Sökning: "magnetisk fältstyrka"

Hittade 4 uppsatser innehållade orden magnetisk fältstyrka.

  1. 1. 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. 2. Characterizing magnetic susceptibility and remanent magnetization of magnetite and hematite rich drill-core samples at Blötberget

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Andreas Bjork; [2018]
    Nyckelord :Verwey; Morin; Curie; Néel; magnetite; hematite; alteration; iron-ore; quality control; kappabridge; hysteresis; susceptibility; anisotropy; Verwey; Morin; Curie; Néel; magnetit; hematit; oxidation; järnmalm; kvalitetskontroll; kappabridge; hysteresis; susceptibilitet; anisotropi;

    Sammanfattning : Laboratory magnetic measurements are used to develop a methodology to characterize the Kiruna-type Rare Earth Elements (REE) bearing apatite iron-oxide deposits at Blötberget in central Sweden. This high-grade ore deposit is known to have sharp boundaries between lens shaped main ore bodies of magnetite-rich ore, and a complex hematite-rich ore associated with pegmatites and skarn formation. LÄS MER

  4. 3. Isolated magnetic field structures in the Saturn magnetosphere

    Master-uppsats, KTH/Rymd- och plasmafysik

    Författare :Fredrik Stetler; [2017]
    Nyckelord :;

    Sammanfattning : This report’s primary focus is to use the data gathered by the Cassini satellite and analyzeits magnetic field data around Saturn. By looking for isolated changes in magneticfield values locations of potential plasmoids can be determined and examined. LÄS MER

  5. 4. Spatial variation of radio frequency magnetic field exposure from clinical pulse sequences in 1.5T MRI

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Andreas Forsberg; [2014]
    Nyckelord :magnetic resonance; exposure; rf; magnetic field strength; crawford cell; magnetisk resonanstomografi; exponering; rf; magnetisk fältstyrka; crawford cell;

    Sammanfattning : Cell biological exposure studies in magnetic resonance imaging (MRI) environment, where a complex mixture of strong magnetic fields are present, have attracted considerable interest in recent years. The outcome of such studies might depend strongly on the conditions, for example exposure parameters and spatial variations of exposure. LÄS MER