Search for dissertations about: "Focusing of X-ray radiation"

Showing result 1 - 5 of 15 swedish dissertations containing the words Focusing of X-ray radiation.

2. 1. Laboratory x-ray fluorescence tomography

   Author : Jakob C. Larsson; Hans Hertz; Anna Burvall; Ulrich Vogt; Norbert Pelc; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; x-ray; fluorescence; x-ray fluorescence; nanoparticle; xrf; xfct; tomography; Fysik; Physics;

   Abstract : X-ray fluorescence (XRF) tomography is an emerging bio-imaging modality with potential for high-resolution molecular imaging in 3D. In this technique the fluorescence signal from targeted nanoparticles (NPs) is measured, providing information about the spatial distribution and concentration of the NPs inside the object. READ MORE

4. 2. Ultrafast spin dynamics at the nanoscale : using coherent X-ray and terahertz radiation

   Author : Nanna Zhou Hagström; Stefano Bonetti; Stefan Eisebitt; Ferran Macià Bros; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; XFEL; small-angle X-ray scattering; X-ray holography; ultrafast magnetism; symmetry-breaking; magnetic domains; terahertz; magnetic field enhancement; metamaterial; time-resolved magneto-optical microscope; Physics; fysik;

   Abstract : The field of ultrafast magnetism is driven by the growing need for faster and more efficient magnetic data storage, which comprises the vast majority of the digital information worldwide. However, after more than two decades of intense research, the understanding of the fundamental physical processes governing the transfer of angular momentum necessary for magnetic switching, is still lacking, partially hampered by the appropriate experimental tools. READ MORE

5. 3. Characterisation and application of a laser-based hard x-ray source

   Author : Matthias Grätz; Atomfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray spectroscopy; radiography; medical imaging; differential imaging; time-gated imaging; scatter reduction; Monte Carlo simulation; Atomic and molecular physics; computed tomography; Fysicumarkivet A:1998:Grätz; laser-produced plasma; Atom- och molekylärfysik; X-ray sources;

   Abstract : Hard X-rays are generated by focusing 110 fs laser pulses with intensities of about 1017 W·cm-2 onto solid metal targets. Characteristic properties of this X-ray source are the small source size, the short pulse duration and the high peak flux. READ MORE

6. 4. Nanofabrication of Zone Plates for Hard X-Ray Free-Electron Lasers

   Author : Fredrik Uhlén; Ulrich Vogt; Thomas Wilhein; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray optics; Zone plates; Nanofabrication; X-ray free-electron lasers; Fysik; Physics;

   Abstract : This Thesis describes the development of hard X-ray zone plates intended for focusing radiation at X-ray free-electron lasers (XFELs). XFELs provide unprecedented brightness and zone plates which are put in the intense X-ray beam are at risk of being damaged. READ MORE

7. 5. Zone Plates for Hard X-Ray Free-Electron Lasers

   Author : Daniel Nilsson; Ulrich Vogt; Thomas Tschentscher; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray optics; Zone plates; XFEL; x-rays; free-electron laser; heat transfer;

   Abstract : Hard x-ray free-electron lasers are novel sources of coherent x-rays with unprecedented brightness and very short pulses. The radiation from these sources enables a wide range of new experiments that were not possible with previous x-ray sources. Many of these experiments require the possibility to focus the intense x-ray beam onto small samples. READ MORE