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Plasma channel formation in the knife-like focus of laser beam

Published online by Cambridge University Press:  02 June 2020

O. G. Olkhovskaya ,
G. A. Bagdasarov ,
N. A. Bobrova ,
V. A. Gasilov ,
L. V. N. Goncalves ,
C. M. Lazzarini ,
M. Nevrkla ,
G. Grittani ,
S. S. Bulanov  and
A. J. Gonsalves
...Show all authors
O. G. Olkhovskaya
Affiliation:
Keldysh Institute of Applied Mathematics, Moscow, 125047, Russia
G. A. Bagdasarov
Affiliation:
Keldysh Institute of Applied Mathematics, Moscow, 125047, Russia
N. A. Bobrova
Affiliation:
Keldysh Institute of Applied Mathematics, Moscow, 125047, Russia Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 115 19 Prague 1, Czech Republic
V. A. Gasilov
Affiliation:
Keldysh Institute of Applied Mathematics, Moscow, 125047, Russia
L. V. N. Goncalves
Affiliation:
Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
C. M. Lazzarini
Affiliation:
Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
M. Nevrkla
Affiliation:
Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 115 19 Prague 1, Czech Republic Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
G. Grittani
Affiliation:
Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
S. S. Bulanov
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA94720, USA
A. J. Gonsalves
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA94720, USA
C. B. Schroeder
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA94720, USA
E. Esarey
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA94720, USA
W. P. Leemans
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA94720, USA Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607Hamburg, Germany
P. V. Sasorov*
Affiliation:
Keldysh Institute of Applied Mathematics, Moscow, 125047, Russia Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
S. V. Bulanov
Affiliation:
Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic Prokhorov General Physics Institute RAS, Vavilov Str. 38, Moscow119991, Russia National Institutes for Quantum and Radiological Science and Technology (QST),Kansai Photon Science Institute, 8-1-7 Umemidai, Kizugawa,Kyoto, 619-0215, Japan
G. Korn
Affiliation:
Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines, 182 21 Prague, Czech Republic
*
†Email address for correspondence: [email protected]
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Abstract

The plasma channel formation in the focus of a knife-like nanosecond laser pulse irradiating a gas target is studied theoretically, and in gas-dynamics computer simulations. The distribution of the electromagnetic field in the focus region, obtained analytically, is used to calculate the energy deposition in the plasma, which then is implemented in the magnetohydrodynamic computer code. The modelling of the channel evolution shows that the plasma profile, which can guide the laser pulse, is formed by the tightly focused short knife-like lasers. The results of the simulations show that a proper choice of the convergence angle of a knife-like laser beam (determined by the focal length of the last cylindrical lens), and laser pulse duration may provide a sufficient degree of azimuthal symmetry of the formed plasma channel.

Keywords

plasma dynamicsplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 86 , Issue 3 , June 2020 , 905860307
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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