Speaker
João Jorge Santos
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/O4.205.pdf
All-optical laser-based magnetic field generators:
from nano- to picosecond laser regimes
J.J. Santos , Y. Abe , J. Apiñaniz , M. Bailly-Grandvaux , M. Ehret ,
1 2 3 1,4 1,5
S. Fujioka , J.J. Honrubia , M. Huault , E. d’Humières , Ph. Korneev ,
2 6 3 1 7
Y. Kochetkov , K.F.F. Law , S. Malko , A. Morace , M. Roth ,
7 2 3 2 5
G. Schaumann , V. Stepanishchev , V.T. Tikhonchuk , L. Volpe
5 7 1 3
1
Uni. Bordeaux, CNRS, CEA, Centre Lasers Intenses et Applications, Talence, France
2
Institute of Laser Engineering, Osaka University, Suita, Osaka, Japan
3
Centro de Láseres Pulsados, Salamanca, Spain
4
Univ. California San Diego, San Diego, USA
5
Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
6
ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Madrid, Spain
7
National Research Nuclear University MEPhI, Moscow, Russian Federation
Our experiments, along with numerical and theoretical modelling, show and explain the
generation of strong magnetic fields (B-fields), in the range of the kilotesla, using
high-energy nanosecond or high-intensity sub-picosecond lasers interacting with solid
targets of various curved geometries. Such capability paves the ground for novel
magnetized high-energy density physics (HEDP) investigations, related to laser-generated
sources of high-energy particles and their transport, to fusion energy production schemes
and to laboratory astrophysics.
Magnetic fields of nanosecond duration are generated in a coil connected to a
nanosecond laser-driven diode supplying a quasi-stationary electric current. This scheme
was successfully applied for magnetizing solid-density targets and improving the
relativistic electron beam transport in those targets. It is readily usable for other HEDP
applications.
In the sub-picosecond regime, B-fields stem from supra-thermal electron ejection from
the target or from laser-driven electron vortices. Data shows the presence of B-fields for
more than 100 ps, a time scale much longer than the laser pulse duration. When confined
within the target structure, these B-fields can be used for controlling electron and ion
acceleration and guiding.
This work has been carried out within the framework of the EUROfusion Consortium and has received
funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement
number 633053. The views and opinions expressed herein do not necessarily reflect those of the European
Commission.
