Abstract
Abstract
The formation and evolution of post-solitons has been discussed for quite some time both analytically and through the use of particle-in-cell (PIC) codes. It is however only recently that they have been directly observed in laser-plasma experiments. Relativistic electromagnetic (EM) solitons are localised structures that can occur in collisionless plasmas. They consist of a low-frequency EM wave trapped in a low electron number-density cavity surrounded by a shell with a higher electron number-density. Here we describe the results of an experiment in which a 100 TW Ti:sapphire laser (30 fs, 800 nm) irradiates a
0.03
g
c
m
−
3
TMPTA foam target with a focused intensity
I
l
=
9.5
×
10
17
W
c
m
−
2
. A third harmonic (
λ
p
r
o
b
e
≃
266
nm) probe is employed to diagnose plasma motion for 25 ps after the main pulse interaction via Doppler-Spectroscopy. Both radiation-hydrodynamics and 2D PIC simulations are performed to aid in the interpretation of the experimental results. We show that the rapid motion of the probe critical-surface observed in the experiment might be a signature of post-soliton wall motion.
Funder
FP7 Ideas: European Research Council
Engineering and Physical Sciences Research Council
National Science Foundation USA
Science and Engineering Research Board
Subject
Condensed Matter Physics,Nuclear Energy and Engineering
Cited by
1 articles.
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