Search for dissertations about: "Breakdown"

Showing result 1 - 5 of 339 swedish dissertations containing the word Breakdown.

  2. 1. Microwave Breakdown: Physics and Applications

    Author : Ulf Jordan; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; resonators; breakdown plasma; waveguides; microwave breakdown; metal wedges; HPM protection;

    Abstract : Theories for microwave breakdown in gases, with emphasis on Air, are presented in this thesis. Underlying physical processes are described together with models suitable for scientific research and technical development. READ MORE

  4. 2. Microwave Breakdown in Inhomogeneous Fields

    Author : Joel Rasch; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; corona; inhomogeneous fields; Microwave breakdown; multipactor;

    Abstract : Microwave breakdown continues to be a risk in many applications involving the transmission and reception of microwave frequency signals. Satellite communication is especially interesting from the research point of view because of the extreme costs, and limited testing possibilities. READ MORE

  5. 3. On vortex breakdown in swirling annular jets

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Carl Fredrik Stein; Göteborgs universitet.; Gothenburg University.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; swirling jets; vortex breakdown; conical self-similarity; swirl numbers; CFD;

    Abstract : .... READ MORE

  6. 4. Microwave Gas and Multipactor Breakdown in Inhomogeneous Fields

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Joel Rasch; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; corona; inhomogeneous fields; multipactor; Microwave breakdown;

    Abstract : Microwave gas and multipactor breakdown remains to be one of the limiting factors for the maximum power in microwave devices. Above a certain electric field strength, the so-called breakdown threshold, free electrons can multiply by making ionizing impacts with neutral gas molecules, or causing secondary emission upon impact with system surfaces. READ MORE

  7. 5. Mechanisms of Electrical Ageing of Oilimpregnated Paper due to Partial Discharges

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Mohamad Ghaffarian Niasar; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; partial discharges; oil-impregnated paper; oil; transformer insulation; dielectric frequency response; breakdown strength; ion mobility; thermal ageing; electrical ageing; moisture in paper; life time; thermal breakdown.; Electrical Engineering; Elektro- och systemteknik;

    Abstract : In this thesis, partial discharge (PD) phenomenon in oil-impregnated paper (OIP) is investigated under accelerated electrical stress. The thesis is mainly focused on the characteristic of PD activity and the influence it has on the insulation properties of OIP. READ MORE