The European Physical Journal D

, 67:205

Polar direct drive illumination uniformity provided by the Orion facility

Authors

    • Centre de Mathématiques et de Leurs Applications, ENS Cachan and CNRS
  • Benoit Canaud
    • CEA, DIF
  • Warren J. Garbett
    • AWE plc
  • Franck Philippe
    • CEA, DIF
  • Rafael Ramis
    • ETSI AeronáuticosUniversidad Politécnica de Madrid
Regular Article

DOI: 10.1140/epjd/e2013-40362-4

Cite this article as:
Temporal, M., Canaud, B., Garbett, W.J. et al. Eur. Phys. J. D (2013) 67: 205. doi:10.1140/epjd/e2013-40362-4

Abstract

The ten long-pulse laser beams of the Orion facility have been considered as a direct driver for the irradiation of a spherical capsule. The intrinsic root-mean-square illumination non-uniformity σ0 has been evaluated assuming circular and elliptical super-Gaussian laser intensity profiles. Calculations accounting for nominal uncertainties in power imbalance, pointing error and target positioning have shown a degradation of the irradiation uniformity. Non-uniformity of the irradiation as a function of the capsule radius has been calculated and it has been shown that the use of the polar direct drive technique significantly improves the quality of the irradiation. Finally, it is found that an elliptical focal shape provides better symmetry results in comparison to circular ones, whilst the laser-capsule coupling is reduced.

Keywords

Plasma Physics

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013