Demonstration of self-truncated ionization injection for GeV electron beams

• DOI: 10.1038/srep14659
• Publication Date: 2015-10-01T09:12:36Z
• Authors: M. Mirzaie; S. Li; M. Zeng; N. A. M. Hafz; M. Chen; G. Y. Li; Q. J. Zhu; H. Liao; T. Sokollik; F. Liu; Y. Y. Ma; L.M. Chen; Z. M. Sheng; J. Zhang
• Keywords: Impact ionization

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