Sökning: "direct detectors"

Visar resultat 11 - 15 av 23 uppsatser innehållade orden direct detectors.

  1. 11. In-situ calibration device of firn properties for Askaryan neutrino detectors

    L2-uppsats, Uppsala universitet/Högenergifysik

    Författare :Jakob Beise; [2021]
    Nyckelord :Askaryan; UHE neutrinos; in-ice radio detection; in-situ detector calibration; deep learning; radio neutrino detector; ARIANNA;

    Sammanfattning : Simulations have demonstrated that high-energy neutrinos (E > 1017 eV) are detected cost-efficiently via the Askaryan effect in ice, where a particle cascade induced by the neutrino interaction produces coherent radio emission that can be picked up by antennas installed below the surface. A good knowledge of the near surface ice (aka firn) properties is required to reconstruct the neutrino properties. LÄS MER

  3. 12. Dark Matter – Direct Detection and Capture in the Sun

    Master-uppsats, KTH/Fysik

    Författare :Erika Lind; [2020]
    Nyckelord :Dark matter; direct detection; indirect detection; solar capture; inelastic dark matter; Mörk materia; direkt detektion; indirekt detektion; solinfångning; inelastisk mörk materia;

    Sammanfattning : Dark matter has been inferred from various observations such as in galaxy clusters, flat galactic rotation curves, gravitational lensing measurements and the cosmic microwave background. Despite overwhelming observational evidence and ongoing searches, a clear signal of dark matter has not yet been detected. LÄS MER

  4. 13. Quai-Passive 5.8 GHz Front-End Design and Implementation for Vital Signs Detection

    Master-uppsats, Linköpings universitet/Fysik och elektroteknik; Linköpings universitet/Tekniska högskolan

    Författare :Henrik Kalvér; [2018]
    Nyckelord :;

    Sammanfattning : This thesis investigates the possibility to measure vital signs, such as heartbeat and respiratory rate, by developing a RF-front end for wireless detection. The RF-front has been developed and manufactured as a continuous wave Doppler radar receiver, which utilizes quadrature demodulation by means of a multi-port correlator together with power detectors for down conversion. LÄS MER

  5. 14. Principles for Diverting and Merging Viscous Flows : Evaluation and Visualisation

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Mikrosystemteknik

    Författare :Åke Strese; [2017]
    Nyckelord :Flow splitter; chromatography; diversion; dispersion; laminar; fluid mechanics; MEMS; mock-up; design; delayloop; Mass rate attenuator MRA ; Flödessplitter; flödesdelning kromatografi; dispersion; laminära flöden; fluidmekanik; MEMS; mock-up; delayloop; kvarhållningssyste; mass rate attenuator MRA ;

    Sammanfattning : In the chemistry branch of science is often a chromatograph usedto separate and purify substances in a solution. In achromatograph, different detectors are used to analyse the samplesconstituents. Some detectors destroy the sample during analysis. LÄS MER

  7. 15. Simulation of Dark Matter Using micrOMEGAs

    Kandidat-uppsats, KTH/Teoretisk fysik

    Författare :Nikolaos Kalkitsas; Thom Jäderlund; [2015]
    Nyckelord :;

    Sammanfattning : Weakly interactive massive particles (WIMPs) are one of the most popular dark matter candidates and in our study we have decided on a WIMP based model due to its accurate predictions of the dark matter (DM) relic density. To determine a possible WIMP, we have used the minimal supersymmetric model (MSSM), an extension of superymmetry (SUSY). LÄS MER