Models of sub-cycle electromagnetic pulse generation in laser-plasma interaction
Typ
Examensarbete för masterexamen
Program
Physics and astronomy (MPPAS), MSc
Publicerad
2020
Författare
Olofsson, Christoffer
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Sub-cycle pulses are ultra-short laser pulses containing less than a single oscillation
and are essential tools in the study of matter at the shortest timescales. It has
been recently proposed that such pulses can be attained by letting laser pulses
interact with a plasma to generate amplified and compressed pulses. In the scheme
of laser wakefield driven amplification (LWDA), an initial seed pulse is modulated by
traveling electron plasma waves, forming amplified sub-cycle pulses. In this thesis we
investigate the underlying mechanism of sub-cycle pulse generation in the scheme
of LWDA. An analytical approach using the method of Green’s functions is used
in conjunction with particle-in-cell simulations. Moreover, a custom code solving
Maxwell’s equations with a source term given by a non-linear plasma wave model is
implemented and its results compared with particle-in-cell simulations.
Beskrivning
Ämne/nyckelord
laser , plasma , ultra-short , non-linear , wakefield , sub-cycle , optics