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Effect of experimental laser imperfections on laser wakefield acceleration and betatron source
Abstract : Laser pulses in current ultra-short TW systems are far from being ideal Gaussian beams. The influence of the presence of non-Gaussian features of the laser pulse is investigated here from experiments and 3D Particle-in-Cell simulations. Both the experimental intensity distribution and wavefront are used as input in the simulations. It is shown that a quantitative agreement between experimental data and simulations requires to use realistic pulse features. Moreover, some trends found in the experiments, such as the growing of the X-ray signal with the plasma length, can only be retrieved in simulations with realistic pulses. The performances on the electron acceleration and the synchrotron X-ray emission are strongly degraded by these non-Gaussian features, even keeping constant the total laser energy. A drop on the X-ray photon number by one order of magnitude was found. This clearly put forward the limitation of using a Gaussian beam in the simulations.
Cited literature [34 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-01337403
Contributor : Sébastien Corde <>
Submitted on : Saturday, June 25, 2016 - 9:33:05 PM
Last modification on : Thursday, May 7, 2020 - 10:46:06 PM
Document(s) archivé(s) le : Monday, September 26, 2016 - 10:37:19 AM
Contributor : Sébastien Corde <>
Submitted on : Saturday, June 25, 2016 - 9:33:05 PM
Last modification on : Thursday, May 7, 2020 - 10:46:06 PM
Document(s) archivé(s) le : Monday, September 26, 2016 - 10:37:19 AM
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2016_Ferri_SciRep.pdf
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