By the same authors

X-UV imaging of indirectly driven foam-foil packages

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

  • J. Pasley
  • P. Nilson
  • L. Willingale
  • M. G. Haines
  • M. Notley
  • M. Tolley
  • D. Neely
  • W. Nazarov
  • O. Willi

Department/unit(s)

Publication details

Title of host publicationInertial Fusion Sciences and Applications 2003
DatePublished - 1 Dec 2004
Pages498-501
Number of pages4
EditorsB.A. Hammel, D.D. Meyerhofer, J. Meyer-ter-Vehn
Original languageEnglish

Abstract

We report upon recent results taken at the Vulcan Laser Facility (Rutherford AppletonLaboratory) confirming earlier results obtained at CEA Limeil illustrating the efficacy of utilising a combination of transonic and subsonic ablation to increase the impulse delivered to an indirectly driven payload. X-UV imaging has been utilised to map the trajectory of the rear surface of an accelerating payload driven by hohlraum with energy density equivalent radiation temperature of between 120 and 150eV. Payloads comprising an approximately 30μm thick solid density plastic foil doped with chlorine, both with and without a gold flashing on the driver facing surface, were accelerated by a combination of subsonic x-ray ablation of the rear surface of the payload and either subsonic, transonic or supersonic ablation in a hohlraum facing low density foam layer in intimate contact with the payload. It was observed that the maximum impulse was delivered in the case where the ablation wave propagation was transonic in the foam layer. In such cases the impulse delivered to the payload was significantly greater than that achieved by direct (subsonic) ablation of the payload.

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