Investigations of the spontaneous magnetic fields, electron and ion emissions in the ablative plasma - the latest results performed at PALS

0488352 - ÚFP 2018 PL eng A - Abstract
Dostál, Jan - Pisarczyk, T. - Gus’kov, S.Yu. - Chodukowski, T. - Dudžák, Roman - Korneev, Ph. - Demchenko, N. - Kalinowska, Z. - Rosinski, M. - Parys, P. - Zaras-Szydlowska, A. - Borodziuk, S. - Juha, Libor - Cikhardt, Jakub - Klír, Daniel - Kubeš, P. - Krůs, Miroslav - Hřebíček, Jan - Medřík, Tomáš - Golasowski, Jiří - Pfeifer, Miroslav - Renner, Oldřich - Singh, S. - Skála, Jiří - Pisarczyk, P.
Investigations of the spontaneous magnetic fields, electron and ion emissions in the ablative plasma - the latest results performed at PALS.
PLASMA 2017 – International Conference on Research and Application of Plasmas. Warsaw: Institute of Plasma Physics and Laser Microfusion (IPPLM), 2017. O6.6. ISBN N. ISSN N.
[PLASMA 2017 – International Conference on Research and Application of Plasmas. 18.09.2017-22.09.2017, Warsaw]
Institutional support: RVO:61389021
Keywords : Spontaneous magnetic fields (SMF) * PALS
OECD category: Fluids and plasma physics (including surface physics)

Spontaneous magnetic fields (SMF) in laser-plasma interaction is an important object being extensively studied both experimentally and theoretically. Many phenomena in space and technology may become clearer due to the better understanding of the SMF physics. This paper presents the latest results of the direct space-time resolved measurements of the SMF performed at PALS (Prague Asterix Laser System) facility. To improve credibility of the SMF measurements, the two-frame polaro-interferometric system, driven by a Ti:Sa laser pulse with the wavelength of 808 nm and the 40 fs pulse duration was used for the first time. To receive two frames with a given time delay, the polaro-interferometer is equipped with two one-frame polaro-interferometer modules operating in the complex interferometry regime. The experiments were performed by using of the 1 single beam of the iodine laser (1.315 m) with linear and circular polarization, focused to the focal spot radius RL=50 m at the planar massive targets made of light (Al) and heavy (Cu) materials. To obtain information about parameters of the electron emission (such as their density and energy spectrum) two spectroscopic systems were used: (i) 2D imaging of the fast electron distribution based on detection of the Kα line emission from Cu and (ii) multichannel magnetic electron spectrometer. The ion emission measurements was performed with the system of several grid collectors. Additionally, the total electric current in the target support was measured using the current probe.

Permanent Link: http://hdl.handle.net/11104/0283001