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Multi-Wavelength High Order Harmonic Generation from Intense Laser Plasma Interactions

Creative Commons 'BY' version 4.0 license
Abstract

Advances in high intensity laser systems enable large energies to be delivered to targets simultaneously with kilohertz repetition rates, making laser driven x-ray sources much more accessible. However, the targets needed for full utilization of such sources are still lacking. This work will describe the process of x-ray generation via the high harmonic generation process and how high brightness can be achieved through macroscopic phase-matching. It will show the need for controllable target densities and share measurements of high brightness x-ray beams using carefully designed 3D printed gas cells. It will show how such a source can enable deep investigations into novel polarization and focusing schemes that have been unable to be observed before, such as the wavelength scaling of phase-matching for vector polarization states. Lastly, results from measurements from 400nm high-contrast drivers on laser-solid harmonics will be shown.

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