Sökning: "x-ray flux"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden x-ray flux.

  1. 1. Biological Laboratory X-Ray Microscopy

    Författare :Mikael Kördel; Hans Hertz; Ulrich Vogt; Jonas A. Sellberg; Rajmund Mokso; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; x-ray microscopy; laboratory x-ray microscopy; water window; biological; cell imaging; virus; Biological and Biomedical Physics; Biologisk och biomedicinsk fysik; Optics and Photonics; Optik och fotonik;

    Sammanfattning : Soft x-ray microscopy in the water window (? ≈ 2.3 − 4.3 nm) is a powerful technique for high-resolution biological imaging. The strong natural contrast between carbon-based structures and water allows visualization of hydrated and unstained samples, while providing enough transmission through up to ∼ 10 μm of organic matter. LÄS MER

  2. 2. Nanowire devices for X-ray detection

    Författare :Lert Chayanun; NanoLund; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Nanowires; Nanowire solar cells; X-ray detectors; X-ray beam induced current;

    Sammanfattning : High spatial resolution X-ray microscopy has become a dedicated tool to study nanocrystals and nanostructure devices in recent years. In general, the spatial resolution of X-ray microscopy depends on the spot size of the X-ray beam and the pixel size of X-ray detectors. LÄS MER

  3. 3. Small-Animal Imaging with Liquid-Metal-Jet X-Ray Sources

    Författare :Daniel Larsson; Hans Hertz; Anna Burvall; David Paterson; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; X-ray; x-ray imaging; small animal; phase contrast; tomography; Physics; Fysik;

    Sammanfattning : Small-animal x-ray imaging is an important tool for medical research. The penetration power of x-rays makes it possible to investigate the 3D structure of small animals and other thick biological samples by computed tomography (CT). LÄS MER

  4. 4. Compact Liquid-Jet X-Ray Sources

    Författare :Oscar Hemberg; KTH; []
    Nyckelord :liquid-jet; x-ray; EUV; plasma; electron beam; source;

    Sammanfattning : This thesis describes the development, characterization andoptimization of compact, high-brightness, liquid-jet-targetx-ray sources. Two different source types have been developedfor different wavelength regions and applications. LÄS MER

  5. 5. Compact Soft X-Ray Microscopy : Sources, Optics and Instrumentation

    Författare :Per Takman; Hans Hertz; Janos Kirz; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; soft x-ray microscopy; water window; compact; laser plasma; liquid jet; zone plate optics; Physics; Fysik;

    Sammanfattning : This thesis describes the development of a sub-60-nm full-period resolution compact soft x-ray microscope operating in the water-window region (2.3-4.4 nm). Soft x-ray water-window microscopy is a powerful technique for high-resolution imaging of organic materials exploiting the natural contrast mechanism between carbon and oxygen, cf. LÄS MER