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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:20 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Solid State Physics and Materials Science, Optics, Spectroscopy, Plasma and Lasers
Title:
Plasma imaging diagnostics for high power lasers experiments
Authors:
Alexandru MĂGUREANU (1,2), Septimiu BĂLĂȘCUȚĂ (1), Petru GHENUCHE(1), Mihail O. CERNĂIANU(1), Ana-M. LUPU(1,3), Bogdan DIACONESCU(1), Cătălin M. TICOȘ(1,2), Domenico DORIA(1)
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Affiliation:
1) Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Extreme Light Infrastructure Nuclear Physics, Măgurele, 077125, ILFOV county, Romania;
2) Engineering and Applications of Lasers and Accelerators Doctoral School (SDIALA), University Politehnica of Bucharest, Bucharest, Romania;
3) Applied Chemistry and Materials Science" Doctoral School Doctoral School, University Politehnica of Bucharest, Bucharest, Romania
E-mail
alexandru.magureanu@eli-np.ro
Keywords:
laser-plasma interaction, shadowgraphy, high power laser
Abstract:
Plasma imaging diagnostics are powerful tools in high-power laser-driven experiments that provide real-time information about the interaction. In this work, we describe the design of a shadowgraphy system equipped with either a standard CCD camera or a wavefront sensor camera. We also report on the results attained during the commissioning campaign of the 1 PW laser of the ELI-NP facility [1]. The 1 PW laser system has a maximum beam energy of 24 J, with pulse duration and central wavelength of 24 fs and 810 nm, respectively [2]. The shadowgraphy was performed by using a probe beam with the fundamental wavelength of the laser and synchronizing it with the main laser beam. This technique was used for imaging the interaction of the focused laser beam with either a solid target or a gas cell target. The shadowgraphy with the wavefront sensor was employed with gas targets, in the laser-driven electron acceleration experiment, to measure the phase change of the wavefront of the probe beam after passing throughout the plasma channel generated during the acceleration process. This wavefront modification provides information about the electron plasma density. The standard shadowgraphy was used with solid targets during the TNSA experiment to attain information about the laser temporal contrast by looking at pre-plasma signature in the interaction.
References:
[1] K. A. Tanaka, K. M. Spohr, D. L. Balabanski et all, Current status and highlights of the ELI-NP research program. Matter and Radiation at Extremes vol.5, p. 024402 (2020)
[2] F. Lureau, G. Matras, O. Chalus et all, High-Energy Hybrid Femtosecond Laser System Demonstrating 2 × 10 PW Capability, High Power Laser Science and Engineering, vol.5, p. e43 (2020)
Acknowledgement:
Acknowledgement: The work reported was supported by the Project Extreme Light Infrastructure Nuclear Physics (ELI-NP) Phases I (475/12.12.2012) and II (1/07.07.2016), a project co-financed by the Romanian Government and European Union through the European Regional Development Fund. The authors also acknowledge the support of the Romanian Ministry of Education and Research through the PN 19060105 project. The authors also thank the laser team of ELI-NP, Thales team, and other members of LDED for technical support.
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