Sökning: "Magnetfält"

Visar resultat 21 - 25 av 115 uppsatser innehållade ordet Magnetfält.

  1. 21. PCBA verification and fault detection using a low-frequency GMR-based near-field probe with magnetic closed-loop feedback compensation : A non-contact alternative to physical probing

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

    Författare :Joacim Sundh; [2022]
    Nyckelord :GMR; sensor; magnetic field; near-field; probe; linearity; PCB; coil; PCBA; analogue integrated circuits; analog; operational amplifiers; electrical fault detection; feedback circuits; in-circuit tests; GMR; sensor; magnetfält; närfält; sond; linjäritet; mönsterkort; spole; kretskort; analoga integrerade kretsar; operationsförstärkare; elektrisk feldetektering; återkopplingskretsar; kretskortstest;

    Sammanfattning : As electronics are getting both smaller and more advanced, the need to verify and validate remains and the means are getting more complex the more functions and components are added. Traditionally, in-circuit tests (ICTs) are performed by probing dedicated test points on the Printed Circuit Board Assembly (PCBA) in a test sequence that is unique to each product. LÄS MER

  3. 22. Using satellite data to calculate entropy of electrons at collisionless shocks

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

    Författare :Sofie Berglund; Alice Wallner; [2022]
    Nyckelord :entropy; electrons; plasma; Earth’s bow shock; magnetic field; collisionless shock; plasma beta; Alfv´en Mach number; MMS; NASA; satellite; IRF;

    Sammanfattning : The solar wind is a supersonic flow of protons and electrons emitted in all directions from the sun. As the supersonic solar wind encounters Earth’s magnetic field, it creates the Earth’s bow shock, which increases the kinetic entropy of electrons passing through it. LÄS MER

  4. 23. Magnetic Ionic Liquids in Solutions and Emulsions

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Simon Bruno; [2022]
    Nyckelord :ionic liquids; microemulsion; magnetic response; surfactant; co-surfactant; imidazolium cation; polarity; chain length effect; joniska vätskor; mikroemulsion; magnetisk respons; surfaktant; co-surfaktant; imidazoliumkatjon; polaritet; kedjelängdseffekt;

    Sammanfattning : This research thesis reports experimental work done to design a stable magneticmicroemulsion of ionic liquid in 2-ethylhexyl laurate with the help of an ionic surfactant andan alcohol co-surfactant. The ionic liquids tested were based on a 1,3-dialkylimidazoliumcation with different alkyl chain lengths and a tetrachloroferrate anion ([FeCl4]+) to ensure theemulsion is sensitive to applied magnetic fields. LÄS MER

  5. 24. Modelling of the Bow Shock and Magnetopause of Jupiter Using In-situ Juno Data

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

    Författare :Emanuel Reuithe Löfgren; Lukas Grigelionis; [2022]
    Nyckelord :Space; Jupiter; Bow Shock; Magnetopause; Juno; Plasma; Modelling;

    Sammanfattning : When the solar wind encounters a planet’s magnetic field, they interact and the different plasma and magnetic field behaviours divides the magnetosphere into different regions. Two important region boundaries to the outer magnetosphere, called the magnetosheath, are the bow shock and magnetopause. LÄS MER

  7. 25. Improving the safe mode robustness of an Earth observation satellite

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Guillaume Trimoreau; [2022]
    Nyckelord :avoidance; dazzling; magnetic control; Monte Carlo; safe mode; simulation; tuning; solundvikelsemanöver; solbländning; magnetisk kontroll; Monte Carlo-metoden; säkra läget; simulation; inställning;

    Sammanfattning : Airbus Defence and Space is developing an Earth observation platform. The payload of that platform is an optical instrument, which has to be protected from Sun dazzling in order to preserve its integrity. LÄS MER