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An estimation method of surface defects of LMJ microshells

Abstract : This article presents a radiographic characterization method for microshells. In the LMJ (Laser Mega-Joule) framework, microshells are tiny plastic objects used in power laser experiments of inertial fusion. These microshells are characterized by low energy radiography. On the microshell radiographs, a phenomenon of phase contrast is observed. The origin of this phenomenon has been identied as sharp variation of amplitude due to refraction. Theoretical model links pixel information with microshell geometry. These points are used for a contour detection. Finally, an estimation of surface defects described by spherical harmonics is done.
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Contributor : Nicolas Boizot Connect in order to contact the contributor
Submitted on : Friday, April 20, 2018 - 11:00:44 AM
Last modification on : Wednesday, November 3, 2021 - 5:49:53 AM


  • HAL Id : hal-01772211, version 1



Vincent Dutto, A. Choux, Francesca Chittaro, Eric Busvelle, Jean-Paul Gauthier. An estimation method of surface defects of LMJ microshells. 2018. ⟨hal-01772211⟩



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