Diploma Work


Contents


Works towards and within my Diploma Work

My Diploma Work
Theme of my diploma work were aspects of laser-matter interaction at high intensities. By relativistiv effects from lasers in the near infrared and in the range of visible light, which reach intensities of more than 1016-1018 W/cm², the linear theory (as used for the description for faith nonlinear systems) must be modified.
There devellops a very effectiv coupling of the laser puls envelope to the underdense plasma, where the laser can transform a remarkable part of its energy into plasma oszillations. By that means electrical and magnetical wake-fields are stimmulated, which consume their energy slowly by electron-electron- and electron-ion-collisions.
 
Single Particle Calculations
During checks for my diploma work, I was also occupied with single particle calculations concerning the laser-particle-interaction. There I inspected particle movements in areas, where high laser intensities meet with overdense plasma.
 
Parallelised PIC-Code
For better understanding of laser-plasma-interaction, I wrote a 2d-PIC-Code during my diploma work. It used the pvm library for parallelising the code. As computer I used a (for most applications oversized) standard PC with two processors of type P-II 400 MHz, 512 MBytes of RAM and two (striped) 10 GByte IDE Harddisks. During my diploma work, the system ran under Linux, where I learned to grant the stable multi-processing facities of Linux (much in contrast to that, what Microsoft dared to deliver at that time for multi-processor support - that was mere a "multi processor crash help", so instable was NT 4.0 on a dual processor system).
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Edited by Axel Farr.
Stand: 24. August 2011.