• DOI:10.1038/ncomms2528
• Corpus ID: 3719267

Observation of longitudinal and transverse self-injections in laser-plasma accelerators

@article{Corde2013ObservationOL,
  title={Observation of longitudinal and transverse self-injections in laser-plasma accelerators},
  author={S{\'e}bastien Corde and C{\'e}dric Thaury and Agustin Lifschitz and Guillaume Lambert and K. Ta Phuoc and Xavier Davoine and R{\'e}mi Lehe and Denis Douillet and Antoine Rousse and Victor Malka},
  journal={Nature Communications},
  year={2013},
  volume={4}
}

• S. Corde, C. Thaury, +7 authors V. Malka
• Published 19 February 2013
• Physics
• Nature Communications

Laser-plasma accelerators can produce high-quality electron beams, up to giga electronvolts in energy, from a centimetre scale device. The properties of the electron beams and the accelerator stability are largely determined by the injection stage of electrons into the accelerator. The simplest mechanism of injection is self-injection, in which the wakefield is strong enough to trap cold plasma electrons into the laser wake. The main drawback of this method is its lack of shot-to-shot stability. Here we present experimental and numerical results that demonstrate the existence of two different self-injection mechanisms. Transverse self-injection is shown to lead to low stability and poor-quality electron beams, because of a strong dependence on the intensity profile of the laser pulse. In contrast, longitudinal injection, which is unambiguously observed for the first time, is shown to lead to much more stable acceleration and higher-quality electron beams. Laser-plasma accelerators can produce giga electronvolt energy electrons over centimetre scales, but their properties depend on the initial injection into the accelerator. Corde et al.study self-injection of electrons into the plasma wake and identify both transverse and longitudinal injection mechanisms.