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Features of the generation of fast particles from microstructured targets irradiated by high intensity, picosecond laser pulses

Published online by Cambridge University Press:  23 April 2019

M.V. Sedov Open the ORCID record for M.V. Sedov [Opens in a new window] ,
A.Ya. Faenov ,
A.A. Andreev ,
I.Yu. Skobelev ,
S.N. Ryazantsev ,
T.A. Pikuz ,
P. Durey ,
L. Doehl ,
D. Farley  and
C.D. Baird
...Show all authors
M.V. Sedov*
Affiliation:
Saint-Petersburg State University, 199034 Universitetskaya Emb. 7-9, St. Petersburg, Russia
A.Ya. Faenov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow 125412, Russia Open and Transdisciplinary Research Initiative, Osaka University, Osaka 565-0871, Japan
A.A. Andreev
Affiliation:
Saint-Petersburg State University, 199034 Universitetskaya Emb. 7-9, St. Petersburg, Russia ELI-ALPS, H-6720 Dugonics ter 15, Szeged, Hungary MBI, 12489 Max-Born str. 2a, Berlin, Germany
I.Yu. Skobelev
Affiliation:
Joint Institute for High Temperatures RAS, Moscow 125412, Russia National Research Nuclear University “MEPhI”, Moscow 115409, Russia
S.N. Ryazantsev
Affiliation:
Joint Institute for High Temperatures RAS, Moscow 125412, Russia
T.A. Pikuz
Affiliation:
Joint Institute for High Temperatures RAS, Moscow 125412, Russia Graduated School of Engineering, Osaka University, Osaka 565-0871, Japan
P. Durey
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
L. Doehl
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
D. Farley
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
C.D. Baird
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
K.L. Lancaster
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
C.D. Murphy
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
N. Booth
Affiliation:
Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
C. Spindloe
Affiliation:
Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
K.Yu. Platonov
Affiliation:
Peter the Great St. Petersburg Polytechnic University, 195251 Polytechnicheskaya st. 29, St. Petersburg, Russia
P. McKenna
Affiliation:
Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, UK
R. Kodama
Affiliation:
Open and Transdisciplinary Research Initiative, Osaka University, Osaka 565-0871, Japan Graduated School of Engineering, Osaka University, Osaka 565-0871, Japan
N. Woolsey
Affiliation:
York Plasma Institute, Department of Physics, University of York, York YO10 5DD, UK
S.A. Pikuz
Affiliation:
Joint Institute for High Temperatures RAS, Moscow 125412, Russia National Research Nuclear University “MEPhI”, Moscow 115409, Russia
*
Author for correspondence: M.V. Sedov, Saint-Petersburg State University, Physical Department, Ulianovskaya st.3, Saint-Petersburg 198504, Russia. E-mail: m.sedov@spbu.ru
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Abstract

The use of targets with surface structures for laser-driven particle acceleration has potential to significantly boost the particle and radiation energies because of enhanced laser absorption. We investigate, via experiment and particle-in-cell simulations, the impact of micron-scale surface-structured targets on the spectrum of electrons and protons accelerated by a picosecond laser pulse at relativistic intensity. Our results show that, compared with flat-surfaced targets, structures on this scale give rise to a significant enhancement in particle and radiation emission over a wide range of laser–target interaction parameters. This is due to the longer plasma scale length when using micro-structures on the target front surface. We do not observe an increase in the proton cutoff energy with our microstructured targets, and this is due to the large volume of the relief.

Keywords

Laser–plasma interactionplasma line emissionstructured target

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Type
Research Article
Information
Laser and Particle Beams , Volume 37 , Issue 2 , June 2019 , pp. 176 - 183
Copyright
Copyright © Cambridge University Press 2019 

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