Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator
Accelerator Physics
2018-10-31 v3 Plasma Physics
Abstract
The injection of electrons into a laser wakefield accelerator (LWFA) is observed to generate an intense coherent ultra-broadband and ultrashort pulse radiation flash, consistent with the acceleration of electrons from rest to nearly the speed of light in a distance < ~ 1 m. The flash is sufficiently bright to induce large nonlinear refractive index shifts in optical materials; we estimate a source brightness temperature of ~ K. We present measurements of the flash spectra, coherence, pulse duration, polarization and angular distribution, providing a detailed picture of electron injection dynamics in LWFA. These are characteristic of laser-assisted injection of off-axis electrons, which preserves wake coherence.
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Cite
@article{arxiv.1807.04165,
title = {Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator},
author = {B. Miao and L. Feder and J. Elle and A. J. Goers and D. Woodbury and F. Salehi and J. K. Wahlstrand and H. M. Milchberg},
journal= {arXiv preprint arXiv:1807.04165},
year = {2018}
}
Comments
12 pages, 5 figures