Essays about: "XAS"

Found 4 essays containing the word XAS.

  1. 1. Multi-spectral X-ray imaging with a laser-plasma accelerator

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Andrea Angella; [2022]
    Keywords : Multi-spectral imaging; single-photon counting; X-ray absorption spectroscopy; XAS; LWFA; laser-wakefield acceleration; K-edge; imaging; metal-detection algorithm; Physics and Astronomy;

    Abstract : This master thesis focuses on the creation of an algorithm to perform multispectral imaging of a metallic target using X-rays. The generation of an ultrashort high-power low-divergent X-ray beam is performed by means of a Ti:Sapphire laser driven wake-field plasma accelerator. READ MORE

  3. 2. Design of an In-situ cell, for hard X-ray spectroscopy of surfaces used in high-pressure and high-temperature experiments : Design av en In-situ cell för intensiv röntgenspektroskopi i högtryck- högtemperaturexperiment

    University essay from Malmö universitet/Institutionen för materialvetenskap och tillämpad matematik (MTM)

    Author : David Zamora Torres; Felix Abeln; [2021]
    Keywords : In-situ cell; x-ray; XAS; x-ray absorption spectroscopy; XAFS; FEM; Finite element method; In-situ cell; x-ray; XAS; XAFS; FEM; Finita element metoden; röntgenspektroskopi;

    Abstract : This project analyzes how an in-situ cell can be developed to withstand high amounts of pressure and temperature of at least 100 bar and 500 °C. A theoretical prototype will be created as a product for Malmö University and other researchers to use or improve. READ MORE

  4. 3. Generation of Model NiMo Hydrotreating Nano-catalyst via the Spark Discharge Technique

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Hatoon Makhool; [2020]
    Keywords : Model catalyst systems; hydrotreating catalysts; NiMo catalysts; Spark discharge technique; nanoparticles; chemical engineering; kemiteknik; Technology and Engineering;

    Abstract : Establishing a technically practical method to generate representative model catalysts for the use in characterizations and testing prior to catalyst implementation in chemical process units would allow for a more sophisticated understanding of the underlying catalytic mechanisms. As a step towards establishing such a method, generating non-agglomerated, spherical NiMo nanoparticles, with diameters below 25 nm and atomic composition of maximum 30 at% Ni with Mo (maximum 3:7 Ni:Mo atomic ratio), for application as model hydrotreating catalysts, was addressed. READ MORE

  5. 4. Synthesis and Structural Characterization of Metal-Doped Titanate Nanotubes Using TEM, XRD and XAS

    University essay from Lunds universitet/Fysiska institutionen

    Author : Muhammad Yasir; [2011]
    Keywords : Physics and Astronomy;

    Abstract : This work presents the synthesis and structural characterization of titanate nanoproducts, focusing on the effect induced by the presence of silver ion in different concentrations. The synthesis and chemical analysis using TEM, XRD and EDX were performed at the University of Szeged in Hungary. READ MORE