Implementation of amplitude-phase analysis of complex interferograms for measurement of spontaneous magnetic fields in laser generated plasma

0541476 - ÚFP 2022 RIV US eng J - Článek v odborném periodiku
Zaraś-Szydłowska, A. - Pisarczyk, T. - Chodukowski, T. - Rusiniak, Z. - Dudžák, Roman - Dostál, Jan - Kálal, Milan - Kochetkov, Iu. - Krupka, Michal - Borodziuk, S. - Pisarczyk, P.
Implementation of amplitude-phase analysis of complex interferograms for measurement of spontaneous magnetic fields in laser generated plasma.
AIP Advances. Roč. 10, č. 11 (2020), č. článku 115201. E-ISSN 2158-3226
Grant CEP: GA MŠMT(CZ) LM2015083; GA MŠMT EF16_013/0001552; GA ČR(CZ) GA19-24619S
GRANT EU: European Commission(XE) 654148 - LASERLAB-EUROPE
Institucionální podpora: RVO:61389021
Klíčová slova: complex interferograms * laser generated plasma
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.548, rok: 2020
Způsob publikování: Open access
https://aip.scitation.org/doi/pdf/10.1063/5.0020511

Generation of spontaneous magnetic fields (SMFs) is one of the most interesting phenomena accompanying an intense laser-matter interaction. One method of credible SMFs measurements is based on the magneto-optical Faraday effect, which requires simultaneous measurements of an angle of polarization plane rotation of a probe wave and plasma electron density. In classical polaro-interferometry, these values are provided independently by polarimetric and interferometric images. Complex interferometry is an innovative approach in SMF measurement, obtaining information on SMF directly from a phase-amplitude analysis of an image called a complex interferogram. Although the theoretical basis of complex interferometry has been well known for many years, this approach has not been effectively employed in laser plasma research until recently - this approach has been successfully implemented in SMF measurement at the Prague Asterix Laser System (PALS). In this paper, proprietary construction solutions of polaro-interferometers are presented - they allow us to register high-quality complex interferograms in practical experiments, which undergo quantitative analysis (with an original software) to obtain information on the electron density and SMFs distributions in an examined plasma. The theoretical foundations of polaro-interferometric measurement, in particular, complex-interferometry, are presented. The main part of the paper details the methodology of the amplitude-phase analysis of complex interferograms. This includes software testing and examples of the electron density and SMF distribution of a laser ablative plasma generated by irradiating Cu thick planar targets with an iodine PALS laser at an intensity above about 1016 W/cm2.
Trvalý link: http://hdl.handle.net/11104/0319027