Master Thesis

PUBDB-2022-01062

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation of Stimulated Elastic Emission Using Soft X-Rays

Diaman, D. (Corresponding author)XFEL.EU*DESY* ; Gruebel, G. (Thesis advisor)XFEL.EU*DESY* ; Roehlsberger, R. (Thesis advisor)Extern*XFEL.EU*DESY*

2020

Abstract: Extremely bright, coherent and ultra-short pulses have become recently available thanks to theavailability of X-ray Free-Electron Laser sources. Such superior beam properties allow for thefirst time to investigate non-linear phenomena in the X-ray range. In particular the famousBeer-Lambert law was put in question at extremely high X-ray fluences. This work presentsa fluence dependence study of scattering from a magnetic multilayer system carried out at the SCS instrument of European XFEL facility. The magnetic scattering from a CoPt multilayer was collected by a fastCCD detector. A novel method was applied to normalize the scattered intensity from the sample with the help of a specially designed grating structure. The scattered intensity from the sample was investigated under low fluence and high fluence conditions. The scattered intensity normalized to the grating intensity decreases as a function of increasing fluence. This results might indicate existence of stimulated elastic scattering.

Note: Masterarbeit, University of Hamburg, 2020

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Contributing Institute(s):

1. Coherent X-ray Scattering (FS-CXS)
2. The European XFEL Users (XFEL-User)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. SCS: Spectroscopy & Coherent Scattering (SASE3)

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