Effects of Target Profile on X-Rays Produced by Mono-Energetic Electrons Generated by Femtosecond Lasers

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Mahmoodkalayeh, Sadreddin | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45110 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Sadighi Bonabi, Rasoul
Abstract:
Considering the generation of quasi-monoenergetic electrons with femto-second Lasers, producing X-Rays using these electrons is of interest. Lately, higher efficiencies of x-ray generation have been demonstrated by bombardment of different metal slabs, with quasi-monoenergetic electrons instead of Maxwellian electrons. The goal of this research is to study how changing the geometry of the target will affect efficiency and angular distribution of generated X-rays. The electron source is defined using a theoretical model and experimental data. MCNP4C code has been utilized to simulate the collisions of these electrons with a metal target. Intensity and quality of generated X-Rays are obtained for targets with different geometries - Cylinder, spheroid, cone, truncated cone and an hourglass shape. The best shape proved to be an upside down spheroid and optimum size of this target is obtained. Additionally, angular distributions of all electrons and photons escaping the target have been studied
Keywords:
X Rays ; Quasi-Monoenergetic Electron ; Femtosecond Laser

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