Sökning: "Kristoffer Svensson"

Hittade 3 avhandlingar innehållade orden Kristoffer Svensson.

  1. 1. Experiments on Laser-Based Particle Acceleration : Beams of Energetic Electrons and Protons

    Författare :Kristoffer Svensson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laser; plasma; acceleration; electrons; protons; Fysicumarkivet A:2016:Svensson;

    Sammanfattning : This thesis describes experiments involving laser-plasma-based acceleration of electrons and protons, using the techniques of laser wakefield acceleration (LWFA) and target normal sheath acceleration (TNSA). By using extremely high accelerating field strengths, up to the order of TV m-1, it is possible to reach high kinetic particle energies over very short distances. LÄS MER

  3. 2. Laser-Produced Plasmas for Particle Acceleration

    Författare :Kristoffer Svensson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes experimental studies that aim to stabilise and optimise laser-based particle accelerators. The technique is called laser wakefield acceleration, where electric fields of the order of 102 GV/m accelerate electrons to high energies (⇠102 MeV) over mm-distances in laser-produced plasmas. LÄS MER

  4. 3. Kritiskt tänkande i samhällskunskap : En studie som ur ett fenomenografiskt perspektiv belyser manifesterat kritiskt tänkande bland elever i grundskolans år 9

    Författare :Kristoffer Larsson; Bengt Schüllerqvist; Héctor Pérez Prieto; Lennart Svensson; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; critical thinking; higher-order thinking; problem solving; phenomenography; variation theory; civics; social studies; students; compulsory school; ninth-grade; Pedagogiskt arbete; Educational Work;

    Sammanfattning : In this study a phenomenographic theoretical perspective is taken as departure for research on manifested critical thinking in civics among Swedish ninth-grade compulsory school students.According to the phenomenographic perspective students’ manifestations of critical thinking are linked to the way of experiencing the phenomena inducing a manifestation of critical thinking. LÄS MER