Sökning: "Metal detector"

Visar resultat 1 - 5 av 21 uppsatser innehållade orden Metal detector.

  1. 1. Determination of the source strength of an AmBe neutron source and design of flexible holder system for accurate measurements of ionising radiation

    L2-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :Mathilde Ragot; [2022]
    Nyckelord :neutron source nuclear physics;

    Sammanfattning : The goal of this project was to determine the source strength of an Americium-Beryllium neutron source by irradiating metal foils of different elements. The irradiated foils were then placed on a High Purity Germanium detector and γ-decay from the decay of the neutron induced reaction products was observed and used to deduce the neutron flux. LÄS MER

  3. 2. Aurora detector : Affordable device for detection of optical aurora

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Författare :hans Alin; [2022]
    Nyckelord :Aurora; Detection;

    Sammanfattning : Aurora is a light phenomenon in the night sky that fascinates many people. This project has aimed to develop a detector that can send alerts to users and tell whether or not there is an aurora event. Many want to see the aurora, but not as many want to stay up all night to have the chance to see them. LÄS MER

  4. 3. Single Photon LSCM in the NIR Range

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Klara Wallenbro; [2022]
    Nyckelord :LSCM; NIR; SNSPD; LSCM; NIR; SNSPD;

    Sammanfattning : In this thesis a near-infrared laser scanning confocal microscope (NIR-LSCM) is built to operate with optimal performance at 1550nm in combination with simultaneous LED light imaging at 970nm. For detection, a camera equipped with a complementary metal oxide semiconductor (CMOS) sensor and a superconducting nanowire single photon detector (SNSPD) are used for the LED part and the LSCM part, respectively. LÄS MER

  5. 4. Graffiti Detection using a variable temperature MOx sensor and Machine Learning

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Mikael Kristensson; Christian Clemedtson; [2021]
    Nyckelord :MOX sensor; variable temperature; machine learning; graffiti; spray paint; Support Vector Machine; k-Nearest Neighbour; neural network; Mathematics and Statistics;

    Sammanfattning : MOx sensors are widely used for sensing gases. In this thesis a variable temperature MOx sensor was used to detect graffiti spray paint and differentiate it from other substances using the sensors sensitivity to different gases at different temperatures using machine learning. LÄS MER

  7. 5. Optical characterisation of AAO/CsPbBr3 perovskite nanocomposites

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

    Författare :Klára Nováková; [2021]
    Nyckelord :perovskite; scintillator; optoelectronics; semiconductor; X-ray detection; Physics and Astronomy;

    Sammanfattning : Direct bandgap metal lead halide perovskites offer promising optoelectronic properties desirable in a wide range of applications including photodetection. However, the incomplete and poor understanding of the photophysical processes taking place in these materials, along with their poor stability, is the bottleneck for optimisation and further development of metal halide perovskite devices. LÄS MER