Sökning: "beam emission spectroscopy"

Visar resultat 11 - 15 av 40 avhandlingar innehållade orden beam emission spectroscopy.

  1. 11. Resonant Laser Techniques for Combustion and Flow Diagnostics

    Författare :Rolf Fritzon; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; species; laser diagnostic techniques; temperature imaging; polarization spectroscopy; stimulated emission; DFWM; Fysik; Physics; turbulent mixing; LIF; Fysicumarkivet A:1998:Fritzon;

    Sammanfattning : This thesis presents results from two areas of research. Firstly, the resonant coherent laser techniques polarization spectroscopy (PS), degenerate four-wave mixing (DFWM) and stimulated emission (SE) have been developed in the general field of combustion diagnostics. LÄS MER

  3. 12. Plasmonic Nanostructures for Molecular Spectroscopy

    Författare :Björn Brian; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SEF; DNA; EBL; Nanoparticles; rhodamine 6G; biosensors; SERS; fluorescence;

    Sammanfattning : This thesis focuses on the fabrication, characterization and utilization of nanostructures for chemical sensing and optical enhancement processes.Noble metal nanostructures can support localized surface plasmon resonances (LSPRs), which amplify the strength of the electromagnetic field close to the structures. LÄS MER

  4. 13. Studies of ionised atoms with collision-based spectroscopy and laser spectroscopy

    Författare :Mingqi Wang; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : Atomic structure and collision properties of ionised atoms have been studied usingcollision-based spectroscopy and fast ion beam-laser spectroscopy.Collision induced photon emission spectra of Xe VI, Xe VII and Xe VIII andthe potassium like metal ions Mn VII, Fe VIII and Co IX have been recorded with a beam of multiply charged ions from an ECR (electron cyclotron resonance) ion source passing through an atomic target. LÄS MER

  5. 14. 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

  7. 15. Raman and Fluorescence Spectroscopy of Single Molecules and Metal Particles

    Författare :Jerk Bjerneld; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; laser-induced; single-molecule spectroscopy; surface-enhanced Raman scattering; nanoparticles;

    Sammanfattning : Technological and conceptual advances have led to the realization of single-molecule spectroscopy. This permit detailed investigations of heterogeneous systems in fields ranging from condensed matter physics to biochemistry. It was recently discovered that surface-enhanced Raman scattering (SERS) can be used to study single molecules. LÄS MER