12 May 2015 Gamma-ray production from resonant betatron oscillations of accelerated electrons in a plasma wakes
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Abstract
The laser-plasma wakefield accelerator is a novel ultra-compact particle accelerator. A very intense laser pulse focused onto plasma can excites plasma density waves. Electrons surfing these waves can be accelerated to very high energies with unprecedented accelerating gradients in excess of 1 GV/cm. While accelerating, electrons undergo transverse betatron oscillations and emit synchrotron-like x-ray radiation into a narrow on-axis cone, which is enhanced when electrons interact with the electromagnetic field of the laser. In this case, the laser can resonantly drive the electron motion, lading to direct laser acceleration. This occurs when the betatron frequency matches the Doppler down-shifted frequency of the laser. As a consequence, the number of photons emitted is strongly enhanced and the critical photon energy is increases to 100’s of keV.
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S. Cipiccia, S. Cipiccia, M. R. Islam, M. R. Islam, B. Ersfeld, B. Ersfeld, G. H. Welsh, G. H. Welsh, E. Brunetti, E. Brunetti, G. Vieux, G. Vieux, X. Yang, X. Yang, S. M. Wiggins, S. M. Wiggins, P. Grant, P. Grant, D. Reboredo Gil, D. Reboredo Gil, David W. Grant, David W. Grant, R. P. Shanks, R. P. Shanks, R. C. Issac, R. C. Issac, M. P. Anania, M. P. Anania, D. Maneuski, D. Maneuski, R. Montgomery, R. Montgomery, G. Smith, G. Smith, M. Hoek, M. Hoek, D. Hamilton, D. Hamilton, D. Symes, D. Symes, P. P Rajeev, P. P Rajeev, Val O'Shea, Val O'Shea, J. M. Dias, J. M. Dias, N. R.C. Lemos, N. R.C. Lemos, Dino A. Jaroszynski, Dino A. Jaroszynski, } "Gamma-ray production from resonant betatron oscillations of accelerated electrons in a plasma wakes", Proc. SPIE 9512, Advances in X-ray Free-Electron Lasers Instrumentation III, 95121A (12 May 2015); doi: 10.1117/12.2181566; https://doi.org/10.1117/12.2181566
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