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Hot electron and x-ray generation by sub-ns kJ-class laser-produced tantalum plasma
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SYSNO ASEP 0563641 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hot electron and x-ray generation by sub-ns kJ-class laser-produced tantalum plasma Author(s) Singh, Sushil K. (FZU-D) ORCID
Krupka, Michal (FZU-D) ORCID
Istokskaia, Valeria (FZU-D) ORCID
Krása, Josef (FZU-D) RID, ORCID
Giuffrida, Lorenzo (FZU-D) ORCID
Dudžák, Roman (FZU-D) RID, ORCID
Dostál, Jan (FZU-D) ORCID
Burian, Tomáš (FZU-D) RID, ORCID
Versaci, Roberto (FZU-D) ORCID
Margarone, Daniele (FZU-D) RID, ORCID
Pisarczyk, T. (PL)
Krůs, M. (CZ)
Juha, Libor (FZU-D) RID, ORCID, SAINumber of authors 13 Article number 105012 Source Title Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 64, č. 10 (2022)Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords laser-produced tantalum plasma ; bremsstrahlung emission ; x-ray sources ; electron energy distribution ; x-ray from kJ-ns laser ; electron and x-ray generation Subject RIV BH - Optics, Masers, Lasers OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2018114 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-02545S GA ČR - Czech Science Foundation (CSF) EF16_019/0000789 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000850674200001 EID SCOPUS 85137854768 DOI 10.1088/1361-6587/ac8bf3 Annotation This paper presents experimental investigation of temperature scaling and threshold of instability in hot electron and bremsstrahlung radiation from the interaction of sub-nanosecond and kilo-joule class laser pulses with a tantalum foil target at Prague Asterix Laser System. The laser intensity was varied between 4×1015 and 3×1016 W·cm−2 at the target focus. The energy distribution functions of electrons were measured by an angular array of magnetic spectrometers indicating the electron temperature in the range between 30 keV and 70 keV. The bremsstrahlung spectrum was characterized using a scintillator-based calorimeter. In particular, we show the laser-energy scaling of the total flux of hot electrons in the forward and backward directions with respect to the laser vector, the conversion efficiency of the laser energy to the energy carried by hot electrons, and the temperature of hot electrons. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://doi.org/10.1088/1361-6587/ac8bf3
Number of the records: 1