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Efficiency of radiation friction losses in laser-driven ‘hole boring’ of dense targets

  Articoli su Riviste JCR/ISI  (anno 2019)

Autori:  Popruzhenko S. V. ,Liseykina T. V., Macchi A

Affiliazione Autori:  1) Max Planck Institute for the Physics of Complex Systems, Dresden, D-01187, Germany 2) National Research Nuclear University MEPhI, Moscow 115409, Russia 3) Institute of Physics, University of Rostock, D-18051 Rostock, Germany 4) On leave from Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia 5) CNR/INO (National Institute of Optics), Adriano Gozzini unit, I-56124 Pisa, Italy 6) Enrico Fermi Department of Physics, University of Pisa, largo Bruno Pontecorvo 3, I-56127 Pisa, Italy 7) Prokhorov General Physics Institute of the Russian Academy of Sciences, vavilova Str. 38, Moscow 119991, Russia

Riassunto:  In the interaction of laser pulses of extreme intensity (>10 23 Wcm −2 ) with high-density, thick plasma targets, simulations show significant radiation friction losses, in contrast to thin targets for which such losses are negligible. We present an analytical calculation, based on classical radiation friction modeling, of the conversion efficiency of the laser energy into incoherent radiation in the case when a circularly polarized pulse interacts with a thick plasma slab of overcritical initial density. By accounting for three effects including the influence of radiation losses on the single electron trajectory, the global ‘hole boring’ motion of the laser-plasma interaction region under the action of radiation pressure, and the inhomogeneity of the laser field in both longitudinal and transverse direction, we find a good agreement with the results of three-dimensional particle-in-cell simulations. Overall, the collective effects greatly reduce radiation losses with respect to electrons driven by the same laser pulse in vacuum, which also shift the reliability of classical calculations up to higher intensities.

Volume n.:  21      Pagine da: 033009-1  a: 033009-10
DOI: 10.1088/1367-2630/ab0119

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