Sökning: "laserstråle"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet laserstråle.

  1. 1. Towards multi-sensor monitoringand control of Directed Energy Deposition using a Laser Beam

    Författare :Agnieszka Kisielewicz; Fredrik Sikström; Barbara Previtali; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Directed Energy Deposition; Laser Beam; in-situ monitoring; multisensor; resistive pre-heating; Directed Energy Deposition; laserstråle; in-situ övervakning; multisensor; resistiv förvärmning; Production Technology; Produktionsteknik;

    Sammanfattning : Under senare år har omfattande insatser gjorts för att främja mer hållbara flygtransporter i Europa. De konventionella tillverkningsmetoderna som används inom flyg- och rymdindustrin kräver betydande mängder råmaterial, vars utvinning, bearbetning och användning har negativa miljöeffekter. LÄS MER

  3. 2. Electron beam melting: Impact of part surface properties on metal fatigue and bone ingrowth

    Författare :Rebecca Klingvall Ek; Lars-Erik Rännar; Mikael Bäckström; Jaan Hong; Ola Harrysson; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing AM ; Electron Beam Melting EBM ; As-built surfaces; Bone Ingrowth; Metall Fatigue; Machined Surfaces; Hirtisation; Hot Isostatic Pressing HIP ;

    Sammanfattning : AbstractThe aim of this thesis is to investigate aspects on how additive manufacturing (AM) contributes to functional bone implants with the use of the electron beam melting (EBM) technology. AM manufactures parts according to computer-aided design, and the EBM technology melts powder using an electron beam, which acts similar to a laser beam. LÄS MER

  4. 3. Infrared Laser-Induced Grating Techniques for Diagnostics in Reactive Flows

    Författare :Dina Hot; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser diagnostics; infrared; laser-induced grating spectroscopy; degenerate four-wave mixing; flames; temperature; concentration; Fysicumarkivet A:2020:Hot;

    Sammanfattning : AbstractThe work presented in this thesis is mainly focused on the development andapplication of infrared laser-induced grating techniques in order to measure the gasphase temperature and species concentrations in reactive flows. The two techniquesused for this purpose are laser-induced grating spectroscopy (LIGS) and degeneratefour-wave mixing (DFWM). LÄS MER

  5. 4. Light-Matter Interaction on the Attosecond Timescale

    Författare :Marcus Dahlström; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2011:Dahlström; Temporal characterization; Two-color harmonic generation; High-order harmonic generation; Attosecond pulse trains; Electron wave packets; Two-photon ionization; Coherent control;

    Sammanfattning : Attosecond science refers to physical processes that occur on the natural timescale of electron motion in atomic and molecular systems. Attosecond time resolution can be obtained experimentally through a process called high-order harmonic generation where sharp attosecond pulses are formed in the time domain. LÄS MER

  7. 5. Development of Multi-Dimensional Laser Techniques for In-situ Combustion Diagnostics

    Författare :Jenny Nygren; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser Diagnsotics; Visualisation; Laser technology; Laserteknik; Motors and propulsion systems; Motorer; framdrivningssystem; Combustion; Temperature; Fysicumarkivet A:2003:Nygren;

    Sammanfattning : Multi-dimensional, laser-based measurements of quantities important for obtaining a better understanding of combustion processes, particularly of temperature and of species distributions, were performed using laser-induced fluorescence (LIF). The main purpose of the temperature experiments was to investigate the potential of employing a two-line atomic fluorescence technique (TLAF), using indium as the tracer species, in sooting environments such as in diesel engines. LÄS MER