Controlling the spectrum of x-rays generated in a laser-plasma accelerator by tailoring the laser wavefront
Plasma Physics
2015-05-14 v1 Accelerator Physics
Abstract
By tailoring the wavefront of the laser pulse used in a laser-wakefield accelerator, we show that the properties of the x-rays produced due to the electron beam's betatron oscillations in the plasma can be controlled. By creating a wavefront with coma, we find that the critical energy of the synchrotron-like x-ray spectrum can be significantly increased. The coma does not substantially change the energy of the electron beam, but does increase its divergence and produces an energy-dependent exit angle, indicating that changes in the x-ray spectrum are due to an increase in the electron beam's oscillation amplitude within the wakefield.
Keywords
Cite
@article{arxiv.0909.3440,
title = {Controlling the spectrum of x-rays generated in a laser-plasma accelerator by tailoring the laser wavefront},
author = {S. P. D. Mangles and G. Genoud and S. Kneip and M. Burza and K. Cassou and B. Cros and N. P. Dover and C. Kamperidis and Z. Najmudin and A. Persson and J. Schreiber and F. Wojda and C. G. Wahlstrom},
journal= {arXiv preprint arXiv:0909.3440},
year = {2015}
}
Comments
7 pages, 2 figures, submitted to Appl. Phys. Lett