Sep 24 – 30, 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

High-brilliance betatron gamma-ray source powered by laser-accelerated electrons

Sep 26, 2017, 4:36 PM
SML, Sala Maria Luisa, HH

SML, Sala Maria Luisa, HH

talk WG1 - Electron Beams from Plasmas WG1_Parallel


Dr Julien Ferri (Chalmers University of Technology)


Thanks to the recent progress in laser-driven plasma acceleration of electrons, the ultra-short, compact and spatially coherent X-ray betatron sources based on this technique have been successfully applied to high-resolution imaging in the last few years. However, due to a difficulty to both optimize the electron energy and wiggling, the scope of the betatron sources is limited by a low energy efficiency and a photon energy in the 10's of keV range. Here, based on three-dimensional particle-in-cell simulations, we propose an original hybrid scheme that combines a low-density laser-driven plasma accelerator with a high-density beam-driven plasma radiator. We show that this scheme greatly improves the energy efficiency, with about 1% of the laser energy transferred to the radiation, and that the gamma-ray photon energy exceeds the MeV range when using a 15 J laser pulse. This high-brilliance hybrid betatron source opens the way to a wide range of applications requiring MeV photons, such as the production of medical isotopes with photo-nuclear reactions, radiography of dense objects in the defense or industrial domains and imaging in nuclear physics.

Primary author

Dr Julien Ferri (Chalmers University of Technology)


Dr Agustin Lifschitz (Laboratoire d'Optique Appliquée) Dr Andreas Döpp (LMU / MPQ) Mr Antoine Doche (Laboratoire d'Optique Appliquée, Ecole Polytechnique-Ensta, France) Dr Benoit Mahieu (Laboratoire d'Optique Appliquée) Dr Cédric Thaury (Laboratoire d'Optique Appliquée) Dr Igor Andriyash (Synchrotron Soleil) Prof. Sébastien Corde (Ecole Polytechnique) Prof. Victor Malka (LOA) Dr Xavier Davoine (CEA DAM DIF) Dr kim TA PHUOC (LOA)

Presentation materials