3 years ago

Collimated Ultra-Bright Gamma-Rays from a PW-Laser-Driven Wire Wiggler.

P. Gibbon, L.-M. Chen, W.-M. Wang, Y.-T. Li, J. Zhang, Z.-M. Sheng

It is shown by three-dimensional QED particle-in-cell simulation that as a laser pulse of 2.5 PW propagates along a sub-wavelength-wide solid wire, directional synchrotron $\gamma-$rays along the wire surface can be efficiently generated. With 8\% energy conversion from the pulse, the $\gamma-$rays contains $10^{12}$ photons between 5 and 500 MeV within 10-femtosecond duration, corresponding to peak brilliance of $10^{27}$ photons ${\rm s^{-1}~ mrad^{-2}~ mm^{-2}}$ per 0.1\% bandwidth. The brilliance and photon energy are respectively 5 orders and 3 orders of magnitude higher than those for a typical synchrotron radiation facility. The radiation is attributed to the generation of nC, GeV electron beams well guided along the wire surface and their wiggling motion in the strong electrostatic and magnetostatic fields induced at the high-density-wire surface, where QED effects become significant. This scheme works well with the laser power ranging from 0.5 PW to 5 PW available currently.

Publisher URL: http://arxiv.org/abs/1710.11356

DOI: arXiv:1710.11356v1

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