Essays about: "laser"

Showing result 1 - 5 of 945 essays containing the word laser.

  1. 1. Geological characterization of rock samples by LIBS and ME-XRT analytical techniques

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Nsioh Elvis Nkioh; [2022]
    Keywords : geological characterization; analytical techniques; LIBS; ME-XRT; SEM; element maps; SEM-EDS; secondary electrons; rock samples; automated ore microscopy; SEM-Zeiss Merlin; element weight percentages; element oxide percentages; scanning techniques; analytical methods; laser induced breakdown spectrometry; multi energy x-ray transmission; scanning electron microscope; carbon coating; mineralogical classification; element composition; rock chemistry; rock chemical composition;

    Abstract :      One of the major challenges in earth sciences and mineral exploration has been to determine with high accuracy and at a fast rate the elemental composition as well as the general chemistry of a rock sample. Many analytical techniques e.g. READ MORE

  2. 2. The Development of a Model for Determining the Spatial Resolution of Pulsed-Neutron Sources

    University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Michael Byrnes; [2022]
    Keywords : Physics and Astronomy;

    Abstract : This project entails the development of a model for determining the spatial resolution in scanning applications of pulsed-neutron sources, such as at the European Spallation Source (ESS). The development of this model involves the simplification of the problem of representing a pulse neutron scanning across a sample by approximating the pulsed neutron beam as a continuous laser beam scanning across a one dimensional object of known dimensions. READ MORE

  3. 3. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Lassi Linnala; [2022]
    Keywords : femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

    Abstract : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. READ MORE

  4. 4. Validering av marklavskartering som underlag för renskötseln : en jämförelseanalys av fältbedömd marklavsförekomst med modellbaserad lavkarta

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Karin Nutti Pilflykt; [2022]
    Keywords : marklavskartering; rennäring; skogsbruk; Cladonia;

    Abstract : Since the 1950s, clear-cutting has been the dominant way of managing the Swedish forest. This has resulted in even aged forests and denser stands that have a negative impact on the distribution of terrestrial lichens. READ MORE

  5. 5. Quantum statistics of a three-level maser

    University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Author : Andreas Evensen; [2022]
    Keywords : Maser; Laser; SSD-maser; Euler s method; Runge-Kutta method; Louvillian; Dissipator; Lindblad s master equation; Entropy; Thermodynamics; Coherent-state; Glauber-state; Python; Rabi-Oscillations; Occupation number of the photon mode; Density operator; Physics and Astronomy;

    Abstract : Lasers and masers have numerous uses in today’s society. Improving our understanding of the underlying physics and its application is thus of great importance. READ MORE