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Bright X-ray radiation from plasma bubbles in an evolving laser wakefield accelerator

Research output: Contribution to journalJournal article

Published
  • M. S. Bloom
  • M. J. V. Streeter
  • S. Kneip
  • R. A. Bendoyro
  • O. Cheklov
  • J. M. Cole
  • A. Doepp
  • C. J. Hooker
  • J. Holloway
  • J. Jiang
  • N. C. Lopes
  • H. Nakamura
  • P. A. Norreys
  • P. P. Rajeev
  • D. R. Symes
  • J. Schreiber
  • J. C. Wood
  • M. Wing
  • Z. Najmudin
  • S. P. D. Mangles
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<mark>Journal publication date</mark>16/10/2017
<mark>Journal</mark>arXiv.org
Number of pages5
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

We show that the properties of the electron beam and bright X-rays produced by a laser wakefield accelerator can be predicted if the distance over which the laser self-focuses and compresses prior to self-injection is taken into account. A model based on oscillations of the beam inside a plasma bubble shows that performance is optimised when the plasma length is matched to the laser depletion length. With a 200~TW laser pulse this results in an X-ray beam with median photon energy of 20 keV, $> 10^{9}$ photons per shot and a peak brightness of $4 \times 10^{23}$ photons s$^{-1}$ mrad$^{-2}$ mm$^{-2}$ (0.1 % BW)$^{-1}$.

Bibliographic note

5 pages, 4 figures