Gamma-ray production from resonant betatron oscillations of accelerated electrons in a plasma wake

Silvia Cipiccia, Mohammad Islam, Bernhard Ersfeld, Gregor Welsh, Enrico Brunetti, Gregory Vieux, Xue Yang, Samuel Wiggins, Peter Anderson Grant, David Reboredo Gil, David William Grant, Richard Shanks, Riju Issac, Maria Pia Anania, Dzmitry Maneuski, Rachel Montgomery, Gary Smith, Matthias Hoek, David J. Hamilton, Dan SymesPattathil P. Rajeev, V. O'Shea, João M. Dias, Nuno R. C. Lemos, Dino Jaroszynski

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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
Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationAdvances in X-ray Free-Electron Lasers Instrumentation III
EditorsSandra G. Biedron
Number of pages9
Volume9512
DOIs
Publication statusPublished - 13 Apr 2015
EventAdvances in X-ray Free-Electron Lasers Instrumentation III - Clarion Congress Hotel, Prague, Czech Republic
Duration: 13 Apr 201516 Apr 2015

Conference

ConferenceAdvances in X-ray Free-Electron Lasers Instrumentation III
CountryCzech Republic
CityPrague
Period13/04/1516/04/15

Keywords

  • electrons
  • particle accelerators
  • doppler effect
  • photons
  • lasers
  • plasmas
  • gamma radiation
  • radiation
  • synchrotrons
  • X-rays

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