Sökning: "Röntgenkälla"

Hittade 5 uppsatser innehållade ordet Röntgenkälla.

  1. 1. Development and understanding of a model V2O5/anatase TiO2(101) SCR catalyst

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

    Författare :Johanna Paulsson; [2023]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : A model V2O5/ anatase TiO2(101) SCR catalyst is studied with the purpose of developing and understanding the reaction mechanism through which this catalyst reduces NOx. Several reaction mechanisms have been proposed for this catalyst in the past, but there is still no agreement on which of these describe the reaction the best, if any. LÄS MER

  3. 2. Karatärisering av XRF-mätning med 120kV röntgenrör

    Kandidat-uppsats, Mittuniversitetet/Institutionen för elektronikkonstruktion

    Författare :Rahimi Mahmood; [2021]
    Nyckelord :XRF; X-ray source; 123CdTe detector; spectrometer; heavy metals; intensity; K-lines; L-lines; and limit of detection LOD .; XRF; Röntgenkälla; 123CdTe-detektor; spektrometer; tungmetaller; intensitet; K-linjerna; L-linjerna och limit of detection LOD .;

    Sammanfattning : Syftet med denna undersökning är att utvärdera en XRFmätuppställning som använder högre spänning påröntgenröret än konventionella XRF-instrument. Iutvärderingen uppskattas Limit Of Detection (LOD) påtungmetaller genom att använda XRF-metoden, där dettestades olika filter, vinklar och rörspänning och derasinverkan på provet. LÄS MER

  4. 3. Investigation and Evaluation of Pump Types for a Liquid Metal Jet X-Ray Source

    Master-uppsats, KTH/Maskinkonstruktion (Avd.)

    Författare :Matilda Svensson; [2020]
    Nyckelord :pumps; pump types; liquid galinstan; metal jet; x-ray source; pumpar; pumptyper; flytande galinstan; metaljetstråle; röntgenkälla;

    Sammanfattning : Since Wilhelm C. Röntgen discovered the x-rays in 1895 little has been done to improve the x-ray technology. In 2003 a group of scientists at KTH Royal Institute of Technology suggested a new type of x-ray source, namely a liquid metal jet x-ray source. The solid anode in the original source was changed to a liquid metal jet anode. LÄS MER

  5. 4. Investigating the stability of a laser-based plasma x-ray source

    Kandidat-uppsats, Lunds universitet/Kemisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Fredrik Parnefjord Gustafsson; Jens Uhlig; Wilfred Fullagar; Amal El Nahhas; [2016]
    Nyckelord :pulse energy; pointing; TES; transmission-edge-sensor; EXAFS; spectrum; spectroscopy; absorption; emission; time-resolved; Brunel mechanism; vacuum heating; water-jet; CCD; andor; LPXS; x-ray; plasma; laser; fluctuations; stability; pixel detector; beam profile sensor; resonant absorption; beam position; Physics and Astronomy;

    Sammanfattning : The use of laser based plasma x-ray sources (LPXS) has quickly expanded during the past decades due to rapid development of ultrafast laser systems. These sources are used in many research applications such as emission, absorption and particularly time-resolved spectroscopy. LÄS MER

  7. 5. Performance of a Micro-CT System : Characterisation of Hamamatsu X-ray source L10951-04 and flat panel C7942CA-22

    Master-uppsats, KTH/Skolan för teknik och hälsa (STH)

    Författare :Michael Baumann; [2014]
    Nyckelord :micro-CT; computed tomography; flat panel; characterisation; performance evaluation; Hamamatsu; image correction;

    Sammanfattning : This master thesis evaluated the performance of a micro-CT system consisting of Hamamatsu microfocus X-ray source L10951-04 and CMOS flat panel C7942CA-22. The X-ray source and flat panel have been characterised in terms of dark current, image noise and beam profile. LÄS MER