Proton radiography of cylindrical laser-driven implosions

Year: 2011

Authors: Volpe L., Jafer R., Vauzour B., Nicolai P., Santos JJ., Dorchies F., Fourment C., Hulin S., Regan C., Perez F., Baton S., Lancaster K., Galimberti M., Heathcote R., Tolley M., Spindloe C., Nazarov W., Koester P., Labate L., Gizzi L.A., Benedetti C., Sgattoni A., Richetta M., Pasley J., Beg FN., Chawla S., Higginson D.P., MacKinnon A., MacPhee AG., Batani D.

Autors Affiliation: Univ Milano Bicocca, Milan, Italy; Univ Bordeaux, CELIA, CNRS, CEA, F-33405 Talence, France; Ecole Polytech CNRS UPMC, LULI, F-91128 Palaiseau, France; Univ St Andrews, St Andrews KY16 9AJ, Fife, Scotland; INO CNR, Pisa, Italy; Univ Bologna, I-40126 Bologna, Italy; Univ Roma Tor Vergata, Rome, Italy; Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England; Univ Calif San Diego, UCSD, La Jolla, CA 92093 USA; LLNL, Livermore, CA 94550 USA.

Abstract: We report on the results of a recent experiment at the Rutherford Appleton Laboratory investigating fast electron propagation in cylindrically compressed targets; a subject of interest for fast ignition. This experiment was performed within the framework of the road map of HiPER (the European High Power laser Energy Research facility Project). Protons accelerated by a ps-laser pulse are used to radiograph a 220 mu m diameter, imploded with similar to 200 J of laser light (1 ns lambda = 0.53 mu m) in four symmetrically incident beams. Results are also compared with those from hard x-ray radiography. Detailed comparison with 2D radiation hydrodyamics simulations is performed with the aid of a Monte Carlo code adapted to describe plasma effects. Finally, a simple analytical model is developed to estimate the performance of proton radiography for given implosion conditions.

Journal/Review: PLASMA PHYSICS AND CONTROLLED FUSION

Volume: 53 (3)      Pages from: 32003-1  to: 32003-9

More Information: The authors acknowledge the support of the HiPER project and Preparatory Phase Funding Agencies (EC, MSMT and STFC) in undertaking this work.
KeyWords: Fast electrons; Hard-x-ray radiography; Incident beams; Laser-driven implosions; Monte Carlo codes; Plasma effects; Proton radiography; Rutherford appleton laboratories
DOI: 10.1088/0741-3335/53/3/032003

Citations: 10
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