Demonstration of self-truncated ionization injection for GeV electron beams

M. Mirzaie, S. Li, M. Zeng, N. A. M. Hafz, G. Y. Li, Q. J. Zhu, H. Liao, T. Sokollik, F. Liu, Y. Y. Ma, L. M. Chen, Z. M. Sheng, J. Zhang

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Ionization-induced injection mechanism was introduced in 2010 to reduce the laser intensity threshold for controllable electron trapping in laser wakefield accelerators (LWFA). However, usually it generates electron beams with continuous energy spectra. Subsequently, a dual-stage target separating the injection and acceleration processes was regarded as essential to achieve narrow energy-spread electron beams by ionization injection. Recently, we numerically proposed a self-truncation scenario of the ionization injection process based upon overshooting of the laser-focusing in plasma which can reduce the electron injection length down to a few hundred micrometers, leading to accelerated beams with extremely low energy-spread in a single-stage. Here, using 100 TW-class laser pulses we report experimental observations of this injection scenario in centimeter-long plasma leading to the generation of narrow energy-spread GeV electron beams, demonstrating its robustness and scalability. Compared with the self-injection and dual-stage schemes, the self-truncated ionization injection generates higher-quality electron beams at lower intensities and densities, and is therefore promising for practical applications.
LanguageEnglish
Article number14659
Number of pages9
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 1 Oct 2015

Fingerprint

electron beams
injection
ionization
lasers
continuous spectra
energy
micrometers
energy spectra
accelerators
electrons
trapping
thresholds
pulses
approximation

Keywords

  • plasma accelerators
  • GeV electron beams
  • laser pulses
  • electron beams

Cite this

Mirzaie, M., Li, S., Zeng, M., Hafz, N. A. M., Li, G. Y., Zhu, Q. J., ... Zhang, J. (2015). Demonstration of self-truncated ionization injection for GeV electron beams. Scientific Reports, 5, [14659]. https://doi.org/10.1038/srep14659
Mirzaie, M. ; Li, S. ; Zeng, M. ; Hafz, N. A. M. ; Li, G. Y. ; Zhu, Q. J. ; Liao, H. ; Sokollik, T. ; Liu, F. ; Ma, Y. Y. ; Chen, L. M. ; Sheng, Z. M. ; Zhang, J. / Demonstration of self-truncated ionization injection for GeV electron beams. In: Scientific Reports. 2015 ; Vol. 5.
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Mirzaie, M, Li, S, Zeng, M, Hafz, NAM, Li, GY, Zhu, QJ, Liao, H, Sokollik, T, Liu, F, Ma, YY, Chen, LM, Sheng, ZM & Zhang, J 2015, 'Demonstration of self-truncated ionization injection for GeV electron beams' Scientific Reports, vol. 5, 14659. https://doi.org/10.1038/srep14659

Demonstration of self-truncated ionization injection for GeV electron beams. / Mirzaie, M.; Li, S.; Zeng, M.; Hafz, N. A. M.; Li, G. Y.; Zhu, Q. J. ; Liao, H.; Sokollik, T.; Liu, F.; Ma, Y. Y.; Chen, L. M.; Sheng, Z. M.; Zhang, J.

In: Scientific Reports, Vol. 5, 14659, 01.10.2015.

Research output: Contribution to journalArticle

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AU - Mirzaie, M.

AU - Li, S.

AU - Zeng, M.

AU - Hafz, N. A. M.

AU - Li, G. Y.

AU - Zhu, Q. J.

AU - Liao, H.

AU - Sokollik, T.

AU - Liu, F.

AU - Ma, Y. Y.

AU - Chen, L. M.

AU - Sheng, Z. M.

AU - Zhang, J.

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AB - Ionization-induced injection mechanism was introduced in 2010 to reduce the laser intensity threshold for controllable electron trapping in laser wakefield accelerators (LWFA). However, usually it generates electron beams with continuous energy spectra. Subsequently, a dual-stage target separating the injection and acceleration processes was regarded as essential to achieve narrow energy-spread electron beams by ionization injection. Recently, we numerically proposed a self-truncation scenario of the ionization injection process based upon overshooting of the laser-focusing in plasma which can reduce the electron injection length down to a few hundred micrometers, leading to accelerated beams with extremely low energy-spread in a single-stage. Here, using 100 TW-class laser pulses we report experimental observations of this injection scenario in centimeter-long plasma leading to the generation of narrow energy-spread GeV electron beams, demonstrating its robustness and scalability. Compared with the self-injection and dual-stage schemes, the self-truncated ionization injection generates higher-quality electron beams at lower intensities and densities, and is therefore promising for practical applications.

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