Dino A. Jaroszynski

TL;DR: In this article, the number of photons measured is up to 9'×'106 per shot for a 100 period undulator, with a mean peak brilliance of 1'× '1018 photons/s/mrad2/mm2/0.1% bandwidth.

TL;DR: A novel scheme to efficiently produce collimated ultrabright γ-ray beams with photon energies tunable up to GeV by focusing a multi-petawatt laser pulse into a two-stage wakefield accelerator is presented.

TL;DR: The first experimental observation of limit-cycle power oscillations in a short-pulse free-electron laser is presented, due to a nonlinear modulation of the optical micropulse shape and phase by the electrons, which leads to the formation of a train of subpulses.

TL;DR: The results indicate that betatron X-rays from laser wakefield acceleration can provide an alternative to conventional synchrotron sources for high resolution imaging of eutectics and, more broadly, complex microstructures.

TL;DR: In this paper, it was shown that the localized charge density build-up in the sheath crossing region at the rear of the bubble has the effect of increasing the accelerating potential to above a critical value, which explains why single or multiple ultra short electron bunches with little dark current are formed in the first bubble.