14 May 2015 Analysis of electron injection in laser wakefield acceleration using betatron emission in capillary tubes
Author Affiliations +
Abstract
The dynamics of ionization-induced electron injection in the high density (~ 1:2 × 1019cm-3) regime of Laser Wakefield Acceleration (LWFA) was investigated by analyzing betatron X-ray emission inside dielectric capillary tubes. A comparative study of the electron and betatron X-ray properties was performed for both self-injection and ionization-induced injection. Direct experimental evidence of early onset of ionization-induced injection into the plasma wave was obtained by mapping the X-ray emission zone inside the plasma. Particle-In-Cell (PIC) simulations showed that the early onset of ionization-induced injection, due to its lower trapping threshold, suppresses self-injection of electrons. An increase of X-ray fluence by at least a factor of two was observed in the case of ionization-induced injection due to an increased trapped charge compared to self-injection mechanism.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
F. G. Desforges, B. S. Paradkar, M. Hansson, Thomas L. Audet, Jinchuan Ju, I. Gallardo-González, B. Aurand, P. Lee, Lovisa Senje, Anders Persson, Sandrine Dobosz-Dufrénoy, Olle Lundh, Gilles Maynard, Pascal Monot, Jean-Luc Vay, Claes-Göran Wahlström, Brigitte Cros, "Analysis of electron injection in laser wakefield acceleration using betatron emission in capillary tubes", Proc. SPIE 9514, Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III, 95140Z (14 May 2015); doi: 10.1117/12.2178654; https://doi.org/10.1117/12.2178654
PROCEEDINGS
11 PAGES


SHARE
Back to Top