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High-energy hybrid femtosecond laser system demonstrating 2×10 PW capability

High Power Laser Science and Engineering 2020年第4期8卷 104-118页

作者： François Lureau Guillaume Matras Olivier Chalus Christophe Derycke Thomas Morbieu Christophe Radier Olivier Casagrande Sébastien Laux Sandrine Ricaud gilles rey Alain Pellegrina Caroline Richard Laurent Boudjemaa Christophe Simon-Boisson Andrei Baleanu Romeo Banici Andrei Gradinariu Constantin Caldararu Bertrand De Boisdeffre Petru Ghenuche Andrei Naziru Georgios Kolliopoulos Liviu Neagu Razvan Dabu Ioan Dancus Daniel Ursescu Thales LAS France 78990 ElancourtFrance Thales Systems Romania 060071 BucurestiRomania Extreme Light Infrastructure-Nuclear Physics ‘Horia Hulubei’National Institute for Physics and Nuclear Engineering077125 Bucharest MagureleRomania University of Bucharest Faculty of Physics077125 Bucharest MagureleRomania

We report on a two-arm hybrid high-power laser system(HPLS)able to deliver 2×10 PW femtosecond pulses,developed at the Bucharest-Magurele Extreme Light Infrastructure Nuclear Physics(ELI-NP)Facility.A hybrid frontend(FE)based on a Ti:sapphire chirped pulse amplifier and a picosecond optical parametric chirped pulse amplifier based on beta barium borate(BBO)crystals,with a cross-polarized wave(XPW)filter in between,has been *** delivers 10 mJ laser pulses,at 10 Hz repetition rate,with more than 70 nm spectral bandwidth and high-intensity contrast,in the range of 1013:*** high-energy Ti:sapphire amplifier stages of both arms were seeded from this common *** final high-energy amplifier,equipped with a 200 mm diameter Ti:sapphire crystal,has been pumped by six 100 J nanosecond frequency doubled Nd:glass lasers,at 1 pulse/min repetition *** than 300 J output pulse energy has been obtained by pumping with only 80%of the whole 600 J available pump *** compressor has a transmission efficiency of 74%and an output pulse duration of 22.7 fs was measured,thus demonstrating that the dual-arm HPLS has the capacity to generate 10 PW peak power femtosecond *** reported results represent the cornerstone of the ELI-NP 2×10 PW femtosecond laser facility,devoted to fundamental and applied nuclear physics research.

关键词： lasers high-power laser pulses ultra-short laser pulses

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High-energy hybrid femtosecond laser system demonstrating 2 × 10 PW capability

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High Power Laser Science and Engineering 2020年第4期8卷 108-122页

作者： Fran?ois Lureau Guillaume Matras Olivier Chalus Christophe Derycke Thomas Morbieu Christophe Radier Olivier Casagrande Sébastien Laux Sandrine Ricaud gilles rey Alain Pellegrina Caroline Richard Laurent Boudjemaa Christophe Simon-Boisson Andrei Baleanu Romeo Banici Andrei Gradinariu Constantin Caldararu Bertrand De Boisdeffre Petru Ghenuche Andrei Naziru Georgios Kolliopoulos Liviu Neagu Razvan Dabu Ioan Dancus Daniel Ursescu Thales LAS France Thales Systems Romania Extreme Light Infrastructure – Nuclear Physics ‘Horia Hulubei' National Institute for Physics and Nuclear Engineering University of Bucharest Faculty of Physics

We report on a two-arm hybrid high-power laser system(HPLS) able to deliver 2 × 10 PW femtosecond pulses,developed at the Bucharest-Magurele Extreme Light Infrastructure Nuclear Physics(ELI-NP) Facility. A hybrid frontend(FE) based on a Ti:sapphire chirped pulse amplifier and a picosecond optical parametric chirped pulse amplifier based on beta barium borate(BBO) crystals, with a cross-polarized wave(XPW) filter in between, has been *** delivers 10 mJ laser pulses, at 10 Hz repetition rate, with more than 70 nm spectral bandwidth and high-intensity contrast, in the range of 1013:1. The high-energy Ti:sapphire amplifier stages of both arms were seeded from this common FE. The final high-energy amplifier, equipped with a 200 mm diameter Ti:sapphire crystal, has been pumped by six 100 J nanosecond frequency doubled Nd:glass lasers, at 1 pulse/min repetition rate. More than 300 J output pulse energy has been obtained by pumping with only 80% of the whole 600 J available pump energy. The compressor has a transmission efficiency of 74% and an output pulse duration of 22.7 fs was measured, thus demonstrating that the dual-arm HPLS has the capacity to generate 10 PW peak power femtosecond pulses. The reported results represent the cornerstone of the ELI-NP 2 × 10 PW femtosecond laser facility, devoted to fundamental and applied nuclear physics research.

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A common metabolomic signature is observed upon inoculation of rice roots with various rhizobacteria

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Journal of Integrative Plant Biology 2020年第2期62卷 228-246页

作者： Marine Valette Marjolaine rey Florence Gerin gilles Comte Florence Wisniewski-Dyé Universite de Lyon Universite Lyon1Ecologie MicrobienneCNRS UMR-5557INRA UMR-1418VetAgroSup43 boulevard du 11 novembre 191869622 VilleurbanneFrance

Plant growth-promoting rhizobacteria(PGPR),whose growth is stimulated by root exudates,are able to improve plant growth and *** those,bacteria of the genus Azospirillum were shown to affect root secondary metabolite content in rice and maize,sometimes without visible effects on root *** studies also revealed that expression of several genes involved in stress and plant defense was affected,albeit with fewer genes when a strain was inoculated onto its original host ***,we investigated,via a metabolic profiling approach,whether rice roots responded differently and with gradual intensity to various PGPR,isolated from rice or not.A common metabolomic signature of nine compounds was highlighted,with the reduced accumulation of three alkylresorcinols and increased accumulation of two hydroxycinnamic acid amides(HCAA),identified as N-p-coumaroylputrescine and *** was accompanied by the increased transcription of two genes involved in the N-feruloylputrescine biosynthetic ***,exposure to a rice bacterial pathogen triggered a reduced accumulation of these HCAA in roots,a result contrasting with previous reports of increased HCAA content in leaves upon pathogen *** of HCAA,that are potential antimicrobial compounds,might be considered as a primary reaction of plant to bacterial perception.

关键词： PGPR various rhizobacteria root exudates

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