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Proton Radiography for Inertial Confinement Fusion
L. Volpe,D. Batani,S. Baton,F. Perez,M. Koenig,Ph. Nicolai,B. Vauzour,J. J. Santos 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.51
Generation of high intensity and well collimated multi energetic proton beams from laser-matter interaction extend the possibility to use protons as a diagnostic to image imploding target in Inertial Confinement Fusion experiments in the framework of experimental road map of Hiper project (the European High Power laser Energy Research facility Project). Due to the very large mass densities reached during implosion processes, protons travelling through the target undergo a very large number of collisions which deviate protons from their original trajectory reducing Proton Radiography resolution below our expectations. Here We present a simple analytical model to study the Proton Radiography performance as a function of the main experimental parameters such as proton beam energy and target areal density. This approach leads to define two different criteria for PR resolution (called "strong" and "weak" condition) describing different experimental conditions.Finally numerical simulations using both Hydrodynamic and Monte Carlo codes are presented to validate analytical predictions.