Essays about: "André Löfgren"

Found 3 essays containing the words André Löfgren.

1. 1. Simulations of the inuence of atomic vibrations on the magneticsignal observed in scattering of electron vortex beams on bcc ironcrystal

   University essay from Uppsala universitet/Materialteori

   Author : André Löfgren; [2019]
   Keywords : ;

   Abstract : .... READ MORE

3. 2. Numerical ice sheet modelling using FEniCS

   University essay from Uppsala universitet/Institutionen för informationsteknologi

   Author : André Löfgren; [2019]
   Keywords : ;

   Abstract : The increase in computational power in the last 20 years has made it feasible to solve the full Stokes equation for ice flow, using finite element methods (FEM). However, the numerical properties of these equations remains largely unknown. This is due to their nonlinear nature, which makes them hard to analyze mathematically. READ MORE

4. 3. Detection of electron vortex beams : Using a scanning transmission electron microscope

   University essay from Uppsala universitet/Materialteori

   Author : André Löfgren; [2015]
   Keywords : microscopy; electron; vortex; beam; microscope; detection; detecting; doughnuts; microscopy; STEM; scanning; transsmision; mikroskopi; elektronvirvelstråle; elektronvirvelstrålar; elektron; stråle; virvel; munk; munkar; elektrontransmissionsmikroskop; elektronmikroskop; transmissionsmikroskop; detektera; detektering;

   Abstract : Electron vortex beams (EVBs) are electron beams with a doughnut-like intensity profile, carrying orbital angular momentum due to their helical phase shift distribution. When employed in an electron microscope, they are expected to be efficient for the detection of magnetic signals. READ MORE