The role of standing wave in the generation of hot electrons by femtosecond laser beams incident on dense ionized target

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00555696" target="_blank" >RIV/61389021:_____/21:00555696 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/21:00357786
Result on the web
<a href="https://aip.scitation.org/doi/10.1063/5.0031555" target="_blank" >https://aip.scitation.org/doi/10.1063/5.0031555</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0031555" target="_blank" >10.1063/5.0031555</a>

Result language
angličtina
Original language name
The role of standing wave in the generation of hot electrons by femtosecond laser beams incident on dense ionized target
Original language description
We demonstrate the differences in hot electron absorption mechanisms dominant in the interaction of a femtosecond laser pulse with intensities of 10 18 W / cm2 and 10 21 W / cm2 on a fully ionized target with a steep density profile and preplasma with moderate scale length (3 μm). We show that acceleration of each electron starts at the moment when the magnetic component of a standing electromagnetic wave changes its polarity in a regime without preplasma. In the presence of preplasma, the stochastic heating is the dominant absorption mechanism along with the longitudinal electric field. It is observed that wave's energy is absorbed only if the standing wave is already created at the position of electron during the interaction with the pulse with an intensity of 10 18 W / cm2. In the case with 10 21 W / cm2 intensity, the part of the electrons is pre-accelerated in front of the target before the reflection and following stochastic heating. The presence of preplasma results in electron temperatures close to or even exceeding ponderomotive scaling. At higher intensity, the re-injection of electrons previously repelled by incident wave's ponderomotive force into high-field regions is allowed if the standing wave is created.
Czech name
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Czech description
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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
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/EF16_019%2F0000778" target="_blank" >EF16_019/0000778: Center for advanced applied science</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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