Počet záznamů: 1
The role of standing wave in the generation of hot electrons by femtosecond laser beams incident on dense ionized target
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SYSNO ASEP 0555696 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The role of standing wave in the generation of hot electrons by femtosecond laser beams incident on dense ionized target Tvůrce(i) Babjak, Róbert (UFP-V)
Pšikal, J. (CZ)Celkový počet autorů 2 Číslo článku 023107 Zdroj.dok. Physics of Plasmas - ISSN 1070-664X
Roč. 28, č. 2 (2021)Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova wave ; femtosecond ; dense ionized target Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) CEP EF16_019/0000778 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000630455900001 EID SCOPUS 85101024922 DOI 10.1063/5.0031555 Anotace 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2022 Elektronická adresa https://aip.scitation.org/doi/10.1063/5.0031555
Počet záznamů: 1