Speaker
Description
As part of the EuPRAXIA project[1], the objective of the PALLAS project is to produce an electron beam at 200 MeV, 30 pC with less than 5% energy spread and lower than 2μm normalised emittance using the IJCLAB-LaseriX laser driver at 10 Hz, 1.5 J and 35 fs. Based on available publications[2,3], we propose a two-chamber gas plasma target with a dopant localised in the first chamber. We then perform on-bench calibrated compressible simulations with the code OpenFOAM to predict the density profile. The result is then used as input for two massive random scans and a Bayesian optimisation with SMILEI fast Particle-in-Cell (PIC) simulation varying four input parameters: focal position, laser intensity, dopant concentration and inlet pressure. We further investigate the stability of the optimal working points. The massive amount of PIC results is left as open-source data for further investigation by the scientific community. Such a process can serve as the basis for any input parameters optimisation of a laser-plasma electron source target.
Footnotes
[1] Assmann et al. Eur. Phys. J. Spec. Top. 229, (2020)
[2] Lee et al. PRAB 19 112802 (2016); Golovin et al. PRAB 18, 011301 (2015)
[3] Jalas et al. PRL 126, 104801 (2021); Kirchen et al. PRL 126, 174801 (2021)
Funding Agency
ANR/PIA3-PACIFICS, CNRS/IN2P3, Université Paris Saclay
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