2D-3D multiscale modelling of inhomogeneous plasma amplifiers

Abstract

Optical field ionized (OFI) plasma amplifiers have recently demonstrated sub-picosecond pulses when seeded with high order harmonics. In addition to this, the intensity and phase profile of the amplified harmonic beams carry information about possible plasma inhomogeneities (electron density, lasing ion abundance) that may appear in the amplifier. 1D and 3D modelling has played a fundamental role in these results and it will be required to support present and future experiments. This modelling involves different physical processes and time-scales, from the nanoseconds (hydrodynamics) to the picoseconds (atomic physics) and femtoseconds (dynamics of the amplified beam). Here we briefly present the different codes that have been coupled to fully model this process, from the creation of the plasma to the amplification of XUV and soft X-ray,s and show how this framework can be applied to study the impact of plasma inhomogeneities in the intensity and phase profile of the amplified beam.

Towards soft X-ray imaging: results in plasma-based lasers and plenoptic imaging

“…The 3D code DAGON, an update of the 1D DeepOne code, was developed to study the propagation regime of the HOH seed beam in plasma-based SXRLs. This simulation code accounts for and accurately describes the phenomena occurring when the HOH beam travels down the plasma channel, such as ASE, Rabi oscillations and, the most important case for study, the amplification of the seed beam [98], [52], [101].…”