Search for dissertations about: "Zone plates"

Showing result 1 - 5 of 30 swedish dissertations containing the words Zone plates.

  1. 1. Zone Plates for Hard X-Ray Free-Electron Lasers

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Daniel Nilsson; KTH.; [2013]
    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

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

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Fredrik Uhlén; KTH.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray optics; Zone plates; Nanofabrication; X-ray free-electron lasers; Physics; Fysik;

    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

  3. 3. Separation of Proteins with Capillary Electrophoresis in Coated Capillaries with and without Electroosmosis Studies on Zone Broadening and Analytical Performances

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Sheila Mohabbati; Uppsala universitet.; [2006]
    Keywords : Pharmaceutical chemistry; Capillary electrophoresis; capillary coatings; proteins; zone broadening; zone sharpening; efficiency; resolution; protein-surface adsorption; protein-buffer interaction; analytical performance; Farmaceutisk kemi;

    Abstract : Proteins have such structural features that they may interact with different types of surfaces by all possible forces, i.e., electrostatic, hydrogen bonding, hydrophobic. In this thesis two different types of coatings for fused silica capillaries aimed to eliminate such interactions have been studied. READ MORE

  4. 4. High-Aspect Ratio Nanofabrication for Hard X-Ray Zone Plates

    University dissertation from Stockholm, Sweden : KTH Royal Institute of Technology

    Author : Karolis Parfeniukas; KTH.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nanofabrication; x-ray optics; zone plate; tungsten; silicon; reactive ion etching; metal-assisted chemical etching; Ronchi test; Physics; Fysik;

    Abstract : Hard x-ray nanoimaging enables structural investigations of new materials for many applications. For high-resolution experiments, zone plate x-ray optics are commonly chosen.Two methods of zone plate nanofabrication are presented in this thesis.Zone plates are circular diffraction gratings with radially decreasing grating period. READ MORE

  5. 5. Laboratory soft x-ray microscopy and tomography

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Michael Bertilson; KTH.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Microscopy; X-ray optics; Diffractive optics; Zone plates; X-ray microscopy; Soft X-ray physics; Tomography; NATURAL SCIENCES Physics Other physics Optics; NATURVETENSKAP Fysik Övrig fysik Optik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : Soft x-ray microscopy in the water-window (λ = 2.28 nm – 4.36 nm) is based on zone-plate optics and allows high-resolution imaging of, e.g. READ MORE