Recent advances in laser-plasma-based soft x-ray lasers

Stéphane Sebban

doi:10.1117/12.2665577

8 June 2023 Recent advances in laser-plasma-based soft x-ray lasers

Stéphane Sebban

Proceedings Volume PC12582, Compact Radiation Sources from EUV to Gamma-rays: Development and Applications; PC1258201 (2023) https://doi.org/10.1117/12.2665577
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

Intense and short soft X-ray light pulses offer unprecedented possibilities for studying ultrafast phenomena in matter at the nanometer scale. Plasma-based soft X-ray lasers (SXRLs) have the advantage of being compact sources. We report recent achievement aiming to demonstrate the control and reduction of duration of a seeded collisional soft X- ray laser induced by the anticipated interruption of the gain lifetime at high densities. By controlling the peak intensity velocity of an ultrashort beam by spatio-temporal couplings we improve the performances of a seeded soft X-ray laser (SXRL), which intrinsically suffers from the group velocity (vg) mismatch between the infrared pump beam used to generate the plasma amplifier and the XUV seed. The energy extraction was measured to raise from 19 to 59% when the pump vg ranges from 0.55c to 1.05c. We also demonstrate that the SXRL pulse duration is governed by the pump beam velocity and can be maintained constant along its propagation, resulting in energetic pulses as short as 450 fs. The measurements, in good agreement with simulations from a 3D Maxwell-Bloch code, have been performed thanks to an original method allowing to recover the temporal profile of any kind of soft X-ray laser pulse in single-shot operation.

Conference Presentation

Citation Download Citation

Stéphane Sebban "Recent advances in laser-plasma-based soft x-ray lasers", Proc. SPIE PC12582, Compact Radiation Sources from EUV to Gamma-rays: Development and Applications, PC1258201 (8 June 2023); https://doi.org/10.1117/12.2665577

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KEYWORDS

X-ray lasers

Extreme ultraviolet

Infrared radiation

Laser beam propagation

Optical simulations

Plasma

Plasma generation

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