Relativistic effects in plasma produced with sub-nanosecond 3-TW laser

0503384 - ÚFP 2019 RIV FR eng C - Conference Paper (international conference)
Krása, J. - Klír, Daniel - Řezáč, Karel - Cikhardt, Jakub - Krůs, Miroslav - Velyhan, Andriy - Pfeifer, Miroslav - Dostál, Jan - Dudžák, Roman - Krupka, Michal - Kaufman, J. - Pisarczyk, T. - Kalinowska, Z. - Chodukowski, T.
Relativistic effects in plasma produced with sub-nanosecond 3-TW laser.
45th EPS Conference on Plasma Physics. Vol. 42A. Mulhouse: European Physical Society, 2018, s. 1700-1703, č. článku 141703. ISBN 9781510868441.
[EPS Conference on Plasma Physics. Praha (CZ), 02.07.2018-06.07.2018]
R&D Projects: GA MŠMT(CZ) LM2015083; GA MŠMT EF16_013/0001552
Institutional support: RVO:61389021
Keywords : laser-produced plasma * relativistic electrons
OECD category: Fluids and plasma physics (including surface physics)
http://ocs.ciemat.es/EPS2018PAP/pdf/P5.2015.pdf

This contribution deals with observations of relativistic electrons produced in a laser plasma interaction experiment at the PALS laser system operated at the Institute of Plasma Physics in Prague. The PALS laser is a near-infrared 3-TW iodine laser designed to deliver irradiance on target of 1016 Wcm2- in≈300 ps pulses at the wavelength of 1.315 μm. Various foils of 6 500 μm in thickness were irradiated with Iλ2 ≈5×1016 W cm-2 μm2 Under these conditions we have observed relativistic electrons expanding into the vacuum with maximum energy going beyond 4 MeV. The relativistically accelerated forward electrons escaping from the rear target surface were observed with the use of electron energy analysers. The observed electron energy spectra indicate that the applied laser intensity was increased by the thermal and relativistic self-focusing. The application of a unique femtosecond interferometry technique allowed us to observe bunches of thermal electrons occurring in the plasma expanding against the focused laser beam.
Permanent Link: http://hdl.handle.net/11104/0295204