Speaker
Gianluca Vantaggiato
(Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche)
Description
The use of laser pulse trains is one of the promising methods to achieve laser wakefield
acceleration because of the low-energy requirements and high repetition rate.
A new design for the generation of a suitable train of pulses from a single highenergy
fast pulse is presented, exploiting optical properties of the main pulse impacting,
just before the last focusing mirror, on a “mask” sectioned in concentric
zones with different thickness, in order to deliver multiple laser pulses. A hole in
the middle of the mask lets part of the original pulse to pass through and provide
electron injection.
In the poster we will show how spatial and temporal profile of the laser emerging
from each section are related to their radius and thickness. In particular we
use (i) a self-developed code based on diffraction theory to calculate the e.m. field
at the focus plane of an off-axis parabolic mirror, (ii) Mirò simulations to evaluate
the effects on the pulse duration (iii) analytical solution for the time separation of
the pulses. From this characterization it is possible to perform plasma wakefield
simulations and use the results as feedback for the choice of different mask’s parameters.
Primary author
Gianluca Vantaggiato
(Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche)
Co-authors
Leonida Antonio Gizzi
(PI)
Luca Umberto Labate
(PI)
Dr
Paolo Tomassini
(INO-CNR)
