Sökning: "High brightness electron beam"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden High brightness electron beam.

  1. 1. Studies on high brightness electron beams for short pulses and free electron laser

    Författare :Sara Thorin; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bunch compression; sub-ps pulses; X-rays; High brightness electron beam; free electron laser; electron accelerator; collective effects.;

    Sammanfattning : Accelerator based lightsources are one of the most powerful tools today for producing high intensity radiation at very short wavelengths. While synchrotron storage rings provide a high average brilliance in a wide wavelength range, the next generation of lightsources aim towards producing ultra-short pulses in the X-ray regime. LÄS MER

  3. 2. Liquid-Jet-Target Microfocus X-Ray Sources : Electron Guns, Optics and Phase-Contrast Imaging

    Författare :Tomi Tuohimaa; Hans M. Hertz; Stephen Wilkins; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electron-impact; x-ray; brightness; liquid-jet-target; phase-contrast imaging; Engineering physics; Teknisk fysik;

    Sammanfattning : This Thesis describes the development of an electron-impact microfocus x-ray source and its application for phase-contrast imaging. The source is based on a novel, liquid-jet target concept. Stable and continuous operation can be achieved at substantially higher electron-beam power densities than conventional solid target based systems. LÄS MER

  4. 3. 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. 4. Zone Plates for Hard X-Ray Free-Electron Lasers

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

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER