Sökning: "Johnny Ljung"

Hittade 2 uppsatser innehållade orden Johnny Ljung.

1. 1. Track Before Detect in Active Sonar Systems

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

   Författare :Johnny Ljung; [2021]
   Nyckelord :signal processing; active sonar systems; track-before-detect; target tracking; reverberation; signalbehandling; aktiva sonarsystem; spårning innan detektion; målspårning; reverberation;

   Sammanfattning : Detection of an underwater target with active sonar in shallow waters such as the Baltic sea is a big challenge. This since the sound beams from the sonar will be reflected on the surfaces, sea surface and sea bottom, and the water volume itself which generates reverberation. LÄS MER

3. 2. Design of an X-ray transfer beamline for the Soft X-ray project at MAX IV

   Kandidat-uppsats,

   Författare :Milad Emadi; Sofia Tynelius; Patric Beas Peterson; Johnny Ljung; [2019]
   Nyckelord :optics; focusing; beam; x-ray; MAX-IV; soft x-ray; transfer; matrix;

   Sammanfattning : At the MAX-IV lab in Lund, there is a current goal to build a new soft X-Ray laser. The beam will be generated from a free-electron laser (FEL), which is an instrument consisting of high-speed electrons. The electrons move through alternating magnetic fields, causing the beam to become monochromatic. LÄS MER