Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F23%3A00368658" target="_blank" >RIV/68407700:21230/23:00368658 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3389/fphy.2023.1178967" target="_blank" >https://doi.org/10.3389/fphy.2023.1178967</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3389/fphy.2023.1178967" target="_blank" >10.3389/fphy.2023.1178967</a>
Alternative languages
Result language
angličtina
Original language name
Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material
Original language description
High performance of laser-driven sources of radiation is in focus of research aimed at the study of high energy density matter, pair production and neutron generation using kJ PW-laser systems. In this work, we present a highly efficient approach to generate an ultra-high flux, high-energy bremsstrahlung in the interaction of direct laser-accelerated (DLA) electrons with a several-millimeters-thick high-Z converter. A directed beam of direct laser-accelerated electrons with energies up to 100 MeV was produced in the interaction of a sub-ps laser pulse of moderate relativistic intensity with long-scale plasma of near-critical density obtained by irradiation of low-density polymer foam with an ns laser pulse. In the experiment, tantalum isotopes generated via photonuclear reactions with threshold energies above 40 MeV were observed. The Geant4 Monte Carlo code, with the measured electron energy and angular distribution as input parameters, was used to characterize the bremsstrahlung spectrum responsible for the registered yields of isotopes from Ta-180 to Ta-175. It is shown that when the direct laser-accelerated electrons interact with a tantalum converter, the directed bremsstrahlung with an average photon energy of 18 MeV and similar to 2 center dot 10(11) photons per laser shot in the energy range of giant dipole resonance (GDR) and beyond (>= 7.5 MeV) is produced. This results in an ultra-high photon flux of similar to 6 x 10(22) sr(-1)center dot s(-1) and a record conversion efficiency of 2% of the focused laser energy into high-energy bremsstrahlung.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GM23-05027M" target="_blank" >GM23-05027M: Strong electromagnetic pulses: their generation, characterization and control</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Frontiers in Physics
ISSN
2296-424X
e-ISSN
2296-424X
Volume of the periodical
11
Issue of the periodical within the volume
May
Country of publishing house
CH - SWITZERLAND
Number of pages
11
Pages from-to
1-11
UT code for WoS article
001000390300001
EID of the result in the Scopus database
2-s2.0-85159879060