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Observation of laser power amplification in a self-injecting laser wakefield accelerator

Research output: Contribution to journalJournal article

Forthcoming
  • M. J. V. Streeter
  • S. Kneip
  • M. S. Bloom
  • R. A. Bendoyro
  • O. Chekhlov
  • A. E. Dangor
  • A. Döpp
  • C. J. Hooker
  • J. Holloway
  • J. Jiang
  • N. C. Lopes
  • H. Nakamura
  • P. A. Norreys
  • C. A. J. Palmer
  • P. P. Rajeev
  • J. Schreiber
  • D. R. Symes
  • M. Wing
  • S. P. D. Mangles
  • Z. Najmudin
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<mark>Journal publication date</mark>24/04/2018
<mark>Journal</mark>Physical Review Letters
<mark>State</mark>Accepted/In press
<mark>Original language</mark>English

Abstract

We report on the depletion and power amplification of the driving laser pulse in a strongly-driven laser wakefield accelerator. Simultaneous measurement of the transmitted pulse energy and temporal shape indicate an increase in peak power from $187 \pm 11$TW to a maximum of $318 \pm 12$ TW after 13 mm of propagation in plasma density of $0.9 \times 10^{18}$ cm$^{-3}$. The power amplification is correlated with the injection and acceleration of electrons in the non-linear wakefield. This process is modeled by including localized redshifting and subsequent group delay dispersion at the laser pulse front.

Bibliographic note

6 pages, 3 figures. To be submitted to PRL