Sökning: "johan ring"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden johan ring.

  1. 1. Prospects for a Free Electron Laser at the FemtoMAX Beamline

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

    Författare :Johan Holmberg; [2024]
    Nyckelord :Free Electron Lasers; FEL; synchrotron radiation; MAX IV; FemtoMAX; GENESIS 1.3; XFEL; X-rays; soft X-rays; Physics and Astronomy;

    Sammanfattning : A Free Electron Laser (FEL), is a device that generates extremely coherent and brilliant radiation using electrons accelerated to relativistic velocities in a particle accelerator. The process utilises similar equipment to what is used at a synchrotron source like MAX IV, but in addition there is an interaction between the relativistic electron beam and the generated radiation to achieve an exponential growth in radiation intensity. LÄS MER

  3. 2. A Comparison Between Applied Square and Ring CSRR on SIW Using the HOM Method

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

    Författare :Carl Nordengren; Johan Bellbrant; [2022]
    Nyckelord :Split-ring resonators; bandgap-filter; higher order modes method; substrate integrated waveguide; periodic structures;

    Sammanfattning : The rise of connected devices and the internet of things has increased the need for systems capable of transmitting high frequency signals wirelessly. An important part of these systems are the filters. Filters remove signals within unwanted frequency ranges. These filters can be implemented using e. LÄS MER

  4. 3. Design of Optical Magnetic Systems for Terahertz Lensing

    Kandidat-uppsats, Uppsala universitet/FREIA

    Författare :Gustav Lidberg; Karl Pontén; Johan Millberg; [2021]
    Nyckelord :Terahertz; Graphene; Optics; Magnets; Optical Magnetic Lens;

    Sammanfattning : When graphene is subjected to magnetic fields, it can be used as an optical device with light in the terahertz region. The functionality of the graphene depends on which magnetic field profile is influencing it. In this project, magnet configurations producing uniform and quadratic magnetic field profiles were studied. LÄS MER

  5. 4. Minskad årsringsbredd hos gran (Picea abies) : - en vitalitetsförlust efterföljande en torkperiod

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Författare :Johan Blomquist; [2020]
    Nyckelord :Spruce; drought; resistograph; spruce bark beetle; year ring width; Gran; torkstress; resistograf; granbarkborre; årsringsbredd;

    Sammanfattning : Effekten av torka på gran kan var stor. Sommaren 2018 var en av de torraste och varmaste somrarna på länge. En sådan period påverkar ofta granars vitalitet negativt och kan leda till en ökad risk för angrepp av granbarkborre. LÄS MER

  7. 5. Ring amplifiers for high speed pipeline assisted SAR ADCs

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

    Författare :Johan Holmstedt; [2020]
    Nyckelord :ADC SAR RAMP ring amp residue amplifier PVT; Technology and Engineering;

    Sammanfattning : This thesis contains a review of published ring amplifier topologies. It is suggested to split the input stage of the ring amplifier into two. In this way, a robust ring amplifier can be designed without stacking the transistors in the second stage of the ring amplifier, boosting its speed properties. LÄS MER