Measurement of strong electromagnetic pulses generated from solid targets at sub-ns kJ-class PALS laser facility

0543762 - FZÚ 2022 RIV GB eng J - Journal Article
Rączka, P. - Cikhardt, J. - Pfeifer, Miroslav - Krása, Josef - Krupka, Michal - Burian, Tomáš - Krůs, M. - Pisarczyk, T. - Dostál, Jan - Dudžák, Roman - Badziak, J.
Measurement of strong electromagnetic pulses generated from solid targets at sub-ns kJ-class PALS laser facility.
Plasma Physics and Controlled Fusion. Roč. 63, č. 8 (2021), č. článku 085015. ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA MŠMT(CZ) LM2018114; GA ČR GA19-02545S
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
Institutional support: RVO:68378271
Keywords : electromagnetic pulses * D-dot probes * hot electrons * laser-plasma interactions
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.532, year: 2021
Method of publishing: Open access

Measurements had been performed of strong electromagnetic pulses (EMPs) generated as a result of laser–target interaction at the sub-ns kJ-class Prague Asterix Laser System facility. Two conductive Prodyn FD5C D-dot pencil probes were used. Measurements were performed inside the experimental chamber and outside the chamber in a large chamber window 40 cm in diameter in a setup that guaranteed 6 GHz bandwidth. The EMP signal in the time domain was found to have the form of a sharp initial spike followed by gradually decaying oscillations interspersed with some secondary spikes. The values of the vertical component of the electric field strength were estimated. The highest value recorded in this experiment was 620+260−180 kV m−1 at a distance of 40 cm from the target. It was observed that plastic targets—particularly the 100s of μm thick plastic foils—tend to generate stronger EMP fields than Cu and Au targets.
Permanent Link: http://hdl.handle.net/11104/0320907