Development of a next generation of coherent light sources based on laser-plasma accelerators (LPA) is one of the goal of EuPRAXIA. GeV-level LPA electron beams, obtained experimentally by many teams around the world, can be considered as a potential drivers for a free-electron laser (FEL) to develop a compact LPA-based FEL delivering coherent, high-peak brightness beams of electromagnetic radiations for many applications. The Project is aiming to optimize electron beam parameters for the FEL application from a laser-plasma interaction area up to an undulator line, including a dedicated electron beam line. The FEL regime requires preservation of the high-quality of the LPA electron beam by using a combination of advanced all-optical and conventional electromagnetic systems.

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The Fellow will study a parameter space of the laser-plasma acceleration and the advanced electron beam transport in order to get the deliver the high-quality electron beam to the undulator line. The Fellow will model the FEL dynamics for both self-amplified spontaneous emission and seeded cases in order to reach saturation of the photon beam energy for soft and hard X-ray cases.

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The Fellow will contribute to an upgrade of the existing experimental technology at ELI-Beamlines, including the diagnostics of the electron and photon beams, as well as an external seeding using a high-harmonic generation (HHG) signal, in collaboration with Fellows from the “Laser-Plasma” and “Applications” work packages. The challenges in the diagnostics and manipulations with the electron beam parameters in the 6D phase-space, required for the LPA-based FEL, will be shared with other Fellows in the frame of the EuPRAXIA-DN work packages.

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The experimental activity will be carried out at ELI-Beamlines in cooperation with other partners in these work-packages.

The Fellow will work closely with INFN and other EuPRAXIA consortium members on the overall design optimization. The Fellow will have access to the wide-ranging EuPRAXIA training program which will include several international schools and workshops on plasma accelerator science and technology, as well as complimentary skills.