it is the highest ever achieved in the multi-MeV regime in a laboratory experiment.

Paper Details

Date Published: 14 May 2015
PDF: 5 pages
Proc. SPIE 9514, Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III, 95140W (14 May 2015); doi: 10.1117/12.2182569
Show Author Affiliations
Gianluca Sarri, The Queen's Univ. Belfast (United Kingdom)
Darragh J. Corvan, The Queen's Univ. Belfast (United Kingdom)
Jason M. Cole, Imperial College of Science, Technology, and Medicine (United Kingdom)
William Schumaker, Univ. of Michigan (United States)
Antonino Di Piazza, Max-Planck-Institut für Kernphysik (Germany)
Hamad Ahmed, The Queen's Univ. Belfast (United Kingdom)
Mark Yeung, Helmholtz Institute Jena (Germany)
Zu Zhao, Univ. of Michigan (United States)
Christopher Harvey, The Queen's Univ. Belfast (United Kingdom)
Christoph H. Keitel, Max-Planck-Institut für Kernphysik (Germany)
Karl Krushelnick, Univ. of Michigan (United States)
Stuart P. D. Mangles, Imperial College of Science, Technology, and Medicine (United Kingdom)
Zulfikar Najmudin, Imperial College of Science, Technology, and Medicine (United Kingdom)
Alexander G. R. Thomas, Univ. of Michigan (United States)
Matthew Zepf, The Queen's Univ. Belfast (United Kingdom)
Helmholtz Institute Jena (Germany)


Published in SPIE Proceedings Vol. 9514:
Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III
Kenneth W. D. Ledingham; Eric Esarey; Carl B. Schroeder; Klaus Spohr; Paul McKenna; Florian J. Grüner; Paul R. Bolton, Editor(s)

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