Sökning: "vacuum breakdown"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden vacuum breakdown.

  1. 1. Fabrication of sub-10 nm solid-state nanopores by electrical breakdown

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

    Författare :Kasumi Tsutsumi; [2023]
    Nyckelord :Nanopore fabrication; Solid-state material; Silicon nitride; Graphene; DNA translocation; Nanopor-avkänning; fast tillståndsmaterial; kiselnitrid; grafen; DNA-translokation;

    Sammanfattning : Nanopore sensing is a versatile technique that employs very small openings, known as nanopores, to study biomolecules. The use of nanopores on solid-state membranes has gained attention due to its potential for low-cost and high-throughput sensing of single molecules in liquids. LÄS MER

  3. 2. Geological characterization of rock samples by LIBS and ME-XRT analytical techniques

    Master-uppsats, Luleå tekniska universitet/Geovetenskap och miljöteknik

    Författare :Nsioh Elvis Nkioh; [2022]
    Nyckelord :geological characterization; analytical techniques; LIBS; ME-XRT; SEM; element maps; SEM-EDS; secondary electrons; rock samples; automated ore microscopy; SEM-Zeiss Merlin; element weight percentages; element oxide percentages; scanning techniques; analytical methods; laser induced breakdown spectrometry; multi energy x-ray transmission; scanning electron microscope; carbon coating; mineralogical classification; element composition; rock chemistry; rock chemical composition;

    Sammanfattning : One of the major challenges in earth sciences and mineral exploration has been to determine with high accuracy and at a fast rate the elemental composition as well as the general chemistry of a rock sample. Many analytical techniques e.g. LÄS MER

  4. 3. Haveri och åtgärdsanalys av MC-pump : Haverianalys av ett återkommande problem för en medium-consistency-pump samt åtgärdsanalys för att upphöra problematiken.

    M1-uppsats, Karlstads universitet

    Författare :Fabian Padilla Prado; [2021]
    Nyckelord :Maskinteknik; Haverianalys; Åtgärdsanalys; Pump; Pumpteknik; Återbetalningskalkyl;

    Sammanfattning : This report investigates a recurring problem on a Kamyr MCP 25-15, which is located in the bleaching plant in a paper mill in Värmland. The MC-Pump Kamyr 25-15 has in the last two years crashed and caused downtime in pulp production. Causing large costs in repairs, personnel and in lost pulp production. LÄS MER

  5. 4. Application of GEANT4 toolkit for simulations of high gradient phenomena

    Kandidat-uppsats, Uppsala universitet/FREIA; Uppsala universitet/Institutionen för teknikvetenskaper

    Författare :Daniel Persson; [2018]
    Nyckelord :GEANT4; XBox 2; XBox; CERN; CLIC; field emission; vacuum breakdown; dark current; breakdown current; spectrometer; FREIA; accelerator; cavity;

    Sammanfattning : To study electron emissions and dark currents in the accelerating structures in particle colliders, a test facility with a spectrometer has been constructed at CERN. This spectrometer has been simulated in the C++ toolkit GEANT4 and in this project the simulation has been improved to handle new realistic input data of the emitted electrons. LÄS MER

  7. 5. Studies of vacuum discharges in the CLIC accelerating structure

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Anton Tropp; [2016]
    Nyckelord :Breakdowns; CLIC; Discharges; UCXS; RF-structures; Accelerator.; Technology and Engineering;

    Sammanfattning : The Compact Linear Collider (CLIC), is one of the proposed successors to the Large Hadron Collider (LHC) accelerator at the European Organization for Nuclear Research. (CERN). In CLIC, particles are accelerated by very strong electric fields. LÄS MER