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Journal Articles Physics of Plasmas Year : 2011

Proton radiography of laser-driven imploding target in cylindrical geometry

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L. Volpe
  • Function : Author
Ph Nicolai
  • Function : Author
C. Regan
  • Function : Author
K. Lancaster
  • Function : Author
Ch Spindloe
  • Function : Author
P. Koester
  • Function : Author
C. Benedetti
  • Function : Author
M. Richetta
  • Function : Author
J. Pasley
  • Function : Author
F. Beg
  • Function : Author
D. P. Higginson
  • Function : Author
A. G. Macphee
  • Function : Author

Abstract

An experiment was done at the Rutherford Appleton Laboratory (Vulcan laser petawatt laser) to study fast electron propagation in cylindrically compressed targets, a subject of interest for fast ignition. This was performed in the framework of the experimental road map of HiPER (the European high power laser energy research facility project). In the experiment, protons accelerated by a picosecond-laser pulse were used to radiograph a 220 mu m diameter cylinder (20 mu m wall, filled with low density foam), imploded with similar to 200 J of green laser light in four symmetrically incident beams of pulse length 1 ns. Point projection proton backlighting was used to get the compression history and the stagnation time. Results are also compared to those from hard x-ray radiography. Detailed comparison with two-dimensional numerical hydrosimulations has been done using a Monte Carlo code adapted to describe multiple scattering and plasma effects. Finally we develop a simple analytical model to estimate the performance of proton radiography for given implosion conditions.

Dates and versions

hal-01561852 , version 1 (13-07-2017)

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Cite

L. Volpe, D. Batani, B. Vauzour, Ph Nicolai, J. J. Santos, et al.. Proton radiography of laser-driven imploding target in cylindrical geometry. Physics of Plasmas, 2011, 18 (1), ⟨10.1063/1.3530596⟩. ⟨hal-01561852⟩
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