The spectacular development of Laser-Plasma Accelerators (LPA) appears very promising for a free electron laser application. The handling of the inherent properties of those LPA beams already allowed controlled production of LPA-based spontaneous undulator radiation. Stepping further, we here unveil that the forthcoming LPA-based seeded FELs will present singular spatio-spectral distributions. Relying on numerical simulations and simple analytical models, we show how those interferometric patterns can be exploited to retrieve, in single-shot, the spectro-temporal content and source point properties of the FEL pulses.
@article{arxiv.1906.11140,
title = {Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers},
author = {M. Labat and S. Bielawski and A. Loulergue and S. Corde and M. E. Couprie and E. Roussel},
journal= {arXiv preprint arXiv:1906.11140},
year = {2020}
}