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7 results on '"Vicentiu Iancu"'

1. Influence of Spatio-Temporal Couplings on Focused Optical Vortices

Author

Anda-Maria Talposi, Vicentiu Iancu, and Daniel Ursescu

Subjects
high-power lasers, ultra-short pulses, helical phase, optical vortex, spatio-temporal couplings, laser pulse propagation, Applied optics. Photonics, TA1501-1820
Abstract

Ultra-intense laser pulses with helical phases are of interest in laser-driven charged particle acceleration and related experiments with extreme light. However, such optical vortices can be affected by the presence of residual spatial-temporal couplings. Their field distributions after propagating in free-space and in the focal plane of an ideal focusing mirror were assessed through numerical modeling, based on the Gaussian decomposition method for a 25 fs pulse with a Supergaussian spatial profile. The wash-out of the central hole in the doughnut-shaped profile in the focal plane corresponds to the rotation of the phase discontinuity.

Published
2022
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2. Stability of Antimicrobial Drug Molecules in Different Gravitational and Radiation Conditions in View of Applications during Outer Space Missions

Author

Ágota Simon, Adriana Smarandache, Vicentiu Iancu, and Mihail Lucian Pascu

Subjects
drug stability, pharmacokinetics/pharmacodynamics, hypergravity, microgravity, spaceflight environment, multiple drug resistance, Organic chemistry, QD241-441
Abstract

The evolution of different antimicrobial drugs in terrestrial, microgravity and hypergravity conditions is presented within this review, in connection with their implementation during human space exploration. Drug stability is of utmost importance for applications in outer space. Instabilities may be radiation-induced or micro-/hypergravity produced. The antimicrobial agents used in space may have diminished effects not only due to the microgravity-induced weakened immune response of astronauts, but also due to the gravity and radiation-altered pathogens. In this context, the paper provides schemes and procedures to find reliable ways of fighting multiple drug resistance acquired by microorganisms. It shows that the role of multipurpose medicines modified at the molecular scale by optical methods in long-term space missions should be considered in more detail. Solutions to maintain drug stability, even in extreme environmental conditions, are also discussed, such as those that would be encountered during long-duration space exploratory missions. While the microgravity conditions may not be avoided in space, the suggested approaches deal with the radiation-induced modifications in humans, bacteria and medicines onboard, which may be fought by novel pharmaceutical formulation strategies along with radioprotective packaging and storage.

Published
2021
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3. 10 PW peak power femtosecond laser pulses at ELI-NP

Author

Christophe Radier, Olivier Chalus, Mathilde Charbonneau, Shanjuhan Thambirajah, Guillaume Deschamps, Stephane David, Julien Barbe, Eric Etter, Guillaume Matras, Sandrine Ricaud, Vincent Leroux, Caroline Richard, François Lureau, Andrei Baleanu, Romeo Banici, Andrei Gradinariu, Constantin Caldararu, Cristian Capiteanu, Andrei Naziru, Bogdan Diaconescu, Vicentiu Iancu, Razvan Dabu, Daniel Ursescu, Ioan Dancus, Calin Alexandru Ur, Kazuo A. Tanaka, and Nicolae Victor Zamfir

Subjects
Nuclear and High Energy Physics, Nuclear Energy and Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Abstract

We report on the generation and delivery of 10.2 PW peak power laser pulses, using the High Power Laser System at the Extreme Laser Infrastructure – Nuclear Physics facility. In this work we demonstrate for the first time, to the best of our knowledge, the compression and propagation of full energy, full aperture, laser pulses that reach a power level of more than 10 PW.

Published
2022

4. Qualification and Optimization of Helical Phase Pulses in PW-Class Laser Systems

Author

Vicentiu Iancu, Maria Talposi, Stefan Popa, Petru Ghenuche, Mihail Cernaianu, Domenico Doria, Gabriel Cojocaru, Ioan Dancus, Razvan Ungureanu, Olivier Chalus, and Daniel Ursescu

Abstract

Optical vortices, generated by a spiral phase plate, were propagated over long distances and focused in the PW experimental area. A deformable mirror was used to correct the low-order distortions, obtaining a doughnut focus.

Published
2022

5. 10 PW Peak Power Laser at the Extreme Light Infrastructure Nuclear Physics – status updates

Author

Ioan Dancus, Gabriel V. Cojocaru, Robert Schmelz, Dan Matei, Lidia Vasescu, Dmitrii Nistor, Anda-Maria Talposi, Vicentiu Iancu, Gabriel P. Bleotu, Andrei Naziru, Alexandru Lazar, Alice Dumitru, Antonia Toma, Marius Neagoe, Stefan Popa, Saidbek Norbaev, Cristian Alexe, Andreea Calin, Costin Ene, Adrian Toader, Nicolae Stan, Mihai Caragea, Sorin Moldoveanu, Olivier Chalus, Christophe Derycke, Christophe Radier, Sandrine Ricaud, Vincent Leroux, Caroline Richard, François Lureau, Andrei Baleanu, Romeo Banici, Alexandru Ailincutei, Iulian Moroianu, Andrei Gradinariu, Constantin Caldararu, Cristian Capiteanu, Daniel Ursescu, Domenico Doria, Ovidiu Tesileanu, Takahisa Jitsuno, Razvan Dabu, Kazuo A Tanaka, Sydney Gales, and Calin Alexandru Ur

Abstract

We have shown, for the first time in the world, the production of 10 PW peak power laser pulses and their propagation to an experimental area at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP). We are also steadily running the laser system for experimental campaigns, increasing the output power levels delivered for experiments and fine-tuning the parameters of the laser pulses, the operational procedures, and the operational teams. During our presentation, we will show the laser developments at ELI-NP emphasizing the 10 PW peak power demonstrations and the latest results for the HPLS beam delivery.

Published
2022

6. First HPLS Experiments at ELI-NP: Spectral Broadening in Thin Films

Author

Andrei Gradinariu, R. Banici, Bogdan Tatulea, Gerard Mourou, Alexandru Lazar, Veselin Aleksandrov, Andrei Baleanu, Bertrand De Boisdeffre, Daniel Popa, Dmitrii Nistor, Miklos Kiss, Ovidiu Tesileanu, Madalin Rosu, Mihai Caragea, Yoshihide Nakamiya, J. Wheeler, Masruri Masruri, Adrian Toader, Daniel Ursescu, Andrei Naziru, I. Dancus, Loredana Caratas, Vlad Luta, Vicentiu Iancu, Dan Matei, Takahisa Jitsuno, Nicu Stan, Maria Talposi, Gabriel Bleotu, Costin Ene, and Mihail Octavian Cernaianu

Subjects
Materials science, High power lasers, law, Pulse compression, business.industry, Phase-contrast imaging, Optoelectronics, Thin film, Laser, business, Doppler broadening, law.invention
Abstract

Following the completion of the installation and testing of the HPLS 2x10PW laser system at ELI-NP, prospective experiments related to spectral broadening in thin films for post-compression were performed at the HPLS 100TW output.

Published
2020

7. Wavefront Metrology Developments using Adaptive Optics and Debris Shield Wavefront Measurements

Author

Viorel Nastasa, Georgios Kolliopoulos, Vicentiu Iancu, Yoshihide Nakamiya, and Daniel Ursescu

Subjects
Wavefront, Physics, Extreme Light Infrastructure, business.industry, Physics::Optics, Laser, 01 natural sciences, Deformable mirror, law.invention, Metrology, Optics, law, 0103 physical sciences, Femtosecond, 010306 general physics, Adaptive optics, business, Front (military)
Abstract

A real-time closed feedback loop adaptive optics (AO) set-up has been developed for optical wave front qualification at Extreme Light Infrastructure — Nuclear Physics facility that hosts a dual arm 10 PW high power laser system [1]. The AO allows a dynamic wave front correction associated to optical components for high-peak ultra-short femtosecond laser systems. The AO set-up consists in (1) a Shack-Hartman wave front sensor (SHWFS), for measuring optical wave front deviations, (2) a deformable mirror (DM) that changes its shape in order to modify a distorted optical wave front, (3) a real-time closed control software to calculate the corresponding shape that the DM must assume in order to compensate the wave front distortions, and (4) a second SHWFS that provides wave front measuring capabilities for ∼ 10 mm and 50 mm, respectively, laser beam diameter [2].

Published
2019

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