Current status and highlights of the ELI-NP research program

Tanaka, K. A.; Spohr, K.; Balabanski, D. L.; Balascuta, S.; Capponi, L.; Cernaianu, Mihail; Cuciuc, Mihai; Cucoanes, A.; Dancus, I.; Dhal, A.; Diaconescu, Bogdan; Doria, D.; Ghenuche, Petru; Ghiţă, D.; Kisyov, S.; Nastasa, Viorel; Ong, J. F.; Rotaru, F.; Sangwan, Deepak; Söderström, P.-A.; Stutman, D.; Suliman, G.; Tešileanu, O.; Tudor, Lorainne; Tsoneva, N.; Ur, C. A.; Ursescu, D.; Zamfir, N. V.

doi:10.1063/1.5093535

Cited by 146 publications

(76 citation statements)

References 104 publications

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“…Four additional outputs are available, two at 1 PW with 1 Hz repetition rate, and two at 100 TW at 10 Hz repetition rate, obtained by extracting the pulses at intermediary amplification levels and compressing them using dedicated compressors. These six beams are delivered to five experimental areas [33][34][35] .…”

Section: The Eli-np Hpls Design and Subsystemsmentioning

confidence: 99%

“…This HPLS has been developed for the Extreme Light Infrastructure Nuclear Physics (ELI-NP) facility at the National Institute for Nuclear Physics and Engineering in Bucharest-Magurele. The core mission of this ultra-intense laser facility is to use extreme fields and pressure generated with high-power femtosecond laser pulses for fundamental and applied nuclear physics research [33][34][35] .…”

Section: Introductionmentioning

confidence: 99%

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

Lureau

Matras

Chalus

et al. 2020

High Pow Laser Sci Eng

138

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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 front-end (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 developed. It 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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Section: The Eli-np Hpls Design and Subsystemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Lureau

Matras

Chalus

et al. 2020

High Pow Laser Sci Eng

138

View full text Add to dashboard Cite

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“…FAIR) to improve the database and theoretical modeling to understand astrophysical data. Concrete experiments are planned at ELI 10,38 to demonstrate the production of neutron-rich nuclei at the N = 126 waiting point with lasers. We believe that the method presented here is ideally suited to detect such products.…”

Section: Scientific Motivation and Relevancementioning

confidence: 99%

“…This present experiment, conducted at the PHELIX facility 8 , the P etawatt H igh- E nergy L aser for Heavy- I on e X periments at GSI in Darmstadt, Germany, is part of the early development phase of a platform for future nuclear physics experiments at other advanced laser facilities (e. g. ELI-NP (Romania) 9 , 10 and ARC (LLNL) 11 ). Due to its continuous gas flow, the method used is also well suited for high repetitive lasers like ELI-Beamlines (Czech Republic) 12 , BELLA (LBNL) 13 , Draco (HZDR) 14 , J-KAREN (KPSI) 15 , and CoReLS (South Korea) 16 .…”

Section: Introductionmentioning

confidence: 99%

First on-line detection of radioactive fission isotopes produced by laser-accelerated protons

Boller

Zylstra

Neumayer

et al. 2020

Sci Rep

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The on-going developments in laser acceleration of protons and light ions, as well as the production of strong bursts of neutrons and multi-$$\hbox {MeV}$$ MeV photons by secondary processes now provide a basis for novel high-flux nuclear physics experiments. While the maximum energy of protons resulting from Target Normal Sheath Acceleration is presently still limited to around $$100 \, \hbox {MeV}$$ 100 MeV , the generated proton peak flux within the short laser-accelerated bunches can already today exceed the values achievable at the most advanced conventional accelerators by orders of magnitude. This paper consists of two parts covering the scientific motivation and relevance of such experiments and a first proof-of-principle demonstration. In the presented experiment pulses of $$200 \, \hbox {J}$$ 200 J at $$\approx \, 500 \, \hbox {fs}$$ ≈ 500 fs duration from the PHELIX laser produced more than $$10^{12}$$ 10 12 protons with energies above $$15 \, \hbox {MeV}$$ 15 MeV in a bunch of sub-nanosecond duration. They were used to induce fission in foil targets made of natural uranium. To make use of the nonpareil flux, these targets have to be very close to the laser acceleration source, since the particle density within the bunch is strongly affected by Coulomb explosion and the velocity differences between ions of different energy. The main challenge for nuclear detection with high-purity germanium detectors is given by the strong electromagnetic pulse caused by the laser-matter interaction close to the laser acceleration source. This was mitigated by utilizing fast transport of the fission products by a gas flow to a carbon filter, where the $$\upgamma$$ γ -rays were registered. The identified nuclides include those that have half-lives down to $$39 \, \hbox {s}$$ 39 s . These results demonstrate the capability to produce, extract, and detect short-lived reaction products under the demanding experimental condition imposed by the high-power laser interaction. The approach promotes research towards relevant nuclear astrophysical studies at conditions currently only accessible at nuclear high energy density laser facilities.

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“…Some possibilities that have been under discussion to perform this independent confirmation is to either return to the HPGe approach with complex detector systems and event processing like the Advanced GAmma Tracking Array (AGATA) set-up 13,14 or highly charged radioactive ions 15 . Here we report on an experiment using the ELI Gamma Above Neutron Threshold (ELIGANT) detector system 16,17 (ELI-NP) facilities [18][19][20] in a configuration 21 similar to what was used in reference 11 . The experimental set-up was optimised for obtaining a clean signal over a wide angular range 21 based on the reported intensities of the decay mode.…”

mentioning

confidence: 99%

Electromagnetic character of the competitive γγ/γ-decay from 137mBa

et al. 2020

Self Cite

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Second-order processes in physics is a research topic focusing attention from several fields worldwide including, for example, non-linear quantum electrodynamics with high-power lasers, neutrinoless double-β decay, and stimulated atomic two-photon transitions. For the electromagnetic nuclear interaction, the observation of the competitive double-γ decay from 137m Ba has opened up the nuclear structure field for detailed investigation of second-order processes through the manifestation of off-diagonal nuclear polarisability. Here, we confirm this observation with an 8.7σ significance, and an improved value on the double-photon versus single-photon branching ratio as 2.62 × 10 −6 (30). Our results, however, contradict the conclusions from the original experiment, where the decay was interpreted to be dominated by a quadrupole-quadrupole component. Here, we find a substantial enhancement in the energy distribution consistent with a dominating octupole-dipole character and a rather small quadrupole-quadrupole component in the decay, hindered due to an evolution of the internal nuclear structure. The implied strongly hindered double-photon branching in 137m Ba opens up the possibility of the double-photon branching as a feasible tool for nuclear-structure studies on off-diagonal polarisability in nuclei where this hindrance is not present.

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Current status and highlights of the ELI-NP research program

Cited by 146 publications

References 104 publications

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

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

First on-line detection of radioactive fission isotopes produced by laser-accelerated protons

Electromagnetic character of the competitive γγ/γ-decay from 137mBa

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