Sökning: "Rayleigh scattering"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Rayleigh scattering.

  1. 1. Ly-α Dayglow on Uranus : Radiative Transfer Modelling

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jahangir Jazayeri; [2021]
    Nyckelord :Uranus; Lyman-alpha; Ly-α; resonant scattering; Rayleigh scattering; interplanetary medium; ultraviolet; hydrogen; methane; parameter study; limb brightening; Voyager 2; Ultraviolet Spectrometer;

    Sammanfattning : Uranus is one of the least explored planets in our solar system. Event though the Uranian Ly-α emission has been a subject of study for decades, there is not a consensus on the sources contribution to the total signal. LÄS MER

  3. 2. Live 3D imaging quantum LiDAR

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Theodor Staffas; [2021]
    Nyckelord :lidar; otdr; snspd; lidar; otdr; snspd;

    Sammanfattning : In this thesis, I demonstrate a single­photon Light Detection And Ranging, (LiDAR)system operating at 1550 nm capable of reconstructing 3D environments live withmm resolution at a rate of 400 points per second using eye­safe laser pulses. Thesystem was built using off­-the-­shelf optical components and analysis was performedusing open-­source software. LÄS MER

  4. 3. Distributed Temperature Sensing Using Phase-Sensitive Optical Time Domain Reflectometry

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Simon Ek; [2020]
    Nyckelord :Applied physics; Distributed optical fiber sensing; Rayleigh scattering; OTDR; phase-OTDR; Temperature; Refractive index; Strain; Correlation; RISE; Single mode fiber; SMF; Tillämpad fysik; Distribuerad optisk fibermätning; Rayleigh-spridning; OTDR; phase-OTDR; Temperatur; Brytningsindex; Töjning; RISE; Korrelation; Singelmodfiber; SMF;

    Sammanfattning : This thesis explores and evaluates the temperature measuring capabilities of a phase-sensitive optical time-domain reflectometer (φ-OTDR), which exploits Rayleigh backscattering in normal single mode optical fibers. The device is constructed and its setup explained, and a protocol for making temperature measurements with it is developed. LÄS MER

  5. 4. Development of Spectroscopic Measurements for Raman and Thomson Scattering Diagnostics ——Applications in Combustion and Plasma

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Författare :Miaoxin Gong; [2019]
    Nyckelord :Raman scattering; Raman spectroscopy; Thomson scattering; stray light suppression; periodic shadowing; high dynamic range imaging; digital micro-mirror device; DMD; laminar flames; combustion; gas discharge; plasma; laser diagnostics; spectrometer; improved spectroscopy; spectroscopy; Physics and Astronomy;

    Sammanfattning : This thesis work concerns methods for improved spectroscopy including stray-light suppression, dynamic range improvement and signal enhancement. These methods were applied in Raman and Thomson- scattering spectroscopy in combustion and plasma. LÄS MER

  7. 5. Inelastic LIDAR for Monitoring Aquatic Fauna

    Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Författare :Mikael Ljungholm; [2016]
    Nyckelord :LIDAR; Laser; hyperspectral; multispectral; inelastic; ecology; monitoring; plankton; aquatic; Scheimpflug; Technology and Engineering;

    Sammanfattning : This thesis is oriented around designing the world first inelastic hyperspectral LiDAR(Light Detection and Ranging) system for aquatic use. The system was designed around the task of monitoring zooplankton and environmental indicators in water. Scheimpflug lidar was previously developed for monitoring flying insects, aerosols and gases. LÄS MER