Abstract:
:Near-critical plasmas irradiated at ultra-high laser intensities (I > 1018W/cm2) allow to improve the performances of laser-driven particle and radiation sources and to explore scenarios of great astrophysical interest. Near-critical plasmas with controlled properties can be obtained with nanostructured low-density materials. By means of 3D Particle-In-Cell simulations, we investigate how realistic nanostructures influence the interaction of an ultra-intense laser with a plasma having a near-critical average electron density. We find that the presence of a nanostructure strongly reduces the effect of pulse polarization and enhances the energy absorbed by the ion population, while generally leading to a significant decrease of the electron temperature with respect to a homogeneous near-critical plasma. We also observe an effect of the nanostructure morphology. These results are relevant both for a fundamental understanding and for the foreseen applications of laser-plasma interaction in the near-critical regime.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Fedeli L,Formenti A,Cialfi L,Pazzaglia A,Passoni Mdoi
10.1038/s41598-018-22147-6subject
Has Abstractpub_date
2018-03-01 00:00:00pages
3834issue
1issn
2045-2322pii
10.1038/s41598-018-22147-6journal_volume
8pub_type
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