Modelling of pulse train generation for resonant laser wakefield acceleration using a delay mask.

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Title: Modelling of pulse train generation for resonant laser wakefield acceleration using a delay mask.
Authors: Vantaggiato, G.1, Labate, L.1,2 luca.labate@ino.it, Tomassini, P.1, Gizzi, L.A.1,2
Source: Nuclear Instruments & Methods in Physics Research Section A. Nov2018, Vol. 909, p114-117. 4p.
Subjects: Pulsed lasers, Laser plasma accelerators, Plasma acceleration, Resonant states, Parabola
Abstract: Abstract A new method for the generation of a train of pulses from a single high-energy, ultra short pulse is presented, suited for Resonant Multi-Pulse Ionization injection (Tomassini, 2017). The method is based on different transverse portion of the pulse being delayed by a "mask" sectioned in concentric zones with different thicknesses, in order to deliver multiple laser pulses. The mask is placed right before the last focusing parabola. A hole in the middle of the mask lets part of the original pulse to pass through to drive electron injection. In this paper a full numerical modelling of this scheme is presented. In particular we discuss the spatial and temporal profile of the pulses emerging from the mask and how they are related to the radius and thickness of each section. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Abstract A new method for the generation of a train of pulses from a single high-energy, ultra short pulse is presented, suited for Resonant Multi-Pulse Ionization injection (Tomassini, 2017). The method is based on different transverse portion of the pulse being delayed by a "mask" sectioned in concentric zones with different thicknesses, in order to deliver multiple laser pulses. The mask is placed right before the last focusing parabola. A hole in the middle of the mask lets part of the original pulse to pass through to drive electron injection. In this paper a full numerical modelling of this scheme is presented. In particular we discuss the spatial and temporal profile of the pulses emerging from the mask and how they are related to the radius and thickness of each section. [ABSTRACT FROM AUTHOR]
ISSN:01689002
DOI:10.1016/j.nima.2018.02.024