Letter | Published:

Real-time observation of laser-driven electron acceleration

Nature Physics volume 7, pages 543548 (2011) | Download Citation

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Abstract

Electron acceleration by laser-driven plasma waves1,2 is capableof producing ultra-relativistic, quasi-monoenergetic electron bunches3,4,5 with orders of magnitude higher accelerating gradients and much shorter electron pulses than state-of-the-art radio-frequency accelerators. Recent developments have shown peak energies reaching into the GeV range6 and improved stability and control over the energy spectrum and charge7. Future applications, such as the development of laboratory X-ray sources with unprecedented peak brilliance8,9 or ultrafast time-resolved measurements10 critically rely on a temporal characterization of the acceleration process and the electron bunch. Here, we report the first real-time observation of the accelerated electron pulse and the accelerating plasma wave. Our time-resolved study allows a single-shot measurement of the 5.8−2.1+1.9 fs electron bunch full-width at half-maximum (2.5−0.9+0.8 fs root mean square) as well as the plasma wave with a density-dependent period of 12–22 fs and reveals the evolution of the bunch, its position in the surrounding plasma wave and the wake dynamics. The results afford promise for brilliant, sub-ångström-wavelength ultrafast electron and photon sources for diffraction imaging with atomic resolution in space and time11.

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Change history

  • 21 March 2011

    In the version of this Letter originally published, the description of panels  c–i in the caption for Fig. 4 was incomplete. This error has now been corrected in all versions of the Letter.

References

  1. 1.

    & Laser electron accelerator. Phys. Rev. Lett. 43, 267–270 (1979).

  2. 2.

    & Laser wake field acceleration: The highly non-linear broken-wave regime. Appl. Phys. B 74, 355–361 (2002).

  3. 3.

    et al. Monoenergetic beams of relativistic electrons from intense laser-plasma interactions. Nature 431, 535–538 (2004).

  4. 4.

    et al. High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding. Nature 431, 538–541 (2004).

  5. 5.

    et al. A laser-plasma accelerator producing monoenergetic electron beams. Nature 431, 541–544 (2004).

  6. 6.

    et al. GeV electron beams from a centimetre-scale accelerator. Nature Phys. 2, 696–699 (2006).

  7. 7.

    et al. Controlled injection and acceleration of electrons in plasma wakefields by colliding laser pulses. Nature 444, 737–739 (2006).

  8. 8.

    , & Femtosecond X-rays from Thomson scattering using laser wakefield accelerators. Meas. Sci. Technol. 12, 1828–1834 (2001).

  9. 9.

    et al. Laser-driven soft-X-ray undulator source. Nature Phys. 5, 826–829 (2009).

  10. 10.

    et al. Direct imaging of transient molecular structures with ultrafast diffraction. Science 291, 458–462 (2001).

  11. 11.

    & Attosecond physics. Rev. Mod. Phys. 81, 163–234 (2009).

  12. 12.

    , , & Transverse-wake wave breaking. Phys. Rev. Lett. 78, 4205–4208 (1997).

  13. 13.

    , , , & Nonlinear theory for relativistic plasma wakefields in the blowout regime. Phys. Rev. Lett. 96, 165002 (2006).

  14. 14.

    et al. Measurements of wave-breaking radiation from a laser-wakefield accelerator. Phys. Rev. Lett. 98, 054802 (2007).

  15. 15.

    et al. Temporal characterization of femtosecond laser-plasma-accelerated electron bunches using terahertz radiation. Phys. Rev. Lett. 96, 014801 (2006).

  16. 16.

    et al. Temporal characteristics of monoenergetic electron beams generated by the laser wakefield acceleration. Phys. Rev. Spec. Top. Accel. Beams 10, 031301 (2007).

  17. 17.

    , , , & Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches. Opt. Lett. 33, 1186–1188 (2008).

  18. 18.

    et al. Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. Phys. Rev. Lett. 104, 084802 (2010).

  19. 19.

    et al. Snapshots of laser wakefields. Nature Phys. 2, 749–753 (2006).

  20. 20.

    et al. Formation of optical bullets in laser-driven plasma bubble accelerators. Phys. Rev. Lett. 104, 134801 (2010).

  21. 21.

    & Faraday-rotation measurements of megagauss magnetic fields in laser-produced plasmas. Phys. Rev. Lett. 34, 138–141 (1975).

  22. 22.

    et al. Measurement of magnetic-field structures in a laser-wakefield accelerator. Phys. Rev. Lett. 105, 115002 (2010).

  23. 23.

    Schlieren and Shadowgraph Techniques (Springer, 2001).

  24. 24.

    , & Bubble acceleration of electrons with few-cycle laser pulses. New J. Phys. 8, 186 (2006).

  25. 25.

    et al. Generation of sub-three-cycle, 16 TW light pulses by using noncollinear optical parametric chirped-pulse amplification. Opt. Lett. 34, 2459–2461 (2009).

  26. 26.

    et al. Observation of beam loading in a laser-plasma accelerator. Phys. Rev. Lett. 103, 194804 (2009).

  27. 27.

    et al. Stimulated Raman side scattering in laser wakefield acceleration. Phys. Rev. Lett. 105, 034801 (2010).

  28. 28.

    et al. Tomography of injection and acceleration of monoenergetic electrons in a laser-wakefield accelerator. Phys. Rev. Lett. 96, 095001 (2006).

  29. 29.

    et al. Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period. Phys. Rev. Lett. 96, 215001 (2006).

  30. 30.

    et al. Few-cycle laser-driven electron acceleration. Phys. Rev. Lett. 102, 124801 (2009).

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Acknowledgements

We thank M. Geissler for providing us with the ILLUMINATION code to perform the PIC simulations. This work is supported by DFG-Project Transregio TR18, by the Association EURATOM, Max-Planck-Institut für Plasmaphysik, by the Munich Centre for Advanced Photonics (MAP), by Laserlab-Europe/Labtech FP7 contract number 228334 and by the German Ministry of Education and Research (BMBF) under contract 03ZIK052. C.M.S.S. acknowledges the support of the Alexander von Humboldt Foundation. J.M.M. acknowledges the support of the Alexander von Humboldt Foundation and the Russian Foundation for Basic Research (RFBR), grant numbers 08-02-01245-a and 08-02-01137-a.

Author information

Affiliations

  1. Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany

    • Alexander Buck
    • , Karl Schmid
    • , Chris M. S. Sears
    • , Julia M. Mikhailova
    • , Ferenc Krausz
    •  & Laszlo Veisz
  2. Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748 Garching, Germany

    • Alexander Buck
    • , Karl Schmid
    •  & Ferenc Krausz
  3. Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, 07743 Jena, Germany

    • Maria Nicolai
    • , Alexander Sävert
    •  & Malte C. Kaluza
  4. Helmholtz-Institut Jena, Helmholtzweg 4, 07743 Jena, Germany

    • Malte C. Kaluza

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Contributions

A.B., M.N., K.S., C.M.S.S., A.S., M.C.K. and L.V. designed and carried out the experiments. A.B. and M.N. did the main data analysis. A.B. and J.M.M. performed the simulations. F.K., M.C.K. and L.V. provided overall guidance to the project. All authors discussed the results and contributed to the manuscript.

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The authors declare no competing financial interests.

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Correspondence to Alexander Buck or Laszlo Veisz.

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DOI

https://doi.org/10.1038/nphys1942

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