8–12 Jul 2019
University of Milano-Bicocca UNIMIB
Europe/Rome timezone

P1.2025 Diagnostic of forward fast electrons in femtosecond laser-foil interactions using terahertz radiation

8 Jul 2019, 14:00
2h
Building U6 (University of Milano-Bicocca UNIMIB)

Building U6

University of Milano-Bicocca UNIMIB

Piazza dell’Ateneo Nuovo, 1 20126 Milan, Italy
BPIF Poster P1

Speaker

Y. Li (EPS 2019)

Description

See the full abstract here:
http://ocs.ciemat.es/EPS2019ABS/pdf/P1.2025.pdf

Fast electrons are important for laser-driven x-ray sources, proton acceleration and fast ignition of the inertial confinement fusion. Fast electrons in a solid target can be diagnosed with x-ray emission, proton acceleration and optical transition radiation. However, it is quite challenge to measure their temporal evolution. Recently Terahertz (THz) emission from intense-laser-produced plasmas has attracted much interest since such an emitter could not only be a potential tabletop brilliant THz source, but also a noninvasive diagnostic for fast electrons. We have systematically studied THz radiation from solid targets driven by relativistic laser pulses and found that THz can be generated due to coherent transition radiation (CTR) of the forward fast electrons when they pass the solid-vacuum boundary. We will show using the THz CTR to characterize the temporal history, charge, and divergence angle of the fast forward fast electron beam in a solid target in this presentation.

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