Sökning: "Alex Ellgren"

Hittade 2 uppsatser innehållade orden Alex Ellgren.

1. 1. Analysis of vortex movement in an YBCO thin film : Models of the vortex solid-to-liquid transition compared to a sensitive resistive measurement of a strongly pinned YBCO thin film

   Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Författare :Alex Ellgren; [2013]
   Nyckelord :High-temperature superconductor; YBCO; vortex dynamics; glass transition; vortex glass; vortex molasses;

   Sammanfattning : When a high-temperature superconductor transitions in the presence of a magnetic field, the resistance does not immediately go to zero. Instead, the transition is smoothed by the resistive effects of moving vortices so that perfect conductivity isn't reached until several K below Tc, where the vortices have frozen into a glass state. LÄS MER

3. 2. Simulation of Avalanche breakthroughin Si and SiC

   Kandidat-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Författare :Alex Ellgren; [2012]
   Nyckelord :;

   Sammanfattning : This paper describes a Monte Carlo simulation of avalanche breakthrough in Si and SiC, which is intended as a teaching aid in introductory courses on semiconductor devices. The model used approximates the charge carriers as hard balls bouncing o each other and transferring kinetic energy between themselves, with ionizations being recorded when EKin > Eg. LÄS MER