Betatron radiation emitted during the direct laser acceleration of electrons in underdense plasmas
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00648097" target="_blank" >RIV/61389021:_____/25:00648097 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6587/adf50b" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6587/adf50b</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6587/adf50b" target="_blank" >10.1088/1361-6587/adf50b</a>
Alternative languages
Result language
angličtina
Original language name
Betatron radiation emitted during the direct laser acceleration of electrons in underdense plasmas
Original language description
Relativistic laser pulses can accelerate electrons up to energies of several GeV during their interaction with gaseous targets through the direct laser acceleration (DLA) mechanism. While the electrons are accelerated to high energies, they oscillate transversely to the laser propagation direction, emitting radiation. We demonstrate using particle-in-cell (PIC) simulations that the high accelerated electron charge enables DLA sources to emit ∼ 10 10 photons/0.1% bandwidth (BW) at energies of hundreds of MeV when interacting with multi-petawatt (PW) laser pulses. We provide an analytical estimate of the expected critical frequency for the DLA betatron spectrum which is in strong agreement with PIC simulations. We also show that using gas jets of low density ( ∼ 10 19 cm<sup>−3</sup>) is beneficial for the brightness of the source, since low plasma density produces collimated radiation. If the laser pulse is focused to an optimal spot size that results in the highest cut-off energies, the conversion efficiency from laser to radiation can reach up to a few percent, which makes DLA a promising high-brilliance source of gamma-ray radiation.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plasma Physics and Controlled Fusion
ISSN
0741-3335
e-ISSN
1361-6587
Volume of the periodical
67
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
085019
UT code for WoS article
001550091600001
EID of the result in the Scopus database
2-s2.0-105013396171